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/*
* Copyright (C) 2015 Red Hat, Inc.
* All Rights Reserved.
*
* Authors:
* Dave Airlie <airlied@redhat.com>
* Gerd Hoffmann <kraxel@redhat.com>
*
* 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 <linux/module.h>
#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/wait.h>
#include <drm/drm.h>
#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_generic.h>
#include <drm/drm_file.h>
#include "virtgpu_drv.h"
static const 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 pci_dev *pdev = to_pci_dev(dev->dev);
const char *pname = dev_name(&pdev->dev);
bool vga = pci_is_vga(pdev);
int ret;
DRM_INFO("pci: %s detected at %s\n",
vga ? "virtio-vga" : "virtio-gpu-pci",
pname);
if (vga) {
ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &driver);
if (ret)
return ret;
}
return 0;
}
static int virtio_gpu_probe(struct virtio_device *vdev)
{
struct drm_device *dev;
int ret;
if (drm_firmware_drivers_only() && virtio_gpu_modeset == -1)
return -EINVAL;
if (virtio_gpu_modeset == 0)
return -EINVAL;
/*
* The virtio-gpu device is a virtual device that doesn't have DMA
* ops assigned to it, nor DMA mask set and etc. Its parent device
* is actual GPU device we want to use it for the DRM's device in
* order to benefit from using generic DRM APIs.
*/
dev = drm_dev_alloc(&driver, vdev->dev.parent);
if (IS_ERR(dev))
return PTR_ERR(dev);
vdev->priv = dev;
if (dev_is_pci(vdev->dev.parent)) {
ret = virtio_gpu_pci_quirk(dev);
if (ret)
goto err_free;
}
dma_set_max_seg_size(dev->dev, dma_max_mapping_size(dev->dev) ?: UINT_MAX);
ret = virtio_gpu_init(vdev, dev);
if (ret)
goto err_free;
ret = drm_dev_register(dev, 0);
if (ret)
goto err_deinit;
drm_fbdev_generic_setup(vdev->priv, 32);
return 0;
err_deinit:
virtio_gpu_deinit(dev);
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_unplug(dev);
drm_atomic_helper_shutdown(dev);
virtio_gpu_deinit(dev);
drm_dev_put(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,
VIRTIO_GPU_F_RESOURCE_UUID,
VIRTIO_GPU_F_RESOURCE_BLOB,
VIRTIO_GPU_F_CONTEXT_INIT,
};
static struct virtio_driver virtio_gpu_driver = {
.feature_table = features,
.feature_table_size = ARRAY_SIZE(features),
.driver.name = KBUILD_MODNAME,
.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 <airlied@redhat.com>");
MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
MODULE_AUTHOR("Alon Levy");
DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);
static const struct drm_driver driver = {
/*
* If KMS is disabled DRIVER_MODESET and DRIVER_ATOMIC are masked
* out via drm_device::driver_features:
*/
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC |
DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE | DRIVER_CURSOR_HOTSPOT,
.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
.gem_prime_import = virtgpu_gem_prime_import,
.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,
.release = virtio_gpu_release,
};
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