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
|
// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include "gem/i915_gem_ioctls.h"
#include "gem/i915_gem_region.h"
#include "i915_drv.h"
#include "i915_trace.h"
static int i915_gem_publish(struct drm_i915_gem_object *obj,
struct drm_file *file,
u64 *size_p,
u32 *handle_p)
{
u64 size = obj->base.size;
int ret;
ret = drm_gem_handle_create(file, &obj->base, handle_p);
/* drop reference from allocate - handle holds it now */
i915_gem_object_put(obj);
if (ret)
return ret;
*size_p = size;
return 0;
}
static int
i915_gem_setup(struct drm_i915_gem_object *obj,
struct intel_memory_region *mr,
u64 size)
{
int ret;
GEM_BUG_ON(!is_power_of_2(mr->min_page_size));
size = round_up(size, mr->min_page_size);
if (size == 0)
return -EINVAL;
/* For most of the ABI (e.g. mmap) we think in system pages */
GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE));
if (i915_gem_object_size_2big(size))
return -E2BIG;
ret = mr->ops->init_object(mr, obj, size, 0);
if (ret)
return ret;
GEM_BUG_ON(size != obj->base.size);
trace_i915_gem_object_create(obj);
return 0;
}
int
i915_gem_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
struct drm_i915_gem_object *obj;
enum intel_memory_type mem_type;
int cpp = DIV_ROUND_UP(args->bpp, 8);
u32 format;
int ret;
switch (cpp) {
case 1:
format = DRM_FORMAT_C8;
break;
case 2:
format = DRM_FORMAT_RGB565;
break;
case 4:
format = DRM_FORMAT_XRGB8888;
break;
default:
return -EINVAL;
}
/* have to work out size/pitch and return them */
args->pitch = ALIGN(args->width * cpp, 64);
/* align stride to page size so that we can remap */
if (args->pitch > intel_plane_fb_max_stride(to_i915(dev), format,
DRM_FORMAT_MOD_LINEAR))
args->pitch = ALIGN(args->pitch, 4096);
if (args->pitch < args->width)
return -EINVAL;
args->size = mul_u32_u32(args->pitch, args->height);
mem_type = INTEL_MEMORY_SYSTEM;
if (HAS_LMEM(to_i915(dev)))
mem_type = INTEL_MEMORY_LOCAL;
obj = i915_gem_object_alloc();
if (!obj)
return -ENOMEM;
ret = i915_gem_setup(obj,
intel_memory_region_by_type(to_i915(dev),
mem_type),
args->size);
if (ret)
goto object_free;
return i915_gem_publish(obj, file, &args->size, &args->handle);
object_free:
i915_gem_object_free(obj);
return ret;
}
/**
* Creates a new mm object and returns a handle to it.
* @dev: drm device pointer
* @data: ioctl data blob
* @file: drm file pointer
*/
int
i915_gem_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_private *i915 = to_i915(dev);
struct drm_i915_gem_create *args = data;
struct drm_i915_gem_object *obj;
int ret;
i915_gem_flush_free_objects(i915);
obj = i915_gem_object_alloc();
if (!obj)
return -ENOMEM;
ret = i915_gem_setup(obj,
intel_memory_region_by_type(i915,
INTEL_MEMORY_SYSTEM),
args->size);
if (ret)
goto object_free;
return i915_gem_publish(obj, file, &args->size, &args->handle);
object_free:
i915_gem_object_free(obj);
return ret;
}
|
