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
152
153
154
155
156
157
158
159
160
161
162
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef DRM_GEM_VRAM_HELPER_H
#define DRM_GEM_VRAM_HELPER_H
#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/kernel.h> /* for container_of() */
struct drm_mode_create_dumb;
struct drm_vram_mm_funcs;
struct filp;
struct vm_area_struct;
#define DRM_GEM_VRAM_PL_FLAG_VRAM TTM_PL_FLAG_VRAM
#define DRM_GEM_VRAM_PL_FLAG_SYSTEM TTM_PL_FLAG_SYSTEM
/*
* Buffer-object helpers
*/
/**
* struct drm_gem_vram_object - GEM object backed by VRAM
* @gem: GEM object
* @bo: TTM buffer object
* @kmap: Mapping information for @bo
* @placement: TTM placement information. Supported placements are \
%TTM_PL_VRAM and %TTM_PL_SYSTEM
* @placements: TTM placement information.
* @pin_count: Pin counter
*
* The type struct drm_gem_vram_object represents a GEM object that is
* backed by VRAM. It can be used for simple framebuffer devices with
* dedicated memory. The buffer object can be evicted to system memory if
* video memory becomes scarce.
*/
struct drm_gem_vram_object {
struct drm_gem_object gem;
struct ttm_buffer_object bo;
struct ttm_bo_kmap_obj kmap;
/* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */
struct ttm_placement placement;
struct ttm_place placements[2];
int pin_count;
};
/**
* Returns the container of type &struct drm_gem_vram_object
* for field bo.
* @bo: the VRAM buffer object
* Returns: The containing GEM VRAM object
*/
static inline struct drm_gem_vram_object *drm_gem_vram_of_bo(
struct ttm_buffer_object *bo)
{
return container_of(bo, struct drm_gem_vram_object, bo);
}
/**
* Returns the container of type &struct drm_gem_vram_object
* for field gem.
* @gem: the GEM object
* Returns: The containing GEM VRAM object
*/
static inline struct drm_gem_vram_object *drm_gem_vram_of_gem(
struct drm_gem_object *gem)
{
return container_of(gem, struct drm_gem_vram_object, gem);
}
struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
struct ttm_bo_device *bdev,
size_t size,
unsigned long pg_align,
bool interruptible);
void drm_gem_vram_put(struct drm_gem_vram_object *gbo);
int drm_gem_vram_reserve(struct drm_gem_vram_object *gbo, bool no_wait);
void drm_gem_vram_unreserve(struct drm_gem_vram_object *gbo);
u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo);
s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo);
int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag);
int drm_gem_vram_pin_reserved(struct drm_gem_vram_object *gbo,
unsigned long pl_flag);
int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo);
int drm_gem_vram_unpin_reserved(struct drm_gem_vram_object *gbo);
void *drm_gem_vram_kmap_at(struct drm_gem_vram_object *gbo, bool map,
bool *is_iomem, struct ttm_bo_kmap_obj *kmap);
void *drm_gem_vram_kmap(struct drm_gem_vram_object *gbo, bool map,
bool *is_iomem);
void drm_gem_vram_kunmap_at(struct drm_gem_vram_object *gbo,
struct ttm_bo_kmap_obj *kmap);
void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo);
int drm_gem_vram_fill_create_dumb(struct drm_file *file,
struct drm_device *dev,
struct ttm_bo_device *bdev,
unsigned long pg_align,
bool interruptible,
struct drm_mode_create_dumb *args);
/*
* Helpers for struct ttm_bo_driver
*/
void drm_gem_vram_bo_driver_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *pl);
int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo,
struct file *filp);
extern const struct drm_vram_mm_funcs drm_gem_vram_mm_funcs;
/*
* Helpers for struct drm_driver
*/
void drm_gem_vram_driver_gem_free_object_unlocked(struct drm_gem_object *gem);
int drm_gem_vram_driver_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
struct drm_device *dev,
uint32_t handle, uint64_t *offset);
/**
* define DRM_GEM_VRAM_DRIVER - default callback functions for \
&struct drm_driver
*
* Drivers that use VRAM MM and GEM VRAM can use this macro to initialize
* &struct drm_driver with default functions.
*/
#define DRM_GEM_VRAM_DRIVER \
.gem_free_object_unlocked = \
drm_gem_vram_driver_gem_free_object_unlocked, \
.dumb_create = drm_gem_vram_driver_dumb_create, \
.dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset
/*
* PRIME helpers for struct drm_driver
*/
int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj);
void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj);
void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj);
void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj,
void *vaddr);
int drm_gem_vram_driver_gem_prime_mmap(struct drm_gem_object *obj,
struct vm_area_struct *vma);
#define DRM_GEM_VRAM_DRIVER_PRIME \
.gem_prime_export = drm_gem_prime_export, \
.gem_prime_import = drm_gem_prime_import, \
.gem_prime_pin = drm_gem_vram_driver_gem_prime_pin, \
.gem_prime_unpin = drm_gem_vram_driver_gem_prime_unpin, \
.gem_prime_vmap = drm_gem_vram_driver_gem_prime_vmap, \
.gem_prime_vunmap = drm_gem_vram_driver_gem_prime_vunmap, \
.gem_prime_mmap = drm_gem_vram_driver_gem_prime_mmap
#endif
|
