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  * @device - pointer back to the struct device that this structure is
  67  * associated with.
  68  *
  69  * Nothing outside of the driver core should ever touch these fields.
  70  */
  71 struct device_private {
  72         struct klist klist_children;
  73         struct klist_node knode_parent;
  74         struct klist_node knode_driver;
  75         struct klist_node knode_bus;
  76         struct list_head deferred_probe;
  77         struct device *device;
  78 };
  79 #define to_device_private_parent(obj)   \
  80         container_of(obj, struct device_private, knode_parent)
  81 #define to_device_private_driver(obj)   \
  82         container_of(obj, struct device_private, knode_driver)
  83 #define to_device_private_bus(obj)      \
  84         container_of(obj, struct device_private, knode_bus)
  85
  86 extern int device_private_init(struct device *dev);
  87
  88 /* initialisation functions */
  89 extern int devices_init(void);
  90 extern int buses_init(void);
  91 extern int classes_init(void);
  92 extern int firmware_init(void);
  93 #ifdef CONFIG_SYS_HYPERVISOR
  94 extern int hypervisor_init(void);
  95 #else
  96 static inline int hypervisor_init(void) { return 0; }
  97 #endif
  98 extern int platform_bus_init(void);
  99 extern void cpu_dev_init(void);
 100 extern void container_dev_init(void);
 101
 102 struct kobject *virtual_device_parent(struct device *dev);
 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 extern void device_release_driver_internal(struct device *dev,
 111                                            struct device_driver *drv,
 112                                            struct device *parent);
 113
 114 extern void driver_detach(struct device_driver *drv);
 115 extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 116 extern void driver_deferred_probe_del(struct device *dev);
 117 static inline int driver_match_device(struct device_driver *drv,
 118                                       struct device *dev)
 119 {
 120         return drv->bus->match ? drv->bus->match(dev, drv) : 1;
 121 }
 122 extern bool driver_allows_async_probing(struct device_driver *drv);
 123
 124 extern int driver_add_groups(struct device_driver *drv,
 125                              const struct attribute_group **groups);
 126 extern void driver_remove_groups(struct device_driver *drv,
 127                                  const struct attribute_group **groups);
 128
 129 extern int device_add_groups(struct device *dev,
 130                              const struct attribute_group **groups);
 131 extern void device_remove_groups(struct device *dev,
 132                                  const struct attribute_group **groups);
 133
 134 extern char *make_class_name(const char *name, struct kobject *kobj);
 135
 136 extern int devres_release_all(struct device *dev);
 137 extern void device_block_probing(void);
 138 extern void device_unblock_probing(void);
 139
 140 /* /sys/devices directory */
 141 extern struct kset *devices_kset;
 142 extern void devices_kset_move_last(struct device *dev);
 143
 144 extern struct device_attribute dev_attr_deferred_probe;
 145
 146 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 147 extern void module_add_driver(struct module *mod, struct device_driver *drv);
 148 extern void module_remove_driver(struct device_driver *drv);
 149 #else
 150 static inline void module_add_driver(struct module *mod,
 151                                      struct device_driver *drv) { }
 152 static inline void module_remove_driver(struct device_driver *drv) { }
 153 #endif
 154
 155 #ifdef CONFIG_DEVTMPFS
 156 extern int devtmpfs_init(void);
 157 #else
 158 static inline int devtmpfs_init(void) { return 0; }
 159 #endif
 160
 161 /* Device links support */
 162 extern int device_links_read_lock(void);
 163 extern void device_links_read_unlock(int idx);
 164 extern int device_links_check_suppliers(struct device *dev);
 165 extern void device_links_driver_bound(struct device *dev);
 166 extern void device_links_driver_cleanup(struct device *dev);
 167 extern void device_links_no_driver(struct device *dev);
 168 extern bool device_links_busy(struct device *dev);
 169 extern void device_links_unbind_consumers(struct device *dev);