// SPDX-License-Identifier: GPL-2.0-only/* * MDEV driver * * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. *     Author: Neo Jia <cjia@nvidia.com> *             Kirti Wankhede <kwankhede@nvidia.com> */ #include <linux/iommu.h>#include <linux/mdev.h> #include "mdev_private.h" static int mdev_probe(struct device *dev){	struct mdev_driver *drv =		container_of(dev->driver, struct mdev_driver, driver); 	if (!drv->probe)		return 0;	return drv->probe(to_mdev_device(dev));} static void mdev_remove(struct device *dev){	struct mdev_driver *drv =		container_of(dev->driver, struct mdev_driver, driver); 	if (drv->remove)		drv->remove(to_mdev_device(dev));} static int mdev_match(struct device *dev, const struct device_driver *drv){	/*	 * No drivers automatically match. Drivers are only bound by explicit	 * device_driver_attach()	 */	return 0;} const struct bus_type mdev_bus_type = {	.name		= "mdev",	.probe		= mdev_probe,	.remove		= mdev_remove,	.match		= mdev_match,}; /** * mdev_register_driver - register a new MDEV driver * @drv: the driver to register * * Returns a negative value on error, otherwise 0. **/int mdev_register_driver(struct mdev_driver *drv){	if (!drv->device_api)		return -EINVAL; 	/* initialize common driver fields */	drv->driver.bus = &mdev_bus_type;	return driver_register(&drv->driver);}EXPORT_SYMBOL(mdev_register_driver); /* * mdev_unregister_driver - unregister MDEV driver * @drv: the driver to unregister */void mdev_unregister_driver(struct mdev_driver *drv){	driver_unregister(&drv->driver);}EXPORT_SYMBOL(mdev_unregister_driver);