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gerrit.nordix.org / codeaurora / cp-linux / 7d38e033b98fd00da3a0b3a506c27c772f7167bf / . / drivers / base / base.h
blob: 1782f3aa386e6db3571aa3a437a2f9a9d5f72066 [file] [log] [blame]
Kyle Swenson8d8f6542021-03-15 11:02:55 -0600[diff] [blame]1#include <linux/notifier.h>
2
3/**
4 * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure.
5 *
6 * @subsys - the struct kset that defines this subsystem
7 * @devices_kset - the subsystem's 'devices' directory
8 * @interfaces - list of subsystem interfaces associated
9 * @mutex - protect the devices, and interfaces lists.
10 *
11 * @drivers_kset - the list of drivers associated
12 * @klist_devices - the klist to iterate over the @devices_kset
13 * @klist_drivers - the klist to iterate over the @drivers_kset
14 * @bus_notifier - the bus notifier list for anything that cares about things
15 * on this bus.
16 * @bus - pointer back to the struct bus_type that this structure is associated
17 * with.
18 *
19 * @glue_dirs - "glue" directory to put in-between the parent device to
20 * avoid namespace conflicts
21 * @class - pointer back to the struct class that this structure is associated
22 * with.
23 *
24 * This structure is the one that is the actual kobject allowing struct
25 * bus_type/class to be statically allocated safely. Nothing outside of the
26 * driver core should ever touch these fields.
27 */
28struct subsys_private {
29 struct kset subsys;
30 struct kset *devices_kset;
31 struct list_head interfaces;
32 struct mutex mutex;
33
34 struct kset *drivers_kset;
35 struct klist klist_devices;
36 struct klist klist_drivers;
37 struct blocking_notifier_head bus_notifier;
38 unsigned int drivers_autoprobe:1;
39 struct bus_type *bus;
40
41 struct kset glue_dirs;
42 struct class *class;
43};
44#define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj)
45
46struct driver_private {
47 struct kobject kobj;
48 struct klist klist_devices;
49 struct klist_node knode_bus;
50 struct module_kobject *mkobj;
51 struct device_driver *driver;
52};
53#define to_driver(obj) container_of(obj, struct driver_private, kobj)
54
55/**
56 * struct device_private - structure to hold the private to the driver core portions of the device structure.
57 *
58 * @klist_children - klist containing all children of this device
59 * @knode_parent - node in sibling list
60 * @knode_driver - node in driver list
61 * @knode_bus - node in bus list
62 * @deferred_probe - entry in deferred_probe_list which is used to retry the
63 * binding of drivers which were unable to get all the resources needed by
64 * the device; typically because it depends on another driver getting
65 * probed first.
66 * @device - pointer back to the struct device that this structure is
67 * associated with.
68 *
69 * Nothing outside of the driver core should ever touch these fields.
70 */
71struct device_private {
72 struct klist klist_children;
73 struct klist_node knode_parent;
74 struct klist_node knode_driver;
75 struct klist_node knode_bus;
76 struct list_head deferred_probe;
77 struct device *device;
78};
79#define to_device_private_parent(obj) \
80 container_of(obj, struct device_private, knode_parent)
81#define to_device_private_driver(obj) \
82 container_of(obj, struct device_private, knode_driver)
83#define to_device_private_bus(obj) \
84 container_of(obj, struct device_private, knode_bus)
85
86extern int device_private_init(struct device *dev);
87
88/* initialisation functions */
89extern int devices_init(void);
90extern int buses_init(void);
91extern int classes_init(void);
92extern int firmware_init(void);
93#ifdef CONFIG_SYS_HYPERVISOR
94extern int hypervisor_init(void);
95#else
96static inline int hypervisor_init(void) { return 0; }
97#endif
98extern int platform_bus_init(void);
99extern void cpu_dev_init(void);
100extern void container_dev_init(void);
101
102struct kobject *virtual_device_parent(struct device *dev);
103
104extern int bus_add_device(struct device *dev);
105extern void bus_probe_device(struct device *dev);
106extern void bus_remove_device(struct device *dev);
107
108extern int bus_add_driver(struct device_driver *drv);
109extern void bus_remove_driver(struct device_driver *drv);
110
111extern void driver_detach(struct device_driver *drv);
112extern int driver_probe_device(struct device_driver *drv, struct device *dev);
113extern void driver_deferred_probe_del(struct device *dev);
114static inline int driver_match_device(struct device_driver *drv,
115 struct device *dev)
116{
117 return drv->bus->match ? drv->bus->match(dev, drv) : 1;
118}
119extern bool driver_allows_async_probing(struct device_driver *drv);
120
121extern int driver_add_groups(struct device_driver *drv,
122 const struct attribute_group **groups);
123extern void driver_remove_groups(struct device_driver *drv,
124 const struct attribute_group **groups);
125
126extern int device_add_groups(struct device *dev,
127 const struct attribute_group **groups);
128extern void device_remove_groups(struct device *dev,
129 const struct attribute_group **groups);
130
131extern char *make_class_name(const char *name, struct kobject *kobj);
132
133extern int devres_release_all(struct device *dev);
134
135/* /sys/devices directory */
136extern struct kset *devices_kset;
137extern void devices_kset_move_last(struct device *dev);
138
139#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
140extern void module_add_driver(struct module *mod, struct device_driver *drv);
141extern void module_remove_driver(struct device_driver *drv);
142#else
143static inline void module_add_driver(struct module *mod,
144 struct device_driver *drv) { }
145static inline void module_remove_driver(struct device_driver *drv) { }
146#endif
147
148#ifdef CONFIG_DEVTMPFS
149extern int devtmpfs_init(void);
150#else
151static inline int devtmpfs_init(void) { return 0; }
152#endif