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, 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