/* * Copyright (C) 2015 Red Hat, Inc. * All Rights Reserved. * * Authors: * Dave Airlie * Gerd Hoffmann * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include #include #include #include #include #include #include "virtgpu_drv.h" static struct drm_driver driver; static int virtio_gpu_modeset = -1; MODULE_PARM_DESC(modeset, "Disable/Enable modesetting"); module_param_named(modeset, virtio_gpu_modeset, int, 0400); static int virtio_gpu_pci_quirk(struct drm_device *dev, struct virtio_device *vdev) { struct pci_dev *pdev = to_pci_dev(vdev->dev.parent); const char *pname = dev_name(&pdev->dev); bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA; char unique[20]; DRM_INFO("pci: %s detected at %s\n", vga ? "virtio-vga" : "virtio-gpu-pci", pname); dev->pdev = pdev; if (vga) drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "virtiodrmfb"); /* * Normally the drm_dev_set_unique() call is done by core DRM. * The following comment covers, why virtio cannot rely on it. * * Unlike the other virtual GPU drivers, virtio abstracts the * underlying bus type by using struct virtio_device. * * Hence the dev_is_pci() check, used in core DRM, will fail * and the unique returned will be the virtio_device "virtio0", * while a "pci:..." one is required. * * A few other ideas were considered: * - Extend the dev_is_pci() check [in drm_set_busid] to * consider virtio. * Seems like a bigger hack than what we have already. * * - Point drm_device::dev to the parent of the virtio_device * Semantic changes: * * Using the wrong device for i2c, framebuffer_alloc and * prime import. * Visual changes: * * Helpers such as DRM_DEV_ERROR, dev_info, drm_printer, * will print the wrong information. * * We could address the latter issues, by introducing * drm_device::bus_dev, ... which would be used solely for this. * * So for the moment keep things as-is, with a bulky comment * for the next person who feels like removing this * drm_dev_set_unique() quirk. */ snprintf(unique, sizeof(unique), "pci:%s", pname); return drm_dev_set_unique(dev, unique); } static int virtio_gpu_probe(struct virtio_device *vdev) { struct drm_device *dev; int ret; if (vgacon_text_force() && virtio_gpu_modeset == -1) return -EINVAL; if (virtio_gpu_modeset == 0) return -EINVAL; dev = drm_dev_alloc(&driver, &vdev->dev); if (IS_ERR(dev)) return PTR_ERR(dev); vdev->priv = dev; if (!strcmp(vdev->dev.parent->bus->name, "pci")) { ret = virtio_gpu_pci_quirk(dev, vdev); if (ret) goto err_free; } ret = virtio_gpu_init(dev); if (ret) goto err_free; ret = drm_dev_register(dev, 0); if (ret) goto err_free; drm_fbdev_generic_setup(vdev->priv, 32); return 0; err_free: drm_dev_put(dev); return ret; } static void virtio_gpu_remove(struct virtio_device *vdev) { struct drm_device *dev = vdev->priv; drm_dev_unregister(dev); virtio_gpu_deinit(dev); drm_put_dev(dev); } static void virtio_gpu_config_changed(struct virtio_device *vdev) { struct drm_device *dev = vdev->priv; struct virtio_gpu_device *vgdev = dev->dev_private; schedule_work(&vgdev->config_changed_work); } static struct virtio_device_id id_table[] = { { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID }, { 0 }, }; static unsigned int features[] = { #ifdef __LITTLE_ENDIAN /* * Gallium command stream send by virgl is native endian. * Because of that we only support little endian guests on * little endian hosts. */ VIRTIO_GPU_F_VIRGL, #endif VIRTIO_GPU_F_EDID, }; static struct virtio_driver virtio_gpu_driver = { .feature_table = features, .feature_table_size = ARRAY_SIZE(features), .driver.name = KBUILD_MODNAME, .driver.owner = THIS_MODULE, .id_table = id_table, .probe = virtio_gpu_probe, .remove = virtio_gpu_remove, .config_changed = virtio_gpu_config_changed }; module_virtio_driver(virtio_gpu_driver); MODULE_DEVICE_TABLE(virtio, id_table); MODULE_DESCRIPTION("Virtio GPU driver"); MODULE_LICENSE("GPL and additional rights"); MODULE_AUTHOR("Dave Airlie "); MODULE_AUTHOR("Gerd Hoffmann "); MODULE_AUTHOR("Alon Levy"); DEFINE_DRM_GEM_SHMEM_FOPS(virtio_gpu_driver_fops); static struct drm_driver driver = { .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC, .open = virtio_gpu_driver_open, .postclose = virtio_gpu_driver_postclose, .dumb_create = virtio_gpu_mode_dumb_create, .dumb_map_offset = virtio_gpu_mode_dumb_mmap, #if defined(CONFIG_DEBUG_FS) .debugfs_init = virtio_gpu_debugfs_init, #endif .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table, .gem_create_object = virtio_gpu_create_object, .fops = &virtio_gpu_driver_fops, .ioctls = virtio_gpu_ioctls, .num_ioctls = DRM_VIRTIO_NUM_IOCTLS, .name = DRIVER_NAME, .desc = DRIVER_DESC, .date = DRIVER_DATE, .major = DRIVER_MAJOR, .minor = DRIVER_MINOR, .patchlevel = DRIVER_PATCHLEVEL, };