linux/include/linux/mdev.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Mediated device definition
 *
 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
 *     Author: Neo Jia <[email protected]>
 *             Kirti Wankhede <[email protected]>
 */

#ifndef MDEV_H
#define MDEV_H

#include <linux/device.h>
#include <linux/uuid.h>

struct mdev_type;

struct mdev_device { … };

struct mdev_type { … };

/* embedded into the struct device that the mdev devices hang off */
struct mdev_parent { … };

static inline struct mdev_device *to_mdev_device(struct device *dev)
{ … }

/**
 * struct mdev_driver - Mediated device driver
 * @device_api: string to return for the device_api sysfs
 * @max_instances: maximum number of instances supported (optional)
 * @probe: called when new device created
 * @remove: called when device removed
 * @get_available: Return the max number of instances that can be created
 * @show_description: Print a description of the mtype
 * @driver: device driver structure
 **/
struct mdev_driver { … };

int mdev_register_parent(struct mdev_parent *parent, struct device *dev,
		struct mdev_driver *mdev_driver, struct mdev_type **types,
		unsigned int nr_types);
void mdev_unregister_parent(struct mdev_parent *parent);

int mdev_register_driver(struct mdev_driver *drv);
void mdev_unregister_driver(struct mdev_driver *drv);

static inline struct device *mdev_dev(struct mdev_device *mdev)
{ … }

#endif /* MDEV_H */