1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Mediated device internal definitions 4 * 5 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. 6 * Author: Neo Jia <cjia@nvidia.com> 7 * Kirti Wankhede <kwankhede@nvidia.com> 8 */ 9 10 #ifndef MDEV_PRIVATE_H 11 #define MDEV_PRIVATE_H 12 13 int mdev_bus_register(void); 14 void mdev_bus_unregister(void); 15 16 struct mdev_parent { 17 struct device *dev; 18 struct mdev_driver *mdev_driver; 19 struct kref ref; 20 struct list_head next; 21 struct kset *mdev_types_kset; 22 struct list_head type_list; 23 /* Synchronize device creation/removal with parent unregistration */ 24 struct rw_semaphore unreg_sem; 25 }; 26 27 struct mdev_type { 28 struct kobject kobj; 29 struct kobject *devices_kobj; 30 struct mdev_parent *parent; 31 struct list_head next; 32 unsigned int type_group_id; 33 }; 34 35 extern const struct attribute_group *mdev_device_groups[]; 36 37 #define to_mdev_type_attr(_attr) \ 38 container_of(_attr, struct mdev_type_attribute, attr) 39 #define to_mdev_type(_kobj) \ 40 container_of(_kobj, struct mdev_type, kobj) 41 42 int parent_create_sysfs_files(struct mdev_parent *parent); 43 void parent_remove_sysfs_files(struct mdev_parent *parent); 44 45 int mdev_create_sysfs_files(struct mdev_device *mdev); 46 void mdev_remove_sysfs_files(struct mdev_device *mdev); 47 48 int mdev_device_create(struct mdev_type *kobj, const guid_t *uuid); 49 int mdev_device_remove(struct mdev_device *dev); 50 51 void mdev_release_parent(struct kref *kref); 52 53 static inline void mdev_get_parent(struct mdev_parent *parent) 54 { 55 kref_get(&parent->ref); 56 } 57 58 static inline void mdev_put_parent(struct mdev_parent *parent) 59 { 60 kref_put(&parent->ref, mdev_release_parent); 61 } 62 63 #endif /* MDEV_PRIVATE_H */ 64