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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Mediated device definition
*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
* Author: Neo Jia <cjia@nvidia.com>
* Kirti Wankhede <kwankhede@nvidia.com>
*/
#ifndef MDEV_H
#define MDEV_H
struct mdev_type;
struct mdev_device {
struct device dev;
guid_t uuid;
struct list_head next;
struct mdev_type *type;
bool active;
};
static inline struct mdev_device *to_mdev_device(struct device *dev)
{
return container_of(dev, struct mdev_device, dev);
}
unsigned int mdev_get_type_group_id(struct mdev_device *mdev);
unsigned int mtype_get_type_group_id(struct mdev_type *mtype);
struct device *mtype_get_parent_dev(struct mdev_type *mtype);
/* interface for exporting mdev supported type attributes */
struct mdev_type_attribute {
struct attribute attr;
ssize_t (*show)(struct mdev_type *mtype,
struct mdev_type_attribute *attr, char *buf);
ssize_t (*store)(struct mdev_type *mtype,
struct mdev_type_attribute *attr, const char *buf,
size_t count);
};
#define MDEV_TYPE_ATTR(_name, _mode, _show, _store) \
struct mdev_type_attribute mdev_type_attr_##_name = \
__ATTR(_name, _mode, _show, _store)
#define MDEV_TYPE_ATTR_RW(_name) \
struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RW(_name)
#define MDEV_TYPE_ATTR_RO(_name) \
struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RO(_name)
#define MDEV_TYPE_ATTR_WO(_name) \
struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_WO(_name)
/**
* struct mdev_driver - Mediated device driver
* @probe: called when new device created
* @remove: called when device removed
* @supported_type_groups: Attributes to define supported types. It is mandatory
* to provide supported types.
* @driver: device driver structure
*
**/
struct mdev_driver {
int (*probe)(struct mdev_device *dev);
void (*remove)(struct mdev_device *dev);
struct attribute_group **supported_type_groups;
struct device_driver driver;
};
extern struct bus_type mdev_bus_type;
int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver);
void mdev_unregister_device(struct device *dev);
int mdev_register_driver(struct mdev_driver *drv);
void mdev_unregister_driver(struct mdev_driver *drv);
struct device *mdev_parent_dev(struct mdev_device *mdev);
static inline struct device *mdev_dev(struct mdev_device *mdev)
{
return &mdev->dev;
}
static inline struct mdev_device *mdev_from_dev(struct device *dev)
{
return dev->bus == &mdev_bus_type ? to_mdev_device(dev) : NULL;
}
#endif /* MDEV_H */
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