drivers/base/base.h

   1
   2 /**
   3  * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure.
   4  *
   5  * @subsys - the struct kset that defines this subsystem
   6  * @devices_kset - the list of devices associated
   7  *
   8  * @drivers_kset - the list of drivers associated
   9  * @klist_devices - the klist to iterate over the @devices_kset
  10  * @klist_drivers - the klist to iterate over the @drivers_kset
  11  * @bus_notifier - the bus notifier list for anything that cares about things
  12  *                 on this bus.
  13  * @bus - pointer back to the struct bus_type that this structure is associated
  14  *        with.
  15  *
  16  * @class_interfaces - list of class_interfaces associated
  17  * @glue_dirs - "glue" directory to put in-between the parent device to
  18  *              avoid namespace conflicts
  19  * @class_mutex - mutex to protect the children, devices, and interfaces lists.
  20  * @class - pointer back to the struct class that this structure is associated
  21  *          with.
  22  *
  23  * This structure is the one that is the actual kobject allowing struct
  24  * bus_type/class to be statically allocated safely.  Nothing outside of the
  25  * driver core should ever touch these fields.
  26  */
  27 struct subsys_private {
  28         struct kset subsys;
  29         struct kset *devices_kset;
  30
  31         struct kset *drivers_kset;
  32         struct klist klist_devices;
  33         struct klist klist_drivers;
  34         struct blocking_notifier_head bus_notifier;
  35         unsigned int drivers_autoprobe:1;
  36         struct bus_type *bus;
  37
  38         struct list_head class_interfaces;
  39         struct kset glue_dirs;
  40         struct mutex class_mutex;
  41         struct class *class;
  42 };
  43 #define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj)
  44
  45 struct driver_private {
  46         struct kobject kobj;
  47         struct klist klist_devices;
  48         struct klist_node knode_bus;
  49         struct module_kobject *mkobj;
  50         struct device_driver *driver;
  51 };
  52 #define to_driver(obj) container_of(obj, struct driver_private, kobj)
  53
  54 /**
  55  * struct device_private - structure to hold the private to the driver core portions of the device structure.
  56  *
  57  * @klist_children - klist containing all children of this device
  58  * @knode_parent - node in sibling list
  59  * @knode_driver - node in driver list
  60  * @knode_bus - node in bus list
  61  * @driver_data - private pointer for driver specific info.  Will turn into a
  62  * list soon.
  63  * @device - pointer back to the struct class that this structure is
  64  * associated with.
  65  *
  66  * Nothing outside of the driver core should ever touch these fields.
  67  */
  68 struct device_private {
  69         struct klist klist_children;
  70         struct klist_node knode_parent;
  71         struct klist_node knode_driver;
  72         struct klist_node knode_bus;
  73         void *driver_data;
  74         struct device *device;
  75 };
  76 #define to_device_private_parent(obj)   \
  77         container_of(obj, struct device_private, knode_parent)
  78 #define to_device_private_driver(obj)   \
  79         container_of(obj, struct device_private, knode_driver)
  80 #define to_device_private_bus(obj)      \
  81         container_of(obj, struct device_private, knode_bus)
  82
  83 extern int device_private_init(struct device *dev);
  84
  85 /* initialisation functions */
  86 extern int devices_init(void);
  87 extern int buses_init(void);
  88 extern int classes_init(void);
  89 extern int firmware_init(void);
  90 #ifdef CONFIG_SYS_HYPERVISOR
  91 extern int hypervisor_init(void);
  92 #else
  93 static inline int hypervisor_init(void) { return 0; }
  94 #endif
  95 extern int platform_bus_init(void);
  96 extern int system_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 extern struct kset *devices_kset;
 119
 120 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 121 extern void module_add_driver(struct module *mod, struct device_driver *drv);
 122 extern void module_remove_driver(struct device_driver *drv);
 123 #else
 124 static inline void module_add_driver(struct module *mod,
 125                                      struct device_driver *drv) { }
 126 static inline void module_remove_driver(struct device_driver *drv) { }
 127 #endif
 128
 129 #ifdef CONFIG_DEVTMPFS
 130 extern int devtmpfs_init(void);
 131 #else
 132 static inline int devtmpfs_init(void) { return 0; }
 133 #endif