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 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 54 static void virtio_gpu_remove(struct virtio_device *vdev) 55 { 56 struct drm_device *dev = vdev->priv; 57 drm_put_dev(dev); 58 } 59 60 static 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 68 static struct virtio_device_id id_table[] = { 69 { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID }, 70 { 0 }, 71 }; 72 73 static 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 }; 83 static 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 94 module_virtio_driver(virtio_gpu_driver); 95 96 MODULE_DEVICE_TABLE(virtio, id_table); 97 MODULE_DESCRIPTION("Virtio GPU driver"); 98 MODULE_LICENSE("GPL and additional rights"); 99 MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>"); 100 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>"); 101 MODULE_AUTHOR("Alon Levy"); 102 103 static 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 #ifdef CONFIG_COMPAT 112 .compat_ioctl = drm_compat_ioctl, 113 #endif 114 .llseek = noop_llseek, 115 }; 116 117 118 static struct drm_driver driver = { 119 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_RENDER | DRIVER_ATOMIC, 120 .set_busid = drm_virtio_set_busid, 121 .load = virtio_gpu_driver_load, 122 .unload = virtio_gpu_driver_unload, 123 .open = virtio_gpu_driver_open, 124 .postclose = virtio_gpu_driver_postclose, 125 126 .dumb_create = virtio_gpu_mode_dumb_create, 127 .dumb_map_offset = virtio_gpu_mode_dumb_mmap, 128 .dumb_destroy = virtio_gpu_mode_dumb_destroy, 129 130 #if defined(CONFIG_DEBUG_FS) 131 .debugfs_init = virtio_gpu_debugfs_init, 132 .debugfs_cleanup = virtio_gpu_debugfs_takedown, 133 #endif 134 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 135 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 136 .gem_prime_export = drm_gem_prime_export, 137 .gem_prime_import = drm_gem_prime_import, 138 .gem_prime_pin = virtgpu_gem_prime_pin, 139 .gem_prime_unpin = virtgpu_gem_prime_unpin, 140 .gem_prime_get_sg_table = virtgpu_gem_prime_get_sg_table, 141 .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table, 142 .gem_prime_vmap = virtgpu_gem_prime_vmap, 143 .gem_prime_vunmap = virtgpu_gem_prime_vunmap, 144 .gem_prime_mmap = virtgpu_gem_prime_mmap, 145 146 .gem_free_object = virtio_gpu_gem_free_object, 147 .gem_open_object = virtio_gpu_gem_object_open, 148 .gem_close_object = virtio_gpu_gem_object_close, 149 .fops = &virtio_gpu_driver_fops, 150 151 .ioctls = virtio_gpu_ioctls, 152 .num_ioctls = DRM_VIRTIO_NUM_IOCTLS, 153 154 .name = DRIVER_NAME, 155 .desc = DRIVER_DESC, 156 .date = DRIVER_DATE, 157 .major = DRIVER_MAJOR, 158 .minor = DRIVER_MINOR, 159 .patchlevel = DRIVER_PATCHLEVEL, 160 }; 161