87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
|
// 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/device.h>
|
||
|
|
#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, struct device_driver *drv)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* No drivers automatically match. Drivers are only bound by explicit
|
||
|
|
* device_driver_attach()
|
||
|
|
*/
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct bus_type mdev_bus_type = {
|
||
|
|
.name = "mdev",
|
||
|
|
.probe = mdev_probe,
|
||
|
|
.remove = mdev_remove,
|
||
|
|
.match = mdev_match,
|
||
|
|
};
|
||
|
|
EXPORT_SYMBOL_GPL(mdev_bus_type);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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)
|
||
|
|
{
|
||
|
|
/* initialize common driver fields */
|
||
|
|
drv->driver.bus = &mdev_bus_type;
|
||
|
|
|
||
|
|
/* register with core */
|
||
|
|
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);
|
||
|
|
|
||
|
|
int mdev_bus_register(void)
|
||
|
|
{
|
||
|
|
return bus_register(&mdev_bus_type);
|
||
|
|
}
|
||
|
|
|
||
|
|
void mdev_bus_unregister(void)
|
||
|
|
{
|
||
|
|
bus_unregister(&mdev_bus_type);
|
||
|
|
}
|