1
2
3#ifndef __DRM_GEM_SHMEM_HELPER_H__
4#define __DRM_GEM_SHMEM_HELPER_H__
5
6#include <linux/fs.h>
7#include <linux/mm.h>
8#include <linux/mutex.h>
9
10#include <drm/drm_file.h>
11#include <drm/drm_gem.h>
12#include <drm/drm_ioctl.h>
13#include <drm/drm_prime.h>
14
15struct dma_buf_attachment;
16struct drm_mode_create_dumb;
17struct drm_printer;
18struct sg_table;
19
20
21
22
23struct drm_gem_shmem_object {
24
25
26
27 struct drm_gem_object base;
28
29
30
31
32 struct mutex pages_lock;
33
34
35
36
37 struct page **pages;
38
39
40
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42
43
44
45 unsigned int pages_use_count;
46
47
48
49
50
51
52 unsigned int pages_mark_dirty_on_put : 1;
53
54
55
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57
58
59 unsigned int pages_mark_accessed_on_put : 1;
60
61
62
63
64 struct sg_table *sgt;
65
66
67
68
69 struct mutex vmap_lock;
70
71
72
73
74 void *vaddr;
75
76
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80
81
82 unsigned int vmap_use_count;
83};
84
85#define to_drm_gem_shmem_obj(obj) \
86 container_of(obj, struct drm_gem_shmem_object, base)
87
88
89
90
91
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98
99
100
101#define DEFINE_DRM_GEM_SHMEM_FOPS(name) \
102 static const struct file_operations name = {\
103 .owner = THIS_MODULE,\
104 .open = drm_open,\
105 .release = drm_release,\
106 .unlocked_ioctl = drm_ioctl,\
107 .compat_ioctl = drm_compat_ioctl,\
108 .poll = drm_poll,\
109 .read = drm_read,\
110 .llseek = noop_llseek,\
111 .mmap = drm_gem_shmem_mmap, \
112 }
113
114struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size);
115void drm_gem_shmem_free_object(struct drm_gem_object *obj);
116
117int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem);
118void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem);
119int drm_gem_shmem_pin(struct drm_gem_object *obj);
120void drm_gem_shmem_unpin(struct drm_gem_object *obj);
121void *drm_gem_shmem_vmap(struct drm_gem_object *obj);
122void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr);
123
124struct drm_gem_shmem_object *
125drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
126 struct drm_device *dev, size_t size,
127 uint32_t *handle);
128int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
129 struct drm_mode_create_dumb *args);
130
131int drm_gem_shmem_mmap(struct file *filp, struct vm_area_struct *vma);
132
133extern const struct vm_operations_struct drm_gem_shmem_vm_ops;
134
135void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent,
136 const struct drm_gem_object *obj);
137
138struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj);
139struct drm_gem_object *
140drm_gem_shmem_prime_import_sg_table(struct drm_device *dev,
141 struct dma_buf_attachment *attach,
142 struct sg_table *sgt);
143
144struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_object *obj);
145
146
147
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149
150
151
152#define DRM_GEM_SHMEM_DRIVER_OPS \
153 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
154 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
155 .gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table, \
156 .gem_prime_mmap = drm_gem_prime_mmap, \
157 .dumb_create = drm_gem_shmem_dumb_create
158
159#endif
160