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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 a10 * copy of this software and associated documentation files (the "Software"),11 * to deal in the Software without restriction, including without limitation12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,13 * and/or sell copies of the Software, and to permit persons to whom the14 * Software is furnished to do so, subject to the following conditions:15 *16 * The above copyright notice and this permission notice (including the next17 * paragraph) shall be included in all copies or substantial portions of the18 * Software.19 *20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR24 * 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 OR26 * OTHER DEALINGS IN THE SOFTWARE.27 */28 29#include <linux/module.h>30#include <linux/pci.h>31#include <linux/poll.h>32#include <linux/wait.h>33 34#include <drm/drm.h>35#include <drm/drm_aperture.h>36#include <drm/drm_atomic_helper.h>37#include <drm/drm_drv.h>38#include <drm/drm_fbdev_shmem.h>39#include <drm/drm_file.h>40 41#include "virtgpu_drv.h"42 43static const struct drm_driver driver;44 45static int virtio_gpu_modeset = -1;46 47MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");48module_param_named(modeset, virtio_gpu_modeset, int, 0400);49 50static int virtio_gpu_pci_quirk(struct drm_device *dev)51{52 struct pci_dev *pdev = to_pci_dev(dev->dev);53 const char *pname = dev_name(&pdev->dev);54 bool vga = pci_is_vga(pdev);55 int ret;56 57 DRM_INFO("pci: %s detected at %s\n",58 vga ? "virtio-vga" : "virtio-gpu-pci",59 pname);60 if (vga) {61 ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &driver);62 if (ret)63 return ret;64 }65 66 return 0;67}68 69static int virtio_gpu_probe(struct virtio_device *vdev)70{71 struct drm_device *dev;72 int ret;73 74 if (drm_firmware_drivers_only() && virtio_gpu_modeset == -1)75 return -EINVAL;76 77 if (virtio_gpu_modeset == 0)78 return -EINVAL;79 80 /*81 * The virtio-gpu device is a virtual device that doesn't have DMA82 * ops assigned to it, nor DMA mask set and etc. Its parent device83 * is actual GPU device we want to use it for the DRM's device in84 * order to benefit from using generic DRM APIs.85 */86 dev = drm_dev_alloc(&driver, vdev->dev.parent);87 if (IS_ERR(dev))88 return PTR_ERR(dev);89 vdev->priv = dev;90 91 if (dev_is_pci(vdev->dev.parent)) {92 ret = virtio_gpu_pci_quirk(dev);93 if (ret)94 goto err_free;95 }96 97 dma_set_max_seg_size(dev->dev, dma_max_mapping_size(dev->dev) ?: UINT_MAX);98 ret = virtio_gpu_init(vdev, dev);99 if (ret)100 goto err_free;101 102 ret = drm_dev_register(dev, 0);103 if (ret)104 goto err_deinit;105 106 drm_fbdev_shmem_setup(vdev->priv, 32);107 return 0;108 109err_deinit:110 virtio_gpu_deinit(dev);111err_free:112 drm_dev_put(dev);113 return ret;114}115 116static void virtio_gpu_remove(struct virtio_device *vdev)117{118 struct drm_device *dev = vdev->priv;119 120 drm_dev_unplug(dev);121 drm_atomic_helper_shutdown(dev);122 virtio_gpu_deinit(dev);123 drm_dev_put(dev);124}125 126static void virtio_gpu_config_changed(struct virtio_device *vdev)127{128 struct drm_device *dev = vdev->priv;129 struct virtio_gpu_device *vgdev = dev->dev_private;130 131 schedule_work(&vgdev->config_changed_work);132}133 134static struct virtio_device_id id_table[] = {135 { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID },136 { 0 },137};138 139static unsigned int features[] = {140#ifdef __LITTLE_ENDIAN141 /*142 * Gallium command stream send by virgl is native endian.143 * Because of that we only support little endian guests on144 * little endian hosts.145 */146 VIRTIO_GPU_F_VIRGL,147#endif148 VIRTIO_GPU_F_EDID,149 VIRTIO_GPU_F_RESOURCE_UUID,150 VIRTIO_GPU_F_RESOURCE_BLOB,151 VIRTIO_GPU_F_CONTEXT_INIT,152};153static struct virtio_driver virtio_gpu_driver = {154 .feature_table = features,155 .feature_table_size = ARRAY_SIZE(features),156 .driver.name = KBUILD_MODNAME,157 .id_table = id_table,158 .probe = virtio_gpu_probe,159 .remove = virtio_gpu_remove,160 .config_changed = virtio_gpu_config_changed161};162 163module_virtio_driver(virtio_gpu_driver);164 165MODULE_DEVICE_TABLE(virtio, id_table);166MODULE_DESCRIPTION("Virtio GPU driver");167MODULE_LICENSE("GPL and additional rights");168MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");169MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");170MODULE_AUTHOR("Alon Levy");171 172DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);173 174static const struct drm_driver driver = {175 /*176 * If KMS is disabled DRIVER_MODESET and DRIVER_ATOMIC are masked177 * out via drm_device::driver_features:178 */179 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC |180 DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE | DRIVER_CURSOR_HOTSPOT,181 .open = virtio_gpu_driver_open,182 .postclose = virtio_gpu_driver_postclose,183 184 .dumb_create = virtio_gpu_mode_dumb_create,185 .dumb_map_offset = virtio_gpu_mode_dumb_mmap,186 187#if defined(CONFIG_DEBUG_FS)188 .debugfs_init = virtio_gpu_debugfs_init,189#endif190 .gem_prime_import = virtgpu_gem_prime_import,191 .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,192 193 .gem_create_object = virtio_gpu_create_object,194 .fops = &virtio_gpu_driver_fops,195 196 .ioctls = virtio_gpu_ioctls,197 .num_ioctls = DRM_VIRTIO_NUM_IOCTLS,198 199 .name = DRIVER_NAME,200 .desc = DRIVER_DESC,201 .date = DRIVER_DATE,202 .major = DRIVER_MAJOR,203 .minor = DRIVER_MINOR,204 .patchlevel = DRIVER_PATCHLEVEL,205 206 .release = virtio_gpu_release,207};208