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  * @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  */
  69 struct 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
  84 extern int device_private_init(struct device *dev);
  85
  86 /* initialisation functions */
  87 extern int devices_init(void);
  88 extern int buses_init(void);
  89 extern int classes_init(void);
  90 extern int firmware_init(void);
  91 #ifdef CONFIG_SYS_HYPERVISOR
  92 extern int hypervisor_init(void);
  93 #else
  94 static inline int hypervisor_init(void) { return 0; }
  95 #endif
  96 extern int platform_bus_init(void);
  97 extern int cpu_dev_init(void);
  98
  99 extern int bus_add_device(struct device *dev);
 100 extern void bus_probe_device(struct device *dev);
 101 extern void bus_remove_device(struct device *dev);
 102
 103 extern int bus_add_driver(struct device_driver *drv);
 104 extern void bus_remove_driver(struct device_driver *drv);
 105
 106 extern void driver_detach(struct device_driver *drv);
 107 extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 108 static 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
 114 extern char *make_class_name(const char *name, struct kobject *kobj);
 115
 116 extern int devres_release_all(struct device *dev);
 117
 118 /* /sys/devices directory */
 119 extern struct kset *devices_kset;
 120
 121 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 122 extern void module_add_driver(struct module *mod, struct device_driver *drv);
 123 extern void module_remove_driver(struct device_driver *drv);
 124 #else
 125 static inline void module_add_driver(struct module *mod,
 126                                      struct device_driver *drv) { }
 127 static inline void module_remove_driver(struct device_driver *drv) { }
 128 #endif
 129
 130 #ifdef CONFIG_DEVTMPFS
 131 extern int devtmpfs_init(void);
 132 #else
 133 static inline int devtmpfs_init(void) { return 0; }
 134 #endif