// 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);
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