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};