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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/*
* Copyright (C) 2015 Red Hat, Inc.
* All Rights Reserved.
*
* Authors:
* Dave Airlie <airlied@redhat.com>
* Gerd Hoffmann <kraxel@redhat.com>
*
* 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
* VA LINUX SYSTEMS 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 <linux/module.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <drm/drm.h>
#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include "virtgpu_drv.h"
static const struct drm_driver driver;
static int virtio_gpu_modeset = -1;
MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
module_param_named(modeset, virtio_gpu_modeset, int, 0400);
static int virtio_gpu_pci_quirk(struct drm_device *dev, struct virtio_device *vdev)
{
struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
const char *pname = dev_name(&pdev->dev);
bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
char unique[20];
int ret;
DRM_INFO("pci: %s detected at %s\n",
vga ? "virtio-vga" : "virtio-gpu-pci",
pname);
if (vga) {
ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "virtiodrmfb");
if (ret)
return ret;
}
/*
* Normally the drm_dev_set_unique() call is done by core DRM.
* The following comment covers, why virtio cannot rely on it.
*
* Unlike the other virtual GPU drivers, virtio abstracts the
* underlying bus type by using struct virtio_device.
*
* Hence the dev_is_pci() check, used in core DRM, will fail
* and the unique returned will be the virtio_device "virtio0",
* while a "pci:..." one is required.
*
* A few other ideas were considered:
* - Extend the dev_is_pci() check [in drm_set_busid] to
* consider virtio.
* Seems like a bigger hack than what we have already.
*
* - Point drm_device::dev to the parent of the virtio_device
* Semantic changes:
* * Using the wrong device for i2c, framebuffer_alloc and
* prime import.
* Visual changes:
* * Helpers such as DRM_DEV_ERROR, dev_info, drm_printer,
* will print the wrong information.
*
* We could address the latter issues, by introducing
* drm_device::bus_dev, ... which would be used solely for this.
*
* So for the moment keep things as-is, with a bulky comment
* for the next person who feels like removing this
* drm_dev_set_unique() quirk.
*/
snprintf(unique, sizeof(unique), "pci:%s", pname);
return drm_dev_set_unique(dev, unique);
}
static int virtio_gpu_probe(struct virtio_device *vdev)
{
struct drm_device *dev;
int ret;
if (vgacon_text_force() && virtio_gpu_modeset == -1)
return -EINVAL;
if (virtio_gpu_modeset == 0)
return -EINVAL;
dev = drm_dev_alloc(&driver, &vdev->dev);
if (IS_ERR(dev))
return PTR_ERR(dev);
vdev->priv = dev;
if (!strcmp(vdev->dev.parent->bus->name, "pci")) {
ret = virtio_gpu_pci_quirk(dev, vdev);
if (ret)
goto err_free;
}
ret = virtio_gpu_init(dev);
if (ret)
goto err_free;
ret = drm_dev_register(dev, 0);
if (ret)
goto err_free;
drm_fbdev_generic_setup(vdev->priv, 32);
return 0;
err_free:
drm_dev_put(dev);
return ret;
}
static void virtio_gpu_remove(struct virtio_device *vdev)
{
struct drm_device *dev = vdev->priv;
drm_dev_unplug(dev);
drm_atomic_helper_shutdown(dev);
virtio_gpu_deinit(dev);
drm_dev_put(dev);
}
static void virtio_gpu_config_changed(struct virtio_device *vdev)
{
struct drm_device *dev = vdev->priv;
struct virtio_gpu_device *vgdev = dev->dev_private;
schedule_work(&vgdev->config_changed_work);
}
static struct virtio_device_id id_table[] = {
{ VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
{ 0 },
};
static unsigned int features[] = {
#ifdef __LITTLE_ENDIAN
/*
* Gallium command stream send by virgl is native endian.
* Because of that we only support little endian guests on
* little endian hosts.
*/
VIRTIO_GPU_F_VIRGL,
#endif
VIRTIO_GPU_F_EDID,
VIRTIO_GPU_F_RESOURCE_UUID,
VIRTIO_GPU_F_RESOURCE_BLOB,
};
static struct virtio_driver virtio_gpu_driver = {
.feature_table = features,
.feature_table_size = ARRAY_SIZE(features),
.driver.name = KBUILD_MODNAME,
.driver.owner = THIS_MODULE,
.id_table = id_table,
.probe = virtio_gpu_probe,
.remove = virtio_gpu_remove,
.config_changed = virtio_gpu_config_changed
};
module_virtio_driver(virtio_gpu_driver);
MODULE_DEVICE_TABLE(virtio, id_table);
MODULE_DESCRIPTION("Virtio GPU driver");
MODULE_LICENSE("GPL and additional rights");
MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
MODULE_AUTHOR("Alon Levy");
DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);
static const struct drm_driver driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC,
.open = virtio_gpu_driver_open,
.postclose = virtio_gpu_driver_postclose,
.dumb_create = virtio_gpu_mode_dumb_create,
.dumb_map_offset = virtio_gpu_mode_dumb_mmap,
#if defined(CONFIG_DEBUG_FS)
.debugfs_init = virtio_gpu_debugfs_init,
#endif
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_mmap = drm_gem_prime_mmap,
.gem_prime_import = virtgpu_gem_prime_import,
.gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
.gem_create_object = virtio_gpu_create_object,
.fops = &virtio_gpu_driver_fops,
.ioctls = virtio_gpu_ioctls,
.num_ioctls = DRM_VIRTIO_NUM_IOCTLS,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
.release = virtio_gpu_release,
};
|
