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1c248b7d ID |
1 | /* exynos_drm_gem.h |
2 | * | |
3 | * Copyright (c) 2011 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_GEM_H_ | |
27 | #define _EXYNOS_DRM_GEM_H_ | |
28 | ||
29 | #define to_exynos_gem_obj(x) container_of(x,\ | |
30 | struct exynos_drm_gem_obj, base) | |
31 | ||
dcf9af82 ID |
32 | #define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG) |
33 | ||
2c871127 ID |
34 | /* |
35 | * exynos drm gem buffer structure. | |
36 | * | |
37 | * @kvaddr: kernel virtual address to allocated memory region. | |
38 | * @dma_addr: bus address(accessed by dma) to allocated memory region. | |
39 | * - this address could be physical address without IOMMU and | |
40 | * device address with IOMMU. | |
2b35892e ID |
41 | * @sgt: sg table to transfer page data. |
42 | * @pages: contain all pages to allocated memory region. | |
b2df26c1 | 43 | * @page_size: could be 4K, 64K or 1MB. |
2c871127 ID |
44 | * @size: size of allocated memory region. |
45 | */ | |
46 | struct exynos_drm_gem_buf { | |
47 | void __iomem *kvaddr; | |
48 | dma_addr_t dma_addr; | |
2b35892e ID |
49 | struct sg_table *sgt; |
50 | struct page **pages; | |
b2df26c1 | 51 | unsigned long page_size; |
2c871127 ID |
52 | unsigned long size; |
53 | }; | |
54 | ||
1c248b7d ID |
55 | /* |
56 | * exynos drm buffer structure. | |
57 | * | |
58 | * @base: a gem object. | |
59 | * - a new handle to this gem object would be created | |
60 | * by drm_gem_handle_create(). | |
2c871127 ID |
61 | * @buffer: a pointer to exynos_drm_gem_buffer object. |
62 | * - contain the information to memory region allocated | |
63 | * by user request or at framebuffer creation. | |
1c248b7d ID |
64 | * continuous memory region allocated by user request |
65 | * or at framebuffer creation. | |
2b35892e ID |
66 | * @size: total memory size to physically non-continuous memory region. |
67 | * @flags: indicate memory type to allocated buffer and cache attruibute. | |
1c248b7d ID |
68 | * |
69 | * P.S. this object would be transfered to user as kms_bo.handle so | |
70 | * user can access the buffer through kms_bo.handle. | |
71 | */ | |
72 | struct exynos_drm_gem_obj { | |
ee5e770e JS |
73 | struct drm_gem_object base; |
74 | struct exynos_drm_gem_buf *buffer; | |
2b35892e ID |
75 | unsigned long size; |
76 | unsigned int flags; | |
1c248b7d ID |
77 | }; |
78 | ||
b2df26c1 ID |
79 | struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask); |
80 | ||
2364839a JS |
81 | /* destroy a buffer with gem object */ |
82 | void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj); | |
83 | ||
b2df26c1 ID |
84 | /* create a private gem object and initialize it. */ |
85 | struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, | |
86 | unsigned long size); | |
87 | ||
2364839a | 88 | /* create a new buffer with gem object */ |
f088d5a9 | 89 | struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
2b35892e ID |
90 | unsigned int flags, |
91 | unsigned long size); | |
1c248b7d ID |
92 | |
93 | /* | |
94 | * request gem object creation and buffer allocation as the size | |
95 | * that it is calculated with framebuffer information such as width, | |
96 | * height and bpp. | |
97 | */ | |
98 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, | |
ee5e770e | 99 | struct drm_file *file_priv); |
1c248b7d | 100 | |
f0b1bda7 ID |
101 | /* |
102 | * get dma address from gem handle and this function could be used for | |
103 | * other drivers such as 2d/3d acceleration drivers. | |
104 | * with this function call, gem object reference count would be increased. | |
105 | */ | |
106 | void *exynos_drm_gem_get_dma_addr(struct drm_device *dev, | |
107 | unsigned int gem_handle, | |
108 | struct drm_file *file_priv); | |
109 | ||
110 | /* | |
111 | * put dma address from gem handle and this function could be used for | |
112 | * other drivers such as 2d/3d acceleration drivers. | |
113 | * with this function call, gem object reference count would be decreased. | |
114 | */ | |
115 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
116 | unsigned int gem_handle, | |
117 | struct drm_file *file_priv); | |
118 | ||
1c248b7d ID |
119 | /* get buffer offset to map to user space. */ |
120 | int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, | |
ee5e770e | 121 | struct drm_file *file_priv); |
1c248b7d | 122 | |
ee5e770e JS |
123 | /* |
124 | * mmap the physically continuous memory that a gem object contains | |
125 | * to user space. | |
126 | */ | |
127 | int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
128 | struct drm_file *file_priv); | |
1c248b7d ID |
129 | |
130 | /* initialize gem object. */ | |
131 | int exynos_drm_gem_init_object(struct drm_gem_object *obj); | |
132 | ||
133 | /* free gem object. */ | |
134 | void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj); | |
135 | ||
136 | /* create memory region for drm framebuffer. */ | |
137 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
ee5e770e JS |
138 | struct drm_device *dev, |
139 | struct drm_mode_create_dumb *args); | |
1c248b7d ID |
140 | |
141 | /* map memory region for drm framebuffer to user space. */ | |
142 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, | |
ee5e770e JS |
143 | struct drm_device *dev, uint32_t handle, |
144 | uint64_t *offset); | |
1c248b7d ID |
145 | |
146 | /* | |
147 | * destroy memory region allocated. | |
148 | * - a gem handle and physical memory region pointed by a gem object | |
149 | * would be released by drm_gem_handle_delete(). | |
150 | */ | |
151 | int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, | |
ee5e770e JS |
152 | struct drm_device *dev, |
153 | unsigned int handle); | |
154 | ||
155 | /* page fault handler and mmap fault address(virtual) to physical memory. */ | |
156 | int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); | |
157 | ||
158 | /* set vm_flags and we can change the vm attribute to other one at here. */ | |
159 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); | |
1c248b7d ID |
160 | |
161 | #endif |