Loading...
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/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};