1 /*
2  * Copyright (C) 2015 Red Hat, Inc.
3  * All Rights Reserved.
4  *
5  * Authors:
6  *    Dave Airlie <airlied@redhat.com>
7  *    Gerd Hoffmann <kraxel@redhat.com>
8  *
9  * Permission is hereby granted, free of charge, to any person obtaining a
10  * copy of this software and associated documentation files (the "Software"),
11  * to deal in the Software without restriction, including without limitation
12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13  * and/or sell copies of the Software, and to permit persons to whom the
14  * Software is furnished to do so, subject to the following conditions:
15  *
16  * The above copyright notice and this permission notice (including the next
17  * paragraph) shall be included in all copies or substantial portions of the
18  * Software.
19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
23  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26  * OTHER DEALINGS IN THE SOFTWARE.
27  */
28 
29 #include <linux/module.h>
30 #include <linux/console.h>
31 #include <linux/pci.h>
32 #include "drmP.h"
33 #include "drm/drm.h"
34 
35 #include "virtgpu_drv.h"
36 static struct drm_driver driver;
37 
38 static int virtio_gpu_modeset = -1;
39 
40 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
41 module_param_named(modeset, virtio_gpu_modeset, int, 0400);
42 
43 static int virtio_gpu_probe(struct virtio_device *vdev)
44 {
45 #ifdef CONFIG_VGA_CONSOLE
46 	if (vgacon_text_force() && virtio_gpu_modeset == -1)
47 		return -EINVAL;
48 #endif
49 
50 	if (virtio_gpu_modeset == 0)
51 		return -EINVAL;
52 
53 	return drm_virtio_init(&driver, vdev);
54 }
55 
56 static void virtio_gpu_remove(struct virtio_device *vdev)
57 {
58 	struct drm_device *dev = vdev->priv;
59 	drm_put_dev(dev);
60 }
61 
62 static void virtio_gpu_config_changed(struct virtio_device *vdev)
63 {
64 	struct drm_device *dev = vdev->priv;
65 	struct virtio_gpu_device *vgdev = dev->dev_private;
66 
67 	schedule_work(&vgdev->config_changed_work);
68 }
69 
70 static struct virtio_device_id id_table[] = {
71 	{ VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
72 	{ 0 },
73 };
74 
75 static unsigned int features[] = {
76 };
77 static struct virtio_driver virtio_gpu_driver = {
78 	.feature_table = features,
79 	.feature_table_size = ARRAY_SIZE(features),
80 	.driver.name = KBUILD_MODNAME,
81 	.driver.owner = THIS_MODULE,
82 	.id_table = id_table,
83 	.probe = virtio_gpu_probe,
84 	.remove = virtio_gpu_remove,
85 	.config_changed = virtio_gpu_config_changed
86 };
87 
88 module_virtio_driver(virtio_gpu_driver);
89 
90 MODULE_DEVICE_TABLE(virtio, id_table);
91 MODULE_DESCRIPTION("Virtio GPU driver");
92 MODULE_LICENSE("GPL and additional rights");
93 MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
94 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
95 MODULE_AUTHOR("Alon Levy");
96 
97 static const struct file_operations virtio_gpu_driver_fops = {
98 	.owner = THIS_MODULE,
99 	.open = drm_open,
100 	.mmap = virtio_gpu_mmap,
101 	.poll = drm_poll,
102 	.read = drm_read,
103 	.unlocked_ioctl	= drm_ioctl,
104 	.release = drm_release,
105 #ifdef CONFIG_COMPAT
106 	.compat_ioctl = drm_compat_ioctl,
107 #endif
108 	.llseek = noop_llseek,
109 };
110 
111 
112 static struct drm_driver driver = {
113 	.driver_features = DRIVER_MODESET | DRIVER_GEM,
114 	.set_busid = drm_virtio_set_busid,
115 	.load = virtio_gpu_driver_load,
116 	.unload = virtio_gpu_driver_unload,
117 
118 	.dumb_create = virtio_gpu_mode_dumb_create,
119 	.dumb_map_offset = virtio_gpu_mode_dumb_mmap,
120 	.dumb_destroy = virtio_gpu_mode_dumb_destroy,
121 
122 #if defined(CONFIG_DEBUG_FS)
123 	.debugfs_init = virtio_gpu_debugfs_init,
124 	.debugfs_cleanup = virtio_gpu_debugfs_takedown,
125 #endif
126 
127 	.gem_free_object = virtio_gpu_gem_free_object,
128 	.fops = &virtio_gpu_driver_fops,
129 
130 	.name = DRIVER_NAME,
131 	.desc = DRIVER_DESC,
132 	.date = DRIVER_DATE,
133 	.major = DRIVER_MAJOR,
134 	.minor = DRIVER_MINOR,
135 	.patchlevel = DRIVER_PATCHLEVEL,
136 };
137