2 * Copyright (C) 2015 Red Hat, Inc.
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:
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
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.
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>
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>
42 #include "virtgpu_drv.h"
44 static const struct drm_driver driver;
46 static int virtio_gpu_modeset = -1;
48 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
49 module_param_named(modeset, virtio_gpu_modeset, int, 0400);
51 static int virtio_gpu_pci_quirk(struct drm_device *dev)
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);
58 DRM_INFO("pci: %s detected at %s\n",
59 vga ? "virtio-vga" : "virtio-gpu-pci",
62 ret = aperture_remove_conflicting_pci_devices(pdev, driver.name);
70 static int virtio_gpu_probe(struct virtio_device *vdev)
72 struct drm_device *dev;
75 if (drm_firmware_drivers_only() && virtio_gpu_modeset == -1)
78 if (virtio_gpu_modeset == 0)
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.
87 dev = drm_dev_alloc(&driver, vdev->dev.parent);
92 if (dev_is_pci(vdev->dev.parent)) {
93 ret = virtio_gpu_pci_quirk(dev);
98 dma_set_max_seg_size(dev->dev, dma_max_mapping_size(dev->dev) ?: UINT_MAX);
99 ret = virtio_gpu_init(vdev, dev);
103 ret = drm_dev_register(dev, 0);
107 drm_client_setup(vdev->priv, NULL);
112 virtio_gpu_deinit(dev);
118 static void virtio_gpu_remove(struct virtio_device *vdev)
120 struct drm_device *dev = vdev->priv;
123 drm_atomic_helper_shutdown(dev);
124 virtio_gpu_deinit(dev);
128 static void virtio_gpu_config_changed(struct virtio_device *vdev)
130 struct drm_device *dev = vdev->priv;
131 struct virtio_gpu_device *vgdev = dev->dev_private;
133 schedule_work(&vgdev->config_changed_work);
136 static struct virtio_device_id id_table[] = {
137 { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
141 static unsigned int features[] = {
142 #ifdef __LITTLE_ENDIAN
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.
151 VIRTIO_GPU_F_RESOURCE_UUID,
152 VIRTIO_GPU_F_RESOURCE_BLOB,
153 VIRTIO_GPU_F_CONTEXT_INIT,
155 static 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
165 module_virtio_driver(virtio_gpu_driver);
167 MODULE_DEVICE_TABLE(virtio, id_table);
168 MODULE_DESCRIPTION("Virtio GPU driver");
169 MODULE_LICENSE("GPL and additional rights");
172 MODULE_AUTHOR("Alon Levy");
174 DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);
176 static const struct drm_driver driver = {
178 * If KMS is disabled DRIVER_MODESET and DRIVER_ATOMIC are masked
179 * out via drm_device::driver_features:
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,
186 .dumb_create = virtio_gpu_mode_dumb_create,
187 .dumb_map_offset = virtio_gpu_mode_dumb_mmap,
189 DRM_FBDEV_SHMEM_DRIVER_OPS,
191 #if defined(CONFIG_DEBUG_FS)
192 .debugfs_init = virtio_gpu_debugfs_init,
194 .gem_prime_import = virtgpu_gem_prime_import,
195 .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
197 .gem_create_object = virtio_gpu_create_object,
198 .fops = &virtio_gpu_driver_fops,
200 .ioctls = virtio_gpu_ioctls,
201 .num_ioctls = DRM_VIRTIO_NUM_IOCTLS,
206 .major = DRIVER_MAJOR,
207 .minor = DRIVER_MINOR,
208 .patchlevel = DRIVER_PATCHLEVEL,
210 .release = virtio_gpu_release,