Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26#include <drm/drmP.h>
27#include "virtgpu_drv.h"
28
29void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
30{
31 struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj);
32
33 if (obj)
34 virtio_gpu_object_unref(&obj);
35}
36
37struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
38 size_t size, bool kernel,
39 bool pinned)
40{
41 struct virtio_gpu_device *vgdev = dev->dev_private;
42 struct virtio_gpu_object *obj;
43 int ret;
44
45 ret = virtio_gpu_object_create(vgdev, size, kernel, pinned, &obj);
46 if (ret)
47 return ERR_PTR(ret);
48
49 return obj;
50}
51
52int virtio_gpu_gem_create(struct drm_file *file,
53 struct drm_device *dev,
54 uint64_t size,
55 struct drm_gem_object **obj_p,
56 uint32_t *handle_p)
57{
58 struct virtio_gpu_object *obj;
59 int ret;
60 u32 handle;
61
62 obj = virtio_gpu_alloc_object(dev, size, false, false);
63 if (IS_ERR(obj))
64 return PTR_ERR(obj);
65
66 ret = drm_gem_handle_create(file, &obj->gem_base, &handle);
67 if (ret) {
68 drm_gem_object_release(&obj->gem_base);
69 return ret;
70 }
71
72 *obj_p = &obj->gem_base;
73
74 /* drop reference from allocate - handle holds it now */
75 drm_gem_object_put_unlocked(&obj->gem_base);
76
77 *handle_p = handle;
78 return 0;
79}
80
81int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
82 struct drm_device *dev,
83 struct drm_mode_create_dumb *args)
84{
85 struct virtio_gpu_device *vgdev = dev->dev_private;
86 struct drm_gem_object *gobj;
87 struct virtio_gpu_object *obj;
88 int ret;
89 uint32_t pitch;
90 uint32_t format;
91
92 if (args->bpp != 32)
93 return -EINVAL;
94
95 pitch = args->width * 4;
96 args->size = pitch * args->height;
97 args->size = ALIGN(args->size, PAGE_SIZE);
98
99 ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj,
100 &args->handle);
101 if (ret)
102 goto fail;
103
104 format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);
105 obj = gem_to_virtio_gpu_obj(gobj);
106 virtio_gpu_cmd_create_resource(vgdev, obj, format,
107 args->width, args->height);
108
109 /* attach the object to the resource */
110 ret = virtio_gpu_object_attach(vgdev, obj, NULL);
111 if (ret)
112 goto fail;
113
114 obj->dumb = true;
115 args->pitch = pitch;
116 return ret;
117
118fail:
119 return ret;
120}
121
122int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
123 struct drm_device *dev,
124 uint32_t handle, uint64_t *offset_p)
125{
126 struct drm_gem_object *gobj;
127 struct virtio_gpu_object *obj;
128
129 BUG_ON(!offset_p);
130 gobj = drm_gem_object_lookup(file_priv, handle);
131 if (gobj == NULL)
132 return -ENOENT;
133 obj = gem_to_virtio_gpu_obj(gobj);
134 *offset_p = virtio_gpu_object_mmap_offset(obj);
135 drm_gem_object_put_unlocked(gobj);
136 return 0;
137}
138
139int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
140 struct drm_file *file)
141{
142 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
143 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
144 struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
145 int r;
146
147 if (!vgdev->has_virgl_3d)
148 return 0;
149
150 r = virtio_gpu_object_reserve(qobj, false);
151 if (r)
152 return r;
153
154 virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
155 qobj->hw_res_handle);
156 virtio_gpu_object_unreserve(qobj);
157 return 0;
158}
159
160void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
161 struct drm_file *file)
162{
163 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
164 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
165 struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
166 int r;
167
168 if (!vgdev->has_virgl_3d)
169 return;
170
171 r = virtio_gpu_object_reserve(qobj, false);
172 if (r)
173 return;
174
175 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
176 qobj->hw_res_handle);
177 virtio_gpu_object_unreserve(qobj);
178}