drivers/base/base.h

   1
   2 /**
   3  * struct bus_type_private - structure to hold the private to the driver core portions of the bus_type structure.
   4  *
   5  * @subsys - the struct kset that defines this bus.  This is the main kobject
   6  * @drivers_kset - the list of drivers associated with this bus
   7  * @devices_kset - the list of devices associated with this bus
   8  * @klist_devices - the klist to iterate over the @devices_kset
   9  * @klist_drivers - the klist to iterate over the @drivers_kset
  10  * @bus_notifier - the bus notifier list for anything that cares about things
  11  * on this bus.
  12  * @bus - pointer back to the struct bus_type that this structure is associated
  13  * with.
  14  *
  15  * This structure is the one that is the actual kobject allowing struct
  16  * bus_type to be statically allocated safely.  Nothing outside of the driver
  17  * core should ever touch these fields.
  18  */
  19 struct bus_type_private {
  20         struct kset subsys;
  21         struct kset *drivers_kset;
  22         struct kset *devices_kset;
  23         struct klist klist_devices;
  24         struct klist klist_drivers;
  25         struct blocking_notifier_head bus_notifier;
  26         unsigned int drivers_autoprobe:1;
  27         struct bus_type *bus;
  28 };
  29
  30 struct driver_private {
  31         struct kobject kobj;
  32         struct klist klist_devices;
  33         struct klist_node knode_bus;
  34         struct module_kobject *mkobj;
  35         struct device_driver *driver;
  36 };
  37 #define to_driver(obj) container_of(obj, struct driver_private, kobj)
  38
  39
  40 /**
  41  * struct class_private - structure to hold the private to the driver core portions of the class structure.
  42  *
  43  * @class_subsys - the struct kset that defines this class.  This is the main kobject
  44  * @class_devices - list of devices associated with this class
  45  * @class_interfaces - list of class_interfaces associated with this class
  46  * @class_dirs - "glue" directory for virtual devices associated with this class
  47  * @class_mutex - mutex to protect the children, devices, and interfaces lists.
  48  * @class - pointer back to the struct class that this structure is associated
  49  * with.
  50  *
  51  * This structure is the one that is the actual kobject allowing struct
  52  * class to be statically allocated safely.  Nothing outside of the driver
  53  * core should ever touch these fields.
  54  */
  55 struct class_private {
  56         struct kset class_subsys;
  57         struct klist class_devices;
  58         struct list_head class_interfaces;
  59         struct kset class_dirs;
  60         struct mutex class_mutex;
  61         struct class *class;
  62 };
  63 #define to_class(obj)   \
  64         container_of(obj, struct class_private, class_subsys.kobj)
  65
  66 /**
  67  * struct device_private - structure to hold the private to the driver core portions of the device structure.
  68  *
  69  * @klist_children - klist containing all children of this device
  70  * @knode_parent - node in sibling list
  71  * @knode_driver - node in driver list
  72  * @knode_bus - node in bus list
  73  * @device - pointer back to the struct class that this structure is
  74  * associated with.
  75  *
  76  * Nothing outside of the driver core should ever touch these fields.
  77  */
  78 struct device_private {
  79         struct klist klist_children;
  80         struct klist_node knode_parent;
  81         struct klist_node knode_driver;
  82         struct klist_node knode_bus;
  83         struct device *device;
  84 };
  85 #define to_device_private_parent(obj)   \
  86         container_of(obj, struct device_private, knode_parent)
  87 #define to_device_private_driver(obj)   \
  88         container_of(obj, struct device_private, knode_driver)
  89 #define to_device_private_bus(obj)      \
  90         container_of(obj, struct device_private, knode_bus)
  91
  92 /* initialisation functions */
  93 extern int devices_init(void);
  94 extern int buses_init(void);
  95 extern int classes_init(void);
  96 extern int firmware_init(void);
  97 #ifdef CONFIG_SYS_HYPERVISOR
  98 extern int hypervisor_init(void);
  99 #else
 100 static inline int hypervisor_init(void) { return 0; }
 101 #endif
 102 extern int platform_bus_init(void);
 103 extern int system_bus_init(void);
 104 extern int cpu_dev_init(void);
 105
 106 extern int bus_add_device(struct device *dev);
 107 extern void bus_attach_device(struct device *dev);
 108 extern void bus_remove_device(struct device *dev);
 109
 110 extern int bus_add_driver(struct device_driver *drv);
 111 extern void bus_remove_driver(struct device_driver *drv);
 112
 113 extern void driver_detach(struct device_driver *drv);
 114 extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 115 static inline int driver_match_device(struct device_driver *drv,
 116                                       struct device *dev)
 117 {
 118         return drv->bus->match && drv->bus->match(dev, drv);
 119 }
 120
 121 extern void sysdev_shutdown(void);
 122
 123 extern char *make_class_name(const char *name, struct kobject *kobj);
 124
 125 extern int devres_release_all(struct device *dev);
 126
 127 extern struct kset *devices_kset;
 128
 129 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 130 extern void module_add_driver(struct module *mod, struct device_driver *drv);
 131 extern void module_remove_driver(struct device_driver *drv);
 132 #else
 133 static inline void module_add_driver(struct module *mod,
 134                                      struct device_driver *drv) { }
 135 static inline void module_remove_driver(struct device_driver *drv) { }
 136 #endif