drivers/base/base.h

   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  */
  28 struct 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
  46 struct 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  */
  73 struct 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
  89 extern int device_private_init(struct device *dev);
  90
  91 /* initialisation functions */
  92 extern int devices_init(void);
  93 extern int buses_init(void);
  94 extern int classes_init(void);
  95 extern int firmware_init(void);
  96 #ifdef CONFIG_SYS_HYPERVISOR
  97 extern int hypervisor_init(void);
  98 #else
  99 static inline int hypervisor_init(void) { return 0; }
 100 #endif
 101 extern int platform_bus_init(void);
 102 extern void cpu_dev_init(void);
 103
 104 extern int bus_add_device(struct device *dev);
 105 extern void bus_probe_device(struct device *dev);
 106 extern void bus_remove_device(struct device *dev);
 107
 108 extern int bus_add_driver(struct device_driver *drv);
 109 extern void bus_remove_driver(struct device_driver *drv);
 110
 111 extern void driver_detach(struct device_driver *drv);
 112 extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 113 extern void driver_deferred_probe_del(struct device *dev);
 114 static 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 }
 119
 120 extern char *make_class_name(const char *name, struct kobject *kobj);
 121
 122 extern int devres_release_all(struct device *dev);
 123
 124 /* /sys/devices directory */
 125 extern struct kset *devices_kset;
 126
 127 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 128 extern void module_add_driver(struct module *mod, struct device_driver *drv);
 129 extern void module_remove_driver(struct device_driver *drv);
 130 #else
 131 static inline void module_add_driver(struct module *mod,
 132                                      struct device_driver *drv) { }
 133 static inline void module_remove_driver(struct device_driver *drv) { }
 134 #endif
 135
 136 #ifdef CONFIG_DEVTMPFS
 137 extern int devtmpfs_init(void);
 138 #else
 139 static inline int devtmpfs_init(void) { return 0; }
 140 #endif