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
|
/*
* Copyright 2014 Canonical
*
* 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 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: Andreas Pokorny
*/
#include <drm/drm_prime.h>
#include <linux/virtio_dma_buf.h>
#include "virtgpu_drv.h"
static int virtgpu_virtio_get_uuid(struct dma_buf *buf,
uuid_t *uuid)
{
struct drm_gem_object *obj = buf->priv;
struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
struct virtio_gpu_device *vgdev = obj->dev->dev_private;
wait_event(vgdev->resp_wq, bo->uuid_state != STATE_INITIALIZING);
if (bo->uuid_state != STATE_OK)
return -ENODEV;
uuid_copy(uuid, &bo->uuid);
return 0;
}
const struct virtio_dma_buf_ops virtgpu_dmabuf_ops = {
.ops = {
.cache_sgt_mapping = true,
.attach = virtio_dma_buf_attach,
.detach = drm_gem_map_detach,
.map_dma_buf = drm_gem_map_dma_buf,
.unmap_dma_buf = drm_gem_unmap_dma_buf,
.release = drm_gem_dmabuf_release,
.mmap = drm_gem_dmabuf_mmap,
.vmap = drm_gem_dmabuf_vmap,
.vunmap = drm_gem_dmabuf_vunmap,
},
.device_attach = drm_gem_map_attach,
.get_uuid = virtgpu_virtio_get_uuid,
};
int virtio_gpu_resource_assign_uuid(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *bo)
{
int ret;
struct virtio_gpu_object_array *objs;
objs = virtio_gpu_array_alloc(1);
if (!objs)
return -ENOMEM;
virtio_gpu_array_add_obj(objs, &bo->base.base);
ret = virtio_gpu_cmd_resource_assign_uuid(vgdev, objs);
if (ret)
return ret;
return 0;
}
struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
int flags)
{
struct dma_buf *buf;
struct drm_device *dev = obj->dev;
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
int ret = 0;
bool blob = bo->host3d_blob || bo->guest_blob;
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
if (!blob) {
if (vgdev->has_resource_assign_uuid) {
ret = virtio_gpu_resource_assign_uuid(vgdev, bo);
if (ret)
return ERR_PTR(ret);
virtio_gpu_notify(vgdev);
} else {
bo->uuid_state = STATE_ERR;
}
}
exp_info.ops = &virtgpu_dmabuf_ops.ops;
exp_info.size = obj->size;
exp_info.flags = flags;
exp_info.priv = obj;
exp_info.resv = obj->resv;
buf = virtio_dma_buf_export(&exp_info);
if (IS_ERR(buf))
return buf;
drm_dev_get(dev);
drm_gem_object_get(obj);
return buf;
}
struct drm_gem_object *virtgpu_gem_prime_import(struct drm_device *dev,
struct dma_buf *buf)
{
struct drm_gem_object *obj;
if (buf->ops == &virtgpu_dmabuf_ops.ops) {
obj = buf->priv;
if (obj->dev == dev) {
/*
* Importing dmabuf exported from our own gem increases
* refcount on gem itself instead of f_count of dmabuf.
*/
drm_gem_object_get(obj);
return obj;
}
}
return drm_gem_prime_import(dev, buf);
}
struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
struct drm_device *dev, struct dma_buf_attachment *attach,
struct sg_table *table)
{
return ERR_PTR(-ENODEV);
}
|
