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 const struct mdev_parent_ops *ops; 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 #define to_mdev_type_attr(_attr) \ 36 container_of(_attr, struct mdev_type_attribute, attr) 37 #define to_mdev_type(_kobj) \ 38 container_of(_kobj, struct mdev_type, kobj) 39 40 int parent_create_sysfs_files(struct mdev_parent *parent); 41 void parent_remove_sysfs_files(struct mdev_parent *parent); 42 43 int mdev_create_sysfs_files(struct mdev_device *mdev); 44 void mdev_remove_sysfs_files(struct mdev_device *mdev); 45 46 int mdev_device_create(struct mdev_type *kobj, const guid_t *uuid); 47 int mdev_device_remove(struct mdev_device *dev); 48 49 void mdev_release_parent(struct kref *kref); 50 mdev_get_parent(struct mdev_parent * parent)51static inline void mdev_get_parent(struct mdev_parent *parent) 52 { 53 kref_get(&parent->ref); 54 } 55 mdev_put_parent(struct mdev_parent * parent)56static inline void mdev_put_parent(struct mdev_parent *parent) 57 { 58 kref_put(&parent->ref, mdev_release_parent); 59 } 60 61 #endif /* MDEV_PRIVATE_H */ 62