summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/virtio/virtgpu_gem.c
blob: 336a57fd6d5d6821591b7f15b91b270a14d7c2f8 (plain)
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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/*
 * Copyright (C) 2015 Red Hat, Inc.
 * All Rights Reserved.
 *
 * 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 (including the
 * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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.
 */

#include <drm/drmP.h>
#include "virtgpu_drv.h"

void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
{
	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj);

	if (obj)
		virtio_gpu_object_unref(&obj);
}

struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
						  size_t size, bool kernel,
						  bool pinned)
{
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_object *obj;
	int ret;

	ret = virtio_gpu_object_create(vgdev, size, kernel, pinned, &obj);
	if (ret)
		return ERR_PTR(ret);

	return obj;
}

int 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)
{
	struct virtio_gpu_object *obj;
	int ret;
	u32 handle;

	obj = virtio_gpu_alloc_object(dev, size, false, false);
	if (IS_ERR(obj))
		return PTR_ERR(obj);

	ret = drm_gem_handle_create(file, &obj->gem_base, &handle);
	if (ret) {
		drm_gem_object_release(&obj->gem_base);
		return ret;
	}

	*obj_p = &obj->gem_base;

	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(&obj->gem_base);

	*handle_p = handle;
	return 0;
}

int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
				struct drm_device *dev,
				struct drm_mode_create_dumb *args)
{
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct drm_gem_object *gobj;
	struct virtio_gpu_object *obj;
	int ret;
	uint32_t pitch;
	uint32_t resid;

	pitch = args->width * ((args->bpp + 1) / 8);
	args->size = pitch * args->height;
	args->size = ALIGN(args->size, PAGE_SIZE);

	ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj,
				    &args->handle);
	if (ret)
		goto fail;

	virtio_gpu_resource_id_get(vgdev, &resid);
	virtio_gpu_cmd_create_resource(vgdev, resid,
				       2, args->width, args->height);

	/* attach the object to the resource */
	obj = gem_to_virtio_gpu_obj(gobj);
	ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
	if (ret)
		goto fail;

	obj->dumb = true;
	args->pitch = pitch;
	return ret;

fail:
	return ret;
}

int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
				 struct drm_device *dev,
				 uint32_t handle)
{
	return drm_gem_handle_delete(file_priv, handle);
}

int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
			      struct drm_device *dev,
			      uint32_t handle, uint64_t *offset_p)
{
	struct drm_gem_object *gobj;
	struct virtio_gpu_object *obj;
	BUG_ON(!offset_p);
	gobj = drm_gem_object_lookup(file_priv, handle);
	if (gobj == NULL)
		return -ENOENT;
	obj = gem_to_virtio_gpu_obj(gobj);
	*offset_p = virtio_gpu_object_mmap_offset(obj);
	drm_gem_object_unreference_unlocked(gobj);
	return 0;
}

int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
			       struct drm_file *file)
{
	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
	int r;

	if (!vgdev->has_virgl_3d)
		return 0;

	r = virtio_gpu_object_reserve(qobj, false);
	if (r)
		return r;

	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
					       qobj->hw_res_handle);
	virtio_gpu_object_unreserve(qobj);
	return 0;
}

void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
				 struct drm_file *file)
{
	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
	int r;

	if (!vgdev->has_virgl_3d)
		return;

	r = virtio_gpu_object_reserve(qobj, false);
	if (r)
		return;

	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
						qobj->hw_res_handle);
	virtio_gpu_object_unreserve(qobj);
}