1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/* exynos_drm_gem.h
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Authoer: Inki Dae <inki.dae@samsung.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _EXYNOS_DRM_GEM_H_
#define _EXYNOS_DRM_GEM_H_
#define to_exynos_gem_obj(x) container_of(x,\
struct exynos_drm_gem_obj, base)
/*
* exynos drm gem buffer structure.
*
* @kvaddr: kernel virtual address to allocated memory region.
* @dma_addr: bus address(accessed by dma) to allocated memory region.
* - this address could be physical address without IOMMU and
* device address with IOMMU.
* @sgt: sg table to transfer page data.
* @pages: contain all pages to allocated memory region.
* @size: size of allocated memory region.
*/
struct exynos_drm_gem_buf {
void __iomem *kvaddr;
dma_addr_t dma_addr;
struct sg_table *sgt;
struct page **pages;
unsigned long size;
};
/*
* exynos drm buffer structure.
*
* @base: a gem object.
* - a new handle to this gem object would be created
* by drm_gem_handle_create().
* @buffer: a pointer to exynos_drm_gem_buffer object.
* - contain the information to memory region allocated
* by user request or at framebuffer creation.
* continuous memory region allocated by user request
* or at framebuffer creation.
* @size: total memory size to physically non-continuous memory region.
* @flags: indicate memory type to allocated buffer and cache attruibute.
*
* P.S. this object would be transfered to user as kms_bo.handle so
* user can access the buffer through kms_bo.handle.
*/
struct exynos_drm_gem_obj {
struct drm_gem_object base;
struct exynos_drm_gem_buf *buffer;
unsigned long size;
unsigned int flags;
};
/* destroy a buffer with gem object */
void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
/* create a new buffer with gem object */
struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
unsigned int flags,
unsigned long size);
/*
* request gem object creation and buffer allocation as the size
* that it is calculated with framebuffer information such as width,
* height and bpp.
*/
int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/*
* get dma address from gem handle and this function could be used for
* other drivers such as 2d/3d acceleration drivers.
* with this function call, gem object reference count would be increased.
*/
void *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
unsigned int gem_handle,
struct drm_file *file_priv);
/*
* put dma address from gem handle and this function could be used for
* other drivers such as 2d/3d acceleration drivers.
* with this function call, gem object reference count would be decreased.
*/
void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
unsigned int gem_handle,
struct drm_file *file_priv);
/* get buffer offset to map to user space. */
int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/*
* mmap the physically continuous memory that a gem object contains
* to user space.
*/
int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* initialize gem object. */
int exynos_drm_gem_init_object(struct drm_gem_object *obj);
/* free gem object. */
void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
/* create memory region for drm framebuffer. */
int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
/* map memory region for drm framebuffer to user space. */
int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
struct drm_device *dev, uint32_t handle,
uint64_t *offset);
/*
* destroy memory region allocated.
* - a gem handle and physical memory region pointed by a gem object
* would be released by drm_gem_handle_delete().
*/
int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
struct drm_device *dev,
unsigned int handle);
/* page fault handler and mmap fault address(virtual) to physical memory. */
int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
/* set vm_flags and we can change the vm attribute to other one at here. */
int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
#endif
|
