projects/linux·blob v3.13 · refs

152 lines · 5.2 KiB

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 * @driver_data - private pointer for driver specific info. Will turn into a
67 * list soon.
68 * @device - pointer back to the struct class that this structure is
69 * associated with.
70 *
71 * Nothing outside of the driver core should ever touch these fields.
72 */
73struct device_private {
74 struct klist klist_children;
75 struct klist_node knode_parent;
76 struct klist_node knode_driver;
77 struct klist_node knode_bus;
78 struct list_head deferred_probe;
79 void *driver_data;
80 struct device *device;
81};
82#define to_device_private_parent(obj) \
83 container_of(obj, struct device_private, knode_parent)
84#define to_device_private_driver(obj) \
85 container_of(obj, struct device_private, knode_driver)
86#define to_device_private_bus(obj) \
87 container_of(obj, struct device_private, knode_bus)
88
89extern int device_private_init(struct device *dev);
90
91/* initialisation functions */
92extern int devices_init(void);
93extern int buses_init(void);
94extern int classes_init(void);
95extern int firmware_init(void);
96#ifdef CONFIG_SYS_HYPERVISOR
97extern int hypervisor_init(void);
98#else
99static inline int hypervisor_init(void) { return 0; }
100#endif
101extern int platform_bus_init(void);
102extern void cpu_dev_init(void);
103
104struct kobject *virtual_device_parent(struct device *dev);
105
106extern int bus_add_device(struct device *dev);
107extern void bus_probe_device(struct device *dev);
108extern void bus_remove_device(struct device *dev);
109
110extern int bus_add_driver(struct device_driver *drv);
111extern void bus_remove_driver(struct device_driver *drv);
112
113extern void driver_detach(struct device_driver *drv);
114extern int driver_probe_device(struct device_driver *drv, struct device *dev);
115extern void driver_deferred_probe_del(struct device *dev);
116static inline int driver_match_device(struct device_driver *drv,
117 struct device *dev)
118{
119 return drv->bus->match ? drv->bus->match(dev, drv) : 1;
120}
121
122extern int driver_add_groups(struct device_driver *drv,
123 const struct attribute_group **groups);
124extern void driver_remove_groups(struct device_driver *drv,
125 const struct attribute_group **groups);
126
127extern int device_add_groups(struct device *dev,
128 const struct attribute_group **groups);
129extern void device_remove_groups(struct device *dev,
130 const struct attribute_group **groups);
131
132extern char *make_class_name(const char *name, struct kobject *kobj);
133
134extern int devres_release_all(struct device *dev);
135
136/* /sys/devices directory */
137extern struct kset *devices_kset;
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