LXR linux/drivers/gpu/drm/virtio/virtgpu

   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};
 163