| /* 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; |
| }; |
| |
| static inline const guid_t *mdev_uuid(struct mdev_device *mdev) |
| { |
| return &mdev->uuid; |
| } |
| |
| 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 */ |