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
virtio_gpu_gem_free_object(struct drm_gem_object * gem_obj)29 void 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
virtio_gpu_alloc_object(struct drm_device * dev,size_t size,bool kernel,bool pinned)37 struct 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
virtio_gpu_gem_create(struct drm_file * file,struct drm_device * dev,uint64_t size,struct drm_gem_object ** obj_p,uint32_t * handle_p)52 int 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
virtio_gpu_mode_dumb_create(struct drm_file * file_priv,struct drm_device * dev,struct drm_mode_create_dumb * args)81 int 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 resid;
91 uint32_t format;
92
93 pitch = args->width * ((args->bpp + 1) / 8);
94 args->size = pitch * args->height;
95 args->size = ALIGN(args->size, PAGE_SIZE);
96
97 ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj,
98 &args->handle);
99 if (ret)
100 goto fail;
101
102 format = virtio_gpu_translate_format(DRM_FORMAT_XRGB8888);
103 virtio_gpu_resource_id_get(vgdev, &resid);
104 virtio_gpu_cmd_create_resource(vgdev, resid, format,
105 args->width, args->height);
106
107 /* attach the object to the resource */
108 obj = gem_to_virtio_gpu_obj(gobj);
109 ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
110 if (ret)
111 goto fail;
112
113 obj->dumb = true;
114 args->pitch = pitch;
115 return ret;
116
117 fail:
118 return ret;
119 }
120
virtio_gpu_mode_dumb_mmap(struct drm_file * file_priv,struct drm_device * dev,uint32_t handle,uint64_t * offset_p)121 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
122 struct drm_device *dev,
123 uint32_t handle, uint64_t *offset_p)
124 {
125 struct drm_gem_object *gobj;
126 struct virtio_gpu_object *obj;
127
128 BUG_ON(!offset_p);
129 gobj = drm_gem_object_lookup(file_priv, handle);
130 if (gobj == NULL)
131 return -ENOENT;
132 obj = gem_to_virtio_gpu_obj(gobj);
133 *offset_p = virtio_gpu_object_mmap_offset(obj);
134 drm_gem_object_put_unlocked(gobj);
135 return 0;
136 }
137
virtio_gpu_gem_object_open(struct drm_gem_object * obj,struct drm_file * file)138 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
139 struct drm_file *file)
140 {
141 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
142 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
143 struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
144 int r;
145
146 if (!vgdev->has_virgl_3d)
147 return 0;
148
149 r = virtio_gpu_object_reserve(qobj, false);
150 if (r)
151 return r;
152
153 virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
154 qobj->hw_res_handle);
155 virtio_gpu_object_unreserve(qobj);
156 return 0;
157 }
158
virtio_gpu_gem_object_close(struct drm_gem_object * obj,struct drm_file * file)159 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
160 struct drm_file *file)
161 {
162 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
163 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
164 struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
165 int r;
166
167 if (!vgdev->has_virgl_3d)
168 return;
169
170 r = virtio_gpu_object_reserve(qobj, false);
171 if (r)
172 return;
173
174 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
175 qobj->hw_res_handle);
176 virtio_gpu_object_unreserve(qobj);
177 }
178
