drivers/gpu/drm/virtio/virtgpu_drv.c

   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"
  36 static struct drm_driver driver;
  37
  38 static int virtio_gpu_modeset = -1;
  39
  40 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  41 module_param_named(modeset, virtio_gpu_modeset, int, 0400);
  42
  43 static 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
  56 static void virtio_gpu_remove(struct virtio_device *vdev)
  57 {
  58         struct drm_device *dev = vdev->priv;
  59         drm_put_dev(dev);
  60 }
  61
  62 static 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
  70 static struct virtio_device_id id_table[] = {
  71         { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },
  72         { 0 },
  73 };
  74
  75 static 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 };
  85 static 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
  96 module_virtio_driver(virtio_gpu_driver);
  97
  98 MODULE_DEVICE_TABLE(virtio, id_table);
  99 MODULE_DESCRIPTION("Virtio GPU driver");
 100 MODULE_LICENSE("GPL and additional rights");
 101 MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
 102 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 103 MODULE_AUTHOR("Alon Levy");
 104
 105 static 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
 120 static 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 };