/* 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 */