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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"
36static struct drm_driver driver;
37
38static int virtio_gpu_modeset = -1;
39
40MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
41module_param_named(modeset, virtio_gpu_modeset, int, 0400);
42
43static 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
56static void virtio_gpu_remove(struct virtio_device *vdev)
57{
58 struct drm_device *dev = vdev->priv;
59 drm_put_dev(dev);
60}
61
62static 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
70static struct virtio_device_id id_table[] = {
71 { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
72 { 0 },
73};
74
75static unsigned int features[] = {
76#ifdef __LITTLE_ENDIAN
77 /*
78 * Gallium command stream send by virgl is native endian.
79 * Because of that we only support little endian guests on
80 * little endian hosts.
81 */
82 VIRTIO_GPU_F_VIRGL,
83#endif
84};
85static struct virtio_driver virtio_gpu_driver = {
86 .feature_table = features,
87 .feature_table_size = ARRAY_SIZE(features),
88 .driver.name = KBUILD_MODNAME,
89 .driver.owner = THIS_MODULE,
90 .id_table = id_table,
91 .probe = virtio_gpu_probe,
92 .remove = virtio_gpu_remove,
93 .config_changed = virtio_gpu_config_changed
94};
95
96module_virtio_driver(virtio_gpu_driver);
97
98MODULE_DEVICE_TABLE(virtio, id_table);
99MODULE_DESCRIPTION("Virtio GPU driver");
100MODULE_LICENSE("GPL and additional rights");
101MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
102MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
103MODULE_AUTHOR("Alon Levy");
104
105static const struct file_operations virtio_gpu_driver_fops = {
106 .owner = THIS_MODULE,
107 .open = drm_open,
108 .mmap = virtio_gpu_mmap,
109 .poll = drm_poll,
110 .read = drm_read,
111 .unlocked_ioctl = drm_ioctl,
112 .release = drm_release,
113#ifdef CONFIG_COMPAT
114 .compat_ioctl = drm_compat_ioctl,
115#endif
116 .llseek = noop_llseek,
117};
118
119
120static struct drm_driver driver = {
121 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_RENDER | DRIVER_ATOMIC,
122 .set_busid = drm_virtio_set_busid,
123 .load = virtio_gpu_driver_load,
124 .unload = virtio_gpu_driver_unload,
125 .open = virtio_gpu_driver_open,
126 .postclose = virtio_gpu_driver_postclose,
127
128 .dumb_create = virtio_gpu_mode_dumb_create,
129 .dumb_map_offset = virtio_gpu_mode_dumb_mmap,
130 .dumb_destroy = virtio_gpu_mode_dumb_destroy,
131
132#if defined(CONFIG_DEBUG_FS)
133 .debugfs_init = virtio_gpu_debugfs_init,
134 .debugfs_cleanup = virtio_gpu_debugfs_takedown,
135#endif
136 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
137 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
138 .gem_prime_export = drm_gem_prime_export,
139 .gem_prime_import = drm_gem_prime_import,
140 .gem_prime_pin = virtgpu_gem_prime_pin,
141 .gem_prime_unpin = virtgpu_gem_prime_unpin,
142 .gem_prime_get_sg_table = virtgpu_gem_prime_get_sg_table,
143 .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
144 .gem_prime_vmap = virtgpu_gem_prime_vmap,
145 .gem_prime_vunmap = virtgpu_gem_prime_vunmap,
146 .gem_prime_mmap = virtgpu_gem_prime_mmap,
147
148 .gem_free_object = virtio_gpu_gem_free_object,
149 .gem_open_object = virtio_gpu_gem_object_open,
150 .gem_close_object = virtio_gpu_gem_object_close,
151 .fops = &virtio_gpu_driver_fops,
152
153 .ioctls = virtio_gpu_ioctls,
154 .num_ioctls = DRM_VIRTIO_NUM_IOCTLS,
155
156 .name = DRIVER_NAME,
157 .desc = DRIVER_DESC,
158 .date = DRIVER_DATE,
159 .major = DRIVER_MAJOR,
160 .minor = DRIVER_MINOR,
161 .patchlevel = DRIVER_PATCHLEVEL,
162};
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
33#include <drm/drm.h>
34#include <drm/drm_atomic_helper.h>
35#include <drm/drm_drv.h>
36#include <drm/drm_file.h>
37
38#include "virtgpu_drv.h"
39
40static struct drm_driver driver;
41
42static int virtio_gpu_modeset = -1;
43
44MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
45module_param_named(modeset, virtio_gpu_modeset, int, 0400);
46
47static int virtio_gpu_pci_quirk(struct drm_device *dev, struct virtio_device *vdev)
48{
49 struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
50 const char *pname = dev_name(&pdev->dev);
51 bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
52 char unique[20];
53
54 DRM_INFO("pci: %s detected at %s\n",
55 vga ? "virtio-vga" : "virtio-gpu-pci",
56 pname);
57 dev->pdev = pdev;
58 if (vga)
59 drm_fb_helper_remove_conflicting_pci_framebuffers(pdev,
60 "virtiodrmfb");
61
62 /*
63 * Normally the drm_dev_set_unique() call is done by core DRM.
64 * The following comment covers, why virtio cannot rely on it.
65 *
66 * Unlike the other virtual GPU drivers, virtio abstracts the
67 * underlying bus type by using struct virtio_device.
68 *
69 * Hence the dev_is_pci() check, used in core DRM, will fail
70 * and the unique returned will be the virtio_device "virtio0",
71 * while a "pci:..." one is required.
72 *
73 * A few other ideas were considered:
74 * - Extend the dev_is_pci() check [in drm_set_busid] to
75 * consider virtio.
76 * Seems like a bigger hack than what we have already.
77 *
78 * - Point drm_device::dev to the parent of the virtio_device
79 * Semantic changes:
80 * * Using the wrong device for i2c, framebuffer_alloc and
81 * prime import.
82 * Visual changes:
83 * * Helpers such as DRM_DEV_ERROR, dev_info, drm_printer,
84 * will print the wrong information.
85 *
86 * We could address the latter issues, by introducing
87 * drm_device::bus_dev, ... which would be used solely for this.
88 *
89 * So for the moment keep things as-is, with a bulky comment
90 * for the next person who feels like removing this
91 * drm_dev_set_unique() quirk.
92 */
93 snprintf(unique, sizeof(unique), "pci:%s", pname);
94 return drm_dev_set_unique(dev, unique);
95}
96
97static int virtio_gpu_probe(struct virtio_device *vdev)
98{
99 struct drm_device *dev;
100 int ret;
101
102 if (vgacon_text_force() && virtio_gpu_modeset == -1)
103 return -EINVAL;
104
105 if (virtio_gpu_modeset == 0)
106 return -EINVAL;
107
108 dev = drm_dev_alloc(&driver, &vdev->dev);
109 if (IS_ERR(dev))
110 return PTR_ERR(dev);
111 vdev->priv = dev;
112
113 if (!strcmp(vdev->dev.parent->bus->name, "pci")) {
114 ret = virtio_gpu_pci_quirk(dev, vdev);
115 if (ret)
116 goto err_free;
117 }
118
119 ret = virtio_gpu_init(dev);
120 if (ret)
121 goto err_free;
122
123 ret = drm_dev_register(dev, 0);
124 if (ret)
125 goto err_free;
126
127 drm_fbdev_generic_setup(vdev->priv, 32);
128 return 0;
129
130err_free:
131 drm_dev_put(dev);
132 return ret;
133}
134
135static void virtio_gpu_remove(struct virtio_device *vdev)
136{
137 struct drm_device *dev = vdev->priv;
138
139 drm_dev_unplug(dev);
140 drm_atomic_helper_shutdown(dev);
141 virtio_gpu_deinit(dev);
142 drm_dev_put(dev);
143}
144
145static void virtio_gpu_config_changed(struct virtio_device *vdev)
146{
147 struct drm_device *dev = vdev->priv;
148 struct virtio_gpu_device *vgdev = dev->dev_private;
149
150 schedule_work(&vgdev->config_changed_work);
151}
152
153static struct virtio_device_id id_table[] = {
154 { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
155 { 0 },
156};
157
158static unsigned int features[] = {
159#ifdef __LITTLE_ENDIAN
160 /*
161 * Gallium command stream send by virgl is native endian.
162 * Because of that we only support little endian guests on
163 * little endian hosts.
164 */
165 VIRTIO_GPU_F_VIRGL,
166#endif
167 VIRTIO_GPU_F_EDID,
168};
169static struct virtio_driver virtio_gpu_driver = {
170 .feature_table = features,
171 .feature_table_size = ARRAY_SIZE(features),
172 .driver.name = KBUILD_MODNAME,
173 .driver.owner = THIS_MODULE,
174 .id_table = id_table,
175 .probe = virtio_gpu_probe,
176 .remove = virtio_gpu_remove,
177 .config_changed = virtio_gpu_config_changed
178};
179
180module_virtio_driver(virtio_gpu_driver);
181
182MODULE_DEVICE_TABLE(virtio, id_table);
183MODULE_DESCRIPTION("Virtio GPU driver");
184MODULE_LICENSE("GPL and additional rights");
185MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
186MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
187MODULE_AUTHOR("Alon Levy");
188
189DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);
190
191static struct drm_driver driver = {
192 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC,
193 .open = virtio_gpu_driver_open,
194 .postclose = virtio_gpu_driver_postclose,
195
196 .dumb_create = virtio_gpu_mode_dumb_create,
197 .dumb_map_offset = virtio_gpu_mode_dumb_mmap,
198
199#if defined(CONFIG_DEBUG_FS)
200 .debugfs_init = virtio_gpu_debugfs_init,
201#endif
202 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
203 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
204 .gem_prime_mmap = drm_gem_prime_mmap,
205 .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
206
207 .gem_create_object = virtio_gpu_create_object,
208 .fops = &virtio_gpu_driver_fops,
209
210 .ioctls = virtio_gpu_ioctls,
211 .num_ioctls = DRM_VIRTIO_NUM_IOCTLS,
212
213 .name = DRIVER_NAME,
214 .desc = DRIVER_DESC,
215 .date = DRIVER_DATE,
216 .major = DRIVER_MAJOR,
217 .minor = DRIVER_MINOR,
218 .patchlevel = DRIVER_PATCHLEVEL,
219
220 .release = virtio_gpu_release,
221};