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 * @deferred_probe - entry in deferred_probe_list which is used to retry the
64 * binding of drivers which were unable to get all the resources needed by
65 * the device; typically because it depends on another driver getting
67 * @device - pointer back to the struct device that this structure is
70 * Nothing outside of the driver core should ever touch these fields.
72 struct device_private
{
73 struct klist klist_children
;
74 struct klist_node knode_parent
;
75 struct klist_node knode_driver
;
76 struct klist_node knode_bus
;
77 struct list_head deferred_probe
;
78 struct device
*device
;
80 #define to_device_private_parent(obj) \
81 container_of(obj, struct device_private, knode_parent)
82 #define to_device_private_driver(obj) \
83 container_of(obj, struct device_private, knode_driver)
84 #define to_device_private_bus(obj) \
85 container_of(obj, struct device_private, knode_bus)
87 /* initialisation functions */
88 extern int devices_init(void);
89 extern int buses_init(void);
90 extern int classes_init(void);
91 extern int firmware_init(void);
92 #ifdef CONFIG_SYS_HYPERVISOR
93 extern int hypervisor_init(void);
95 static inline int hypervisor_init(void) { return 0; }
97 extern int platform_bus_init(void);
98 extern void cpu_dev_init(void);
99 extern void container_dev_init(void);
101 struct kobject
*virtual_device_parent(struct device
*dev
);
103 extern int bus_add_device(struct device
*dev
);
104 extern void bus_probe_device(struct device
*dev
);
105 extern void bus_remove_device(struct device
*dev
);
107 extern int bus_add_driver(struct device_driver
*drv
);
108 extern void bus_remove_driver(struct device_driver
*drv
);
109 extern void device_release_driver_internal(struct device
*dev
,
110 struct device_driver
*drv
,
111 struct device
*parent
);
113 extern void driver_detach(struct device_driver
*drv
);
114 extern int driver_probe_device(struct device_driver
*drv
, struct device
*dev
);
115 extern void driver_deferred_probe_del(struct device
*dev
);
116 static inline int driver_match_device(struct device_driver
*drv
,
119 return drv
->bus
->match
? drv
->bus
->match(dev
, drv
) : 1;
121 extern bool driver_allows_async_probing(struct device_driver
*drv
);
123 extern int driver_add_groups(struct device_driver
*drv
,
124 const struct attribute_group
**groups
);
125 extern void driver_remove_groups(struct device_driver
*drv
,
126 const struct attribute_group
**groups
);
128 extern char *make_class_name(const char *name
, struct kobject
*kobj
);
130 extern int devres_release_all(struct device
*dev
);
131 extern void device_block_probing(void);
132 extern void device_unblock_probing(void);
134 /* /sys/devices directory */
135 extern struct kset
*devices_kset
;
136 extern void devices_kset_move_last(struct device
*dev
);
138 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
139 extern void module_add_driver(struct module
*mod
, struct device_driver
*drv
);
140 extern void module_remove_driver(struct device_driver
*drv
);
142 static inline void module_add_driver(struct module
*mod
,
143 struct device_driver
*drv
) { }
144 static inline void module_remove_driver(struct device_driver
*drv
) { }
147 #ifdef CONFIG_DEVTMPFS
148 extern int devtmpfs_init(void);
150 static inline int devtmpfs_init(void) { return 0; }
153 /* Device links support */
154 extern int device_links_read_lock(void);
155 extern void device_links_read_unlock(int idx
);
156 extern int device_links_check_suppliers(struct device
*dev
);
157 extern void device_links_driver_bound(struct device
*dev
);
158 extern void device_links_driver_cleanup(struct device
*dev
);
159 extern void device_links_no_driver(struct device
*dev
);
160 extern bool device_links_busy(struct device
*dev
);
161 extern void device_links_unbind_consumers(struct device
*dev
);
163 /* device pm support */
164 void device_pm_move_to_tail(struct device
*dev
);