1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/notifier.h>
5 * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure.
7 * @subsys - the struct kset that defines this subsystem
8 * @devices_kset - the subsystem's 'devices' directory
9 * @interfaces - list of subsystem interfaces associated
10 * @mutex - protect the devices, and interfaces lists.
12 * @drivers_kset - the list of drivers associated
13 * @klist_devices - the klist to iterate over the @devices_kset
14 * @klist_drivers - the klist to iterate over the @drivers_kset
15 * @bus_notifier - the bus notifier list for anything that cares about things
17 * @bus - pointer back to the struct bus_type that this structure is associated
20 * @glue_dirs - "glue" directory to put in-between the parent device to
21 * avoid namespace conflicts
22 * @class - pointer back to the struct class that this structure is associated
25 * This structure is the one that is the actual kobject allowing struct
26 * bus_type/class to be statically allocated safely. Nothing outside of the
27 * driver core should ever touch these fields.
29 struct subsys_private {
31 struct kset *devices_kset;
32 struct list_head interfaces;
35 struct kset *drivers_kset;
36 struct klist klist_devices;
37 struct klist klist_drivers;
38 struct blocking_notifier_head bus_notifier;
39 unsigned int drivers_autoprobe:1;
42 struct kset glue_dirs;
45 #define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj)
47 struct driver_private {
49 struct klist klist_devices;
50 struct klist_node knode_bus;
51 struct module_kobject *mkobj;
52 struct device_driver *driver;
54 #define to_driver(obj) container_of(obj, struct driver_private, kobj)
57 * struct device_private - structure to hold the private to the driver core portions of the device structure.
59 * @klist_children - klist containing all children of this device
60 * @knode_parent - node in sibling list
61 * @knode_driver - node in driver list
62 * @knode_bus - node in bus list
63 * @knode_class - node in class list
64 * @deferred_probe - entry in deferred_probe_list which is used to retry the
65 * binding of drivers which were unable to get all the resources needed by
66 * the device; typically because it depends on another driver getting
68 * @device - pointer back to the struct device that this structure is
70 * @dead - This device is currently either in the process of or has been
71 * removed from the system. Any asynchronous events scheduled for this
72 * device should exit without taking any action.
74 * Nothing outside of the driver core should ever touch these fields.
76 struct device_private {
77 struct klist klist_children;
78 struct klist_node knode_parent;
79 struct klist_node knode_driver;
80 struct klist_node knode_bus;
81 struct klist_node knode_class;
82 struct list_head deferred_probe;
83 struct device *device;
86 #define to_device_private_parent(obj) \
87 container_of(obj, struct device_private, knode_parent)
88 #define to_device_private_driver(obj) \
89 container_of(obj, struct device_private, knode_driver)
90 #define to_device_private_bus(obj) \
91 container_of(obj, struct device_private, knode_bus)
92 #define to_device_private_class(obj) \
93 container_of(obj, struct device_private, knode_class)
95 /* initialisation functions */
96 extern int devices_init(void);
97 extern int buses_init(void);
98 extern int classes_init(void);
99 extern int firmware_init(void);
100 #ifdef CONFIG_SYS_HYPERVISOR
101 extern int hypervisor_init(void);
103 static inline int hypervisor_init(void) { return 0; }
105 extern int platform_bus_init(void);
106 extern void cpu_dev_init(void);
107 extern void container_dev_init(void);
109 struct kobject *virtual_device_parent(struct device *dev);
111 extern int bus_add_device(struct device *dev);
112 extern void bus_probe_device(struct device *dev);
113 extern void bus_remove_device(struct device *dev);
115 extern int bus_add_driver(struct device_driver *drv);
116 extern void bus_remove_driver(struct device_driver *drv);
117 extern void device_release_driver_internal(struct device *dev,
118 struct device_driver *drv,
119 struct device *parent);
121 extern void driver_detach(struct device_driver *drv);
122 extern int driver_probe_device(struct device_driver *drv, struct device *dev);
123 extern void driver_deferred_probe_del(struct device *dev);
124 static inline int driver_match_device(struct device_driver *drv,
127 return drv->bus->match ? drv->bus->match(dev, drv) : 1;
129 extern bool driver_allows_async_probing(struct device_driver *drv);
131 extern int driver_add_groups(struct device_driver *drv,
132 const struct attribute_group **groups);
133 extern void driver_remove_groups(struct device_driver *drv,
134 const struct attribute_group **groups);
135 int device_driver_attach(struct device_driver *drv, struct device *dev);
136 void device_driver_detach(struct device *dev);
138 extern char *make_class_name(const char *name, struct kobject *kobj);
140 extern int devres_release_all(struct device *dev);
141 extern void device_block_probing(void);
142 extern void device_unblock_probing(void);
144 /* /sys/devices directory */
145 extern struct kset *devices_kset;
146 extern void devices_kset_move_last(struct device *dev);
148 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
149 extern void module_add_driver(struct module *mod, struct device_driver *drv);
150 extern void module_remove_driver(struct device_driver *drv);
152 static inline void module_add_driver(struct module *mod,
153 struct device_driver *drv) { }
154 static inline void module_remove_driver(struct device_driver *drv) { }
157 #ifdef CONFIG_DEVTMPFS
158 extern int devtmpfs_init(void);
160 static inline int devtmpfs_init(void) { return 0; }
163 /* Device links support */
164 extern int device_links_read_lock(void);
165 extern void device_links_read_unlock(int idx);
166 extern int device_links_check_suppliers(struct device *dev);
167 extern void device_links_driver_bound(struct device *dev);
168 extern void device_links_driver_cleanup(struct device *dev);
169 extern void device_links_no_driver(struct device *dev);
170 extern bool device_links_busy(struct device *dev);
171 extern void device_links_unbind_consumers(struct device *dev);
173 /* device pm support */
174 void device_pm_move_to_tail(struct device *dev);