linux/drivers/base/base.h
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   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 */
  28struct 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
  46struct 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 */
  73struct 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
  89extern int device_private_init(struct device *dev);
  90
  91/* initialisation functions */
  92extern int devices_init(void);
  93extern int buses_init(void);
  94extern int classes_init(void);
  95extern int firmware_init(void);
  96#ifdef CONFIG_SYS_HYPERVISOR
  97extern int hypervisor_init(void);
  98#else
  99static inline int hypervisor_init(void) { return 0; }
 100#endif
 101extern int platform_bus_init(void);
 102extern void cpu_dev_init(void);
 103
 104extern int bus_add_device(struct device *dev);
 105extern void bus_probe_device(struct device *dev);
 106extern void bus_remove_device(struct device *dev);
 107
 108extern int bus_add_driver(struct device_driver *drv);
 109extern void bus_remove_driver(struct device_driver *drv);
 110
 111extern void driver_detach(struct device_driver *drv);
 112extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 113extern void driver_deferred_probe_del(struct device *dev);
 114static 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
 120extern char *make_class_name(const char *name, struct kobject *kobj);
 121
 122extern int devres_release_all(struct device *dev);
 123
 124/* /sys/devices directory */
 125extern struct kset *devices_kset;
 126
 127#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 128extern void module_add_driver(struct module *mod, struct device_driver *drv);
 129extern void module_remove_driver(struct device_driver *drv);
 130#else
 131static inline void module_add_driver(struct module *mod,
 132                                     struct device_driver *drv) { }
 133static inline void module_remove_driver(struct device_driver *drv) { }
 134#endif
 135
 136#ifdef CONFIG_DEVTMPFS
 137extern int devtmpfs_init(void);
 138#else
 139static inline int devtmpfs_init(void) { return 0; }
 140#endif
 141
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