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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/pci.h>
31#include <linux/poll.h>
32#include <linux/wait.h>
33
34#include <drm/drm.h>
35#include <drm/drm_aperture.h>
36#include <drm/drm_atomic_helper.h>
37#include <drm/drm_drv.h>
38#include <drm/drm_fbdev_generic.h>
39#include <drm/drm_file.h>
40
41#include "virtgpu_drv.h"
42
43static const struct drm_driver driver;
44
45static int virtio_gpu_modeset = -1;
46
47MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
48module_param_named(modeset, virtio_gpu_modeset, int, 0400);
49
50static int virtio_gpu_pci_quirk(struct drm_device *dev)
51{
52 struct pci_dev *pdev = to_pci_dev(dev->dev);
53 const char *pname = dev_name(&pdev->dev);
54 bool vga = pci_is_vga(pdev);
55 int ret;
56
57 DRM_INFO("pci: %s detected at %s\n",
58 vga ? "virtio-vga" : "virtio-gpu-pci",
59 pname);
60 if (vga) {
61 ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &driver);
62 if (ret)
63 return ret;
64 }
65
66 return 0;
67}
68
69static int virtio_gpu_probe(struct virtio_device *vdev)
70{
71 struct drm_device *dev;
72 int ret;
73
74 if (drm_firmware_drivers_only() && virtio_gpu_modeset == -1)
75 return -EINVAL;
76
77 if (virtio_gpu_modeset == 0)
78 return -EINVAL;
79
80 /*
81 * The virtio-gpu device is a virtual device that doesn't have DMA
82 * ops assigned to it, nor DMA mask set and etc. Its parent device
83 * is actual GPU device we want to use it for the DRM's device in
84 * order to benefit from using generic DRM APIs.
85 */
86 dev = drm_dev_alloc(&driver, vdev->dev.parent);
87 if (IS_ERR(dev))
88 return PTR_ERR(dev);
89 vdev->priv = dev;
90
91 if (dev_is_pci(vdev->dev.parent)) {
92 ret = virtio_gpu_pci_quirk(dev);
93 if (ret)
94 goto err_free;
95 }
96
97 dma_set_max_seg_size(dev->dev, dma_max_mapping_size(dev->dev) ?: UINT_MAX);
98 ret = virtio_gpu_init(vdev, dev);
99 if (ret)
100 goto err_free;
101
102 ret = drm_dev_register(dev, 0);
103 if (ret)
104 goto err_deinit;
105
106 drm_fbdev_generic_setup(vdev->priv, 32);
107 return 0;
108
109err_deinit:
110 virtio_gpu_deinit(dev);
111err_free:
112 drm_dev_put(dev);
113 return ret;
114}
115
116static void virtio_gpu_remove(struct virtio_device *vdev)
117{
118 struct drm_device *dev = vdev->priv;
119
120 drm_dev_unplug(dev);
121 drm_atomic_helper_shutdown(dev);
122 virtio_gpu_deinit(dev);
123 drm_dev_put(dev);
124}
125
126static void virtio_gpu_config_changed(struct virtio_device *vdev)
127{
128 struct drm_device *dev = vdev->priv;
129 struct virtio_gpu_device *vgdev = dev->dev_private;
130
131 schedule_work(&vgdev->config_changed_work);
132}
133
134static struct virtio_device_id id_table[] = {
135 { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
136 { 0 },
137};
138
139static unsigned int features[] = {
140#ifdef __LITTLE_ENDIAN
141 /*
142 * Gallium command stream send by virgl is native endian.
143 * Because of that we only support little endian guests on
144 * little endian hosts.
145 */
146 VIRTIO_GPU_F_VIRGL,
147#endif
148 VIRTIO_GPU_F_EDID,
149 VIRTIO_GPU_F_RESOURCE_UUID,
150 VIRTIO_GPU_F_RESOURCE_BLOB,
151 VIRTIO_GPU_F_CONTEXT_INIT,
152};
153static struct virtio_driver virtio_gpu_driver = {
154 .feature_table = features,
155 .feature_table_size = ARRAY_SIZE(features),
156 .driver.name = KBUILD_MODNAME,
157 .driver.owner = THIS_MODULE,
158 .id_table = id_table,
159 .probe = virtio_gpu_probe,
160 .remove = virtio_gpu_remove,
161 .config_changed = virtio_gpu_config_changed
162};
163
164module_virtio_driver(virtio_gpu_driver);
165
166MODULE_DEVICE_TABLE(virtio, id_table);
167MODULE_DESCRIPTION("Virtio GPU driver");
168MODULE_LICENSE("GPL and additional rights");
169MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
170MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
171MODULE_AUTHOR("Alon Levy");
172
173DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);
174
175static const struct drm_driver driver = {
176 /*
177 * If KMS is disabled DRIVER_MODESET and DRIVER_ATOMIC are masked
178 * out via drm_device::driver_features:
179 */
180 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC |
181 DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE | DRIVER_CURSOR_HOTSPOT,
182 .open = virtio_gpu_driver_open,
183 .postclose = virtio_gpu_driver_postclose,
184
185 .dumb_create = virtio_gpu_mode_dumb_create,
186 .dumb_map_offset = virtio_gpu_mode_dumb_mmap,
187
188#if defined(CONFIG_DEBUG_FS)
189 .debugfs_init = virtio_gpu_debugfs_init,
190#endif
191 .gem_prime_import = virtgpu_gem_prime_import,
192 .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
193
194 .gem_create_object = virtio_gpu_create_object,
195 .fops = &virtio_gpu_driver_fops,
196
197 .ioctls = virtio_gpu_ioctls,
198 .num_ioctls = DRM_VIRTIO_NUM_IOCTLS,
199
200 .name = DRIVER_NAME,
201 .desc = DRIVER_DESC,
202 .date = DRIVER_DATE,
203 .major = DRIVER_MAJOR,
204 .minor = DRIVER_MINOR,
205 .patchlevel = DRIVER_PATCHLEVEL,
206
207 .release = virtio_gpu_release,
208};
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/aperture.h>
30#include <linux/module.h>
31#include <linux/pci.h>
32#include <linux/poll.h>
33#include <linux/wait.h>
34
35#include <drm/drm.h>
36#include <drm/drm_atomic_helper.h>
37#include <drm/drm_client_setup.h>
38#include <drm/drm_drv.h>
39#include <drm/drm_fbdev_shmem.h>
40#include <drm/drm_file.h>
41
42#include "virtgpu_drv.h"
43
44static const struct drm_driver driver;
45
46static int virtio_gpu_modeset = -1;
47
48MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
49module_param_named(modeset, virtio_gpu_modeset, int, 0400);
50
51static int virtio_gpu_pci_quirk(struct drm_device *dev)
52{
53 struct pci_dev *pdev = to_pci_dev(dev->dev);
54 const char *pname = dev_name(&pdev->dev);
55 bool vga = pci_is_vga(pdev);
56 int ret;
57
58 DRM_INFO("pci: %s detected at %s\n",
59 vga ? "virtio-vga" : "virtio-gpu-pci",
60 pname);
61 if (vga) {
62 ret = aperture_remove_conflicting_pci_devices(pdev, driver.name);
63 if (ret)
64 return ret;
65 }
66
67 return 0;
68}
69
70static int virtio_gpu_probe(struct virtio_device *vdev)
71{
72 struct drm_device *dev;
73 int ret;
74
75 if (drm_firmware_drivers_only() && virtio_gpu_modeset == -1)
76 return -EINVAL;
77
78 if (virtio_gpu_modeset == 0)
79 return -EINVAL;
80
81 /*
82 * The virtio-gpu device is a virtual device that doesn't have DMA
83 * ops assigned to it, nor DMA mask set and etc. Its parent device
84 * is actual GPU device we want to use it for the DRM's device in
85 * order to benefit from using generic DRM APIs.
86 */
87 dev = drm_dev_alloc(&driver, vdev->dev.parent);
88 if (IS_ERR(dev))
89 return PTR_ERR(dev);
90 vdev->priv = dev;
91
92 if (dev_is_pci(vdev->dev.parent)) {
93 ret = virtio_gpu_pci_quirk(dev);
94 if (ret)
95 goto err_free;
96 }
97
98 dma_set_max_seg_size(dev->dev, dma_max_mapping_size(dev->dev) ?: UINT_MAX);
99 ret = virtio_gpu_init(vdev, dev);
100 if (ret)
101 goto err_free;
102
103 ret = drm_dev_register(dev, 0);
104 if (ret)
105 goto err_deinit;
106
107 drm_client_setup(vdev->priv, NULL);
108
109 return 0;
110
111err_deinit:
112 virtio_gpu_deinit(dev);
113err_free:
114 drm_dev_put(dev);
115 return ret;
116}
117
118static void virtio_gpu_remove(struct virtio_device *vdev)
119{
120 struct drm_device *dev = vdev->priv;
121
122 drm_dev_unplug(dev);
123 drm_atomic_helper_shutdown(dev);
124 virtio_gpu_deinit(dev);
125 drm_dev_put(dev);
126}
127
128static void virtio_gpu_config_changed(struct virtio_device *vdev)
129{
130 struct drm_device *dev = vdev->priv;
131 struct virtio_gpu_device *vgdev = dev->dev_private;
132
133 schedule_work(&vgdev->config_changed_work);
134}
135
136static struct virtio_device_id id_table[] = {
137 { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
138 { 0 },
139};
140
141static unsigned int features[] = {
142#ifdef __LITTLE_ENDIAN
143 /*
144 * Gallium command stream send by virgl is native endian.
145 * Because of that we only support little endian guests on
146 * little endian hosts.
147 */
148 VIRTIO_GPU_F_VIRGL,
149#endif
150 VIRTIO_GPU_F_EDID,
151 VIRTIO_GPU_F_RESOURCE_UUID,
152 VIRTIO_GPU_F_RESOURCE_BLOB,
153 VIRTIO_GPU_F_CONTEXT_INIT,
154};
155static struct virtio_driver virtio_gpu_driver = {
156 .feature_table = features,
157 .feature_table_size = ARRAY_SIZE(features),
158 .driver.name = KBUILD_MODNAME,
159 .id_table = id_table,
160 .probe = virtio_gpu_probe,
161 .remove = virtio_gpu_remove,
162 .config_changed = virtio_gpu_config_changed
163};
164
165module_virtio_driver(virtio_gpu_driver);
166
167MODULE_DEVICE_TABLE(virtio, id_table);
168MODULE_DESCRIPTION("Virtio GPU driver");
169MODULE_LICENSE("GPL and additional rights");
170MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
171MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
172MODULE_AUTHOR("Alon Levy");
173
174DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);
175
176static const struct drm_driver driver = {
177 /*
178 * If KMS is disabled DRIVER_MODESET and DRIVER_ATOMIC are masked
179 * out via drm_device::driver_features:
180 */
181 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC |
182 DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE | DRIVER_CURSOR_HOTSPOT,
183 .open = virtio_gpu_driver_open,
184 .postclose = virtio_gpu_driver_postclose,
185
186 .dumb_create = virtio_gpu_mode_dumb_create,
187 .dumb_map_offset = virtio_gpu_mode_dumb_mmap,
188
189 DRM_FBDEV_SHMEM_DRIVER_OPS,
190
191#if defined(CONFIG_DEBUG_FS)
192 .debugfs_init = virtio_gpu_debugfs_init,
193#endif
194 .gem_prime_import = virtgpu_gem_prime_import,
195 .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
196
197 .gem_create_object = virtio_gpu_create_object,
198 .fops = &virtio_gpu_driver_fops,
199
200 .ioctls = virtio_gpu_ioctls,
201 .num_ioctls = DRM_VIRTIO_NUM_IOCTLS,
202
203 .name = DRIVER_NAME,
204 .desc = DRIVER_DESC,
205 .date = DRIVER_DATE,
206 .major = DRIVER_MAJOR,
207 .minor = DRIVER_MINOR,
208 .patchlevel = DRIVER_PATCHLEVEL,
209
210 .release = virtio_gpu_release,
211};