Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 * @driver_data - private pointer for driver specific info. Will turn into a
63 * list soon.
64 * @device - pointer back to the struct class that this structure is
65 * associated with.
66 *
67 * Nothing outside of the driver core should ever touch these fields.
68 */
69struct device_private {
70 struct klist klist_children;
71 struct klist_node knode_parent;
72 struct klist_node knode_driver;
73 struct klist_node knode_bus;
74 void *driver_data;
75 struct device *device;
76};
77#define to_device_private_parent(obj) \
78 container_of(obj, struct device_private, knode_parent)
79#define to_device_private_driver(obj) \
80 container_of(obj, struct device_private, knode_driver)
81#define to_device_private_bus(obj) \
82 container_of(obj, struct device_private, knode_bus)
83
84extern int device_private_init(struct device *dev);
85
86/* initialisation functions */
87extern int devices_init(void);
88extern int buses_init(void);
89extern int classes_init(void);
90extern int firmware_init(void);
91#ifdef CONFIG_SYS_HYPERVISOR
92extern int hypervisor_init(void);
93#else
94static inline int hypervisor_init(void) { return 0; }
95#endif
96extern int platform_bus_init(void);
97extern void cpu_dev_init(void);
98
99extern int bus_add_device(struct device *dev);
100extern void bus_probe_device(struct device *dev);
101extern void bus_remove_device(struct device *dev);
102
103extern int bus_add_driver(struct device_driver *drv);
104extern void bus_remove_driver(struct device_driver *drv);
105
106extern void driver_detach(struct device_driver *drv);
107extern int driver_probe_device(struct device_driver *drv, struct device *dev);
108static inline int driver_match_device(struct device_driver *drv,
109 struct device *dev)
110{
111 return drv->bus->match ? drv->bus->match(dev, drv) : 1;
112}
113
114extern char *make_class_name(const char *name, struct kobject *kobj);
115
116extern int devres_release_all(struct device *dev);
117
118/* /sys/devices directory */
119extern struct kset *devices_kset;
120
121#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
122extern void module_add_driver(struct module *mod, struct device_driver *drv);
123extern void module_remove_driver(struct device_driver *drv);
124#else
125static inline void module_add_driver(struct module *mod,
126 struct device_driver *drv) { }
127static inline void module_remove_driver(struct device_driver *drv) { }
128#endif
129
130#ifdef CONFIG_DEVTMPFS
131extern int devtmpfs_init(void);
132#else
133static inline int devtmpfs_init(void) { return 0; }
134#endif