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  * @driver_data - private pointer for driver specific info.  Will turn into a
  74  * list soon.
  75  * @device - pointer back to the struct class that this structure is
  76  * associated with.
  77  *
  78  * Nothing outside of the driver core should ever touch these fields.
  79  */
  80 struct device_private {
  81         struct klist klist_children;
  82         struct klist_node knode_parent;
  83         struct klist_node knode_driver;
  84         struct klist_node knode_bus;
  85         void *driver_data;
  86         struct device *device;
  87 };
  88 #define to_device_private_parent(obj)   \
  89         container_of(obj, struct device_private, knode_parent)
  90 #define to_device_private_driver(obj)   \
  91         container_of(obj, struct device_private, knode_driver)
  92 #define to_device_private_bus(obj)      \
  93         container_of(obj, struct device_private, knode_bus)
  94
  95 extern int device_private_init(struct device *dev);
  96
  97 /* initialisation functions */
  98 extern int devices_init(void);
  99 extern int buses_init(void);
 100 extern int classes_init(void);
 101 extern int firmware_init(void);
 102 #ifdef CONFIG_SYS_HYPERVISOR
 103 extern int hypervisor_init(void);
 104 #else
 105 static inline int hypervisor_init(void) { return 0; }
 106 #endif
 107 extern int platform_bus_init(void);
 108 extern int system_bus_init(void);
 109 extern int cpu_dev_init(void);
 110
 111 extern int bus_add_device(struct device *dev);
 112 extern void bus_probe_device(struct device *dev);
 113 extern void bus_remove_device(struct device *dev);
 114
 115 extern int bus_add_driver(struct device_driver *drv);
 116 extern void bus_remove_driver(struct device_driver *drv);
 117
 118 extern void driver_detach(struct device_driver *drv);
 119 extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 120 static inline int driver_match_device(struct device_driver *drv,
 121                                       struct device *dev)
 122 {
 123         return drv->bus->match ? drv->bus->match(dev, drv) : 1;
 124 }
 125
 126 extern void sysdev_shutdown(void);
 127
 128 extern char *make_class_name(const char *name, struct kobject *kobj);
 129
 130 extern int devres_release_all(struct device *dev);
 131
 132 extern struct kset *devices_kset;
 133
 134 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 135 extern void module_add_driver(struct module *mod, struct device_driver *drv);
 136 extern void module_remove_driver(struct device_driver *drv);
 137 #else
 138 static inline void module_add_driver(struct module *mod,
 139                                      struct device_driver *drv) { }
 140 static inline void module_remove_driver(struct device_driver *drv) { }
 141 #endif
 142
 143 #ifdef CONFIG_DEVTMPFS
 144 extern int devtmpfs_init(void);
 145 #else
 146 static inline int devtmpfs_init(void) { return 0; }
 147 #endif