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	if (vgacon_text_force() && virtio_gpu_modeset == -1)
 46		return -EINVAL;
 47
 48	if (virtio_gpu_modeset == 0)
 49		return -EINVAL;
 50
 51	return drm_virtio_init(&driver, vdev);
 52}
 53
 54static void virtio_gpu_remove(struct virtio_device *vdev)
 55{
 56	struct drm_device *dev = vdev->priv;
 57	drm_put_dev(dev);
 58}
 59
 60static void virtio_gpu_config_changed(struct virtio_device *vdev)
 61{
 62	struct drm_device *dev = vdev->priv;
 63	struct virtio_gpu_device *vgdev = dev->dev_private;
 64
 65	schedule_work(&vgdev->config_changed_work);
 66}
 67
 68static struct virtio_device_id id_table[] = {
 69	{ VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
 70	{ 0 },
 71};
 72
 73static unsigned int features[] = {
 74#ifdef __LITTLE_ENDIAN
 75	/*
 76	 * Gallium command stream send by virgl is native endian.
 77	 * Because of that we only support little endian guests on
 78	 * little endian hosts.
 79	 */
 80	VIRTIO_GPU_F_VIRGL,
 81#endif
 82};
 83static struct virtio_driver virtio_gpu_driver = {
 84	.feature_table = features,
 85	.feature_table_size = ARRAY_SIZE(features),
 86	.driver.name = KBUILD_MODNAME,
 87	.driver.owner = THIS_MODULE,
 88	.id_table = id_table,
 89	.probe = virtio_gpu_probe,
 90	.remove = virtio_gpu_remove,
 91	.config_changed = virtio_gpu_config_changed
 92};
 93
 94module_virtio_driver(virtio_gpu_driver);
 95
 96MODULE_DEVICE_TABLE(virtio, id_table);
 97MODULE_DESCRIPTION("Virtio GPU driver");
 98MODULE_LICENSE("GPL and additional rights");
 99MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
100MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
101MODULE_AUTHOR("Alon Levy");
102
103static const struct file_operations virtio_gpu_driver_fops = {
104	.owner = THIS_MODULE,
105	.open = drm_open,
106	.mmap = virtio_gpu_mmap,
107	.poll = drm_poll,
108	.read = drm_read,
109	.unlocked_ioctl	= drm_ioctl,
110	.release = drm_release,
111	.compat_ioctl = drm_compat_ioctl,
112	.llseek = noop_llseek,
113};
114
115
116static struct drm_driver driver = {
117	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_RENDER | DRIVER_ATOMIC,
118	.load = virtio_gpu_driver_load,
119	.unload = virtio_gpu_driver_unload,
120	.open = virtio_gpu_driver_open,
121	.postclose = virtio_gpu_driver_postclose,
122
123	.dumb_create = virtio_gpu_mode_dumb_create,
124	.dumb_map_offset = virtio_gpu_mode_dumb_mmap,
125	.dumb_destroy = virtio_gpu_mode_dumb_destroy,
126
127#if defined(CONFIG_DEBUG_FS)
128	.debugfs_init = virtio_gpu_debugfs_init,
129	.debugfs_cleanup = virtio_gpu_debugfs_takedown,
130#endif
131	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
132	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
133	.gem_prime_export = drm_gem_prime_export,
134	.gem_prime_import = drm_gem_prime_import,
135	.gem_prime_pin = virtgpu_gem_prime_pin,
136	.gem_prime_unpin = virtgpu_gem_prime_unpin,
137	.gem_prime_get_sg_table = virtgpu_gem_prime_get_sg_table,
138	.gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
139	.gem_prime_vmap = virtgpu_gem_prime_vmap,
140	.gem_prime_vunmap = virtgpu_gem_prime_vunmap,
141	.gem_prime_mmap = virtgpu_gem_prime_mmap,
142
143	.gem_free_object_unlocked = virtio_gpu_gem_free_object,
144	.gem_open_object = virtio_gpu_gem_object_open,
145	.gem_close_object = virtio_gpu_gem_object_close,
146	.fops = &virtio_gpu_driver_fops,
147
148	.ioctls = virtio_gpu_ioctls,
149	.num_ioctls = DRM_VIRTIO_NUM_IOCTLS,
150
151	.name = DRIVER_NAME,
152	.desc = DRIVER_DESC,
153	.date = DRIVER_DATE,
154	.major = DRIVER_MAJOR,
155	.minor = DRIVER_MINOR,
156	.patchlevel = DRIVER_PATCHLEVEL,
157};