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