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
41
42
43
44
45 unsigned int pages_use_count;
46
47
48
49
50
51
52
53
54 int madv;
55
56
57
58
59
60
61 struct list_head madv_list;
62
63
64
65
66
67
68 unsigned int pages_mark_dirty_on_put : 1;
69
70
71
72
73
74
75 unsigned int pages_mark_accessed_on_put : 1;
76
77
78
79
80 struct sg_table *sgt;
81
82
83
84
85 struct mutex vmap_lock;
86
87
88
89
90 void *vaddr;
91
92
93
94
95
96
97
98 unsigned int vmap_use_count;
99
100
101
102
103 bool map_cached;
104};
105
106#define to_drm_gem_shmem_obj(obj) \
107 container_of(obj, struct drm_gem_shmem_object, base)
108
109struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size);
110void drm_gem_shmem_free_object(struct drm_gem_object *obj);
111
112int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem);
113void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem);
114int drm_gem_shmem_pin(struct drm_gem_object *obj);
115void drm_gem_shmem_unpin(struct drm_gem_object *obj);
116void *drm_gem_shmem_vmap(struct drm_gem_object *obj);
117void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr);
118
119int drm_gem_shmem_madvise(struct drm_gem_object *obj, int madv);
120
121static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem)
122{
123 return (shmem->madv > 0) &&
124 !shmem->vmap_use_count && shmem->sgt &&
125 !shmem->base.dma_buf && !shmem->base.import_attach;
126}
127
128void drm_gem_shmem_purge_locked(struct drm_gem_object *obj);
129bool drm_gem_shmem_purge(struct drm_gem_object *obj);
130
131struct drm_gem_shmem_object *
132drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
133 struct drm_device *dev, size_t size,
134 uint32_t *handle);
135
136struct drm_gem_object *
137drm_gem_shmem_create_object_cached(struct drm_device *dev, size_t size);
138
139int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
140 struct drm_mode_create_dumb *args);
141
142int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
143
144void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent,
145 const struct drm_gem_object *obj);
146
147struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj);
148struct drm_gem_object *
149drm_gem_shmem_prime_import_sg_table(struct drm_device *dev,
150 struct dma_buf_attachment *attach,
151 struct sg_table *sgt);
152
153struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_object *obj);
154
155
156
157
158
159
160
161#define DRM_GEM_SHMEM_DRIVER_OPS \
162 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
163 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
164 .gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table, \
165 .gem_prime_mmap = drm_gem_prime_mmap, \
166 .dumb_create = drm_gem_shmem_dumb_create
167
168#endif
169