projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 7b96953b KW |
2 | /* |
| 3 | * Mediated device definition | |
| 4 | * | |
| 5 | * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. | |
| 6 | * Author: Neo Jia <cjia@nvidia.com> | |
| 7 | * Kirti Wankhede <kwankhede@nvidia.com> | |
| 7b96953b KW |
8 | */ |
| 9 | ||
| 10 | #ifndef MDEV_H | |
| 11 | #define MDEV_H | |
| 12 | ||
| 417fd5bf JG |
13 | struct mdev_type; |
| 14 | ||
| 2a3d15f2 JG |
15 | struct mdev_device { |
| 16 | struct device dev; | |
| 2a3d15f2 | 17 | guid_t uuid; |
| 2a3d15f2 | 18 | struct list_head next; |
| 417fd5bf | 19 | struct mdev_type *type; |
| 2a3d15f2 JG |
20 | bool active; |
| 21 | }; | |
| 22 | ||
| 23 | static inline struct mdev_device *to_mdev_device(struct device *dev) | |
| 24 | { | |
| 25 | return container_of(dev, struct mdev_device, dev); | |
| 26 | } | |
| 7b96953b | 27 | |
| 15fcc44b | 28 | unsigned int mdev_get_type_group_id(struct mdev_device *mdev); |
| 9169cff1 JG |
29 | unsigned int mtype_get_type_group_id(struct mdev_type *mtype); |
| 30 | struct device *mtype_get_parent_dev(struct mdev_type *mtype); | |
| 15fcc44b | 31 | |
| 7b96953b KW |
32 | /* interface for exporting mdev supported type attributes */ |
| 33 | struct mdev_type_attribute { | |
| 34 | struct attribute attr; | |
| 9169cff1 JG |
35 | ssize_t (*show)(struct mdev_type *mtype, |
| 36 | struct mdev_type_attribute *attr, char *buf); | |
| 37 | ssize_t (*store)(struct mdev_type *mtype, | |
| 38 | struct mdev_type_attribute *attr, const char *buf, | |
| 39 | size_t count); | |
| 7b96953b KW |
40 | }; |
| 41 | ||
| 42 | #define MDEV_TYPE_ATTR(_name, _mode, _show, _store) \ | |
| 43 | struct mdev_type_attribute mdev_type_attr_##_name = \ | |
| 44 | __ATTR(_name, _mode, _show, _store) | |
| 45 | #define MDEV_TYPE_ATTR_RW(_name) \ | |
| 46 | struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RW(_name) | |
| 47 | #define MDEV_TYPE_ATTR_RO(_name) \ | |
| 48 | struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RO(_name) | |
| 49 | #define MDEV_TYPE_ATTR_WO(_name) \ | |
| 50 | struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_WO(_name) | |
| 51 | ||
| 52 | /** | |
| 53 | * struct mdev_driver - Mediated device driver | |
| 7b96953b KW |
54 | * @probe: called when new device created |
| 55 | * @remove: called when device removed | |
| 6b42f491 JG |
56 | * @supported_type_groups: Attributes to define supported types. It is mandatory |
| 57 | * to provide supported types. | |
| 7b96953b KW |
58 | * @driver: device driver structure |
| 59 | * | |
| 60 | **/ | |
| 61 | struct mdev_driver { | |
| 2a3d15f2 JG |
62 | int (*probe)(struct mdev_device *dev); |
| 63 | void (*remove)(struct mdev_device *dev); | |
| 6b42f491 | 64 | struct attribute_group **supported_type_groups; |
| 7b96953b KW |
65 | struct device_driver driver; |
| 66 | }; | |
| 67 | ||
| 2a3d15f2 JG |
68 | static inline const guid_t *mdev_uuid(struct mdev_device *mdev) |
| 69 | { | |
| 70 | return &mdev->uuid; | |
| 71 | } | |
| 7b96953b KW |
72 | |
| 73 | extern struct bus_type mdev_bus_type; | |
| 74 | ||
| 6b42f491 | 75 | int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver); |
| 50732af3 | 76 | void mdev_unregister_device(struct device *dev); |
| 7b96953b | 77 | |
| 91b9969d | 78 | int mdev_register_driver(struct mdev_driver *drv); |
| 50732af3 | 79 | void mdev_unregister_driver(struct mdev_driver *drv); |
| 7b96953b | 80 | |
| 50732af3 | 81 | struct device *mdev_parent_dev(struct mdev_device *mdev); |
| 2a3d15f2 JG |
82 | static inline struct device *mdev_dev(struct mdev_device *mdev) |
| 83 | { | |
| 84 | return &mdev->dev; | |
| 85 | } | |
| 86 | static inline struct mdev_device *mdev_from_dev(struct device *dev) | |
| 87 | { | |
| 88 | return dev->bus == &mdev_bus_type ? to_mdev_device(dev) : NULL; | |
| 89 | } | |
| 9372e6fe | 90 | |
| 7b96953b | 91 | #endif /* MDEV_H */ |