LXR linux/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 */
  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 * @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 */
  71struct 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
  86extern int device_private_init(struct device *dev);
  87
  88/* initialisation functions */
  89extern int devices_init(void);
  90extern int buses_init(void);
  91extern int classes_init(void);
  92extern int firmware_init(void);
  93#ifdef CONFIG_SYS_HYPERVISOR
  94extern int hypervisor_init(void);
  95#else
  96static inline int hypervisor_init(void) { return 0; }
  97#endif
  98extern int platform_bus_init(void);
  99extern void cpu_dev_init(void);
 100extern void container_dev_init(void);
 101
 102struct kobject *virtual_device_parent(struct device *dev);
 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);
 110extern void device_release_driver_internal(struct device *dev,
 111                                           struct device_driver *drv,
 112                                           struct device *parent);
 113
 114extern void driver_detach(struct device_driver *drv);
 115extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 116extern void driver_deferred_probe_del(struct device *dev);
 117static 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}
 122extern bool driver_allows_async_probing(struct device_driver *drv);
 123
 124extern int driver_add_groups(struct device_driver *drv,
 125                             const struct attribute_group **groups);
 126extern void driver_remove_groups(struct device_driver *drv,
 127                                 const struct attribute_group **groups);
 128
 129extern int device_add_groups(struct device *dev,
 130                             const struct attribute_group **groups);
 131extern void device_remove_groups(struct device *dev,
 132                                 const struct attribute_group **groups);
 133
 134extern char *make_class_name(const char *name, struct kobject *kobj);
 135
 136extern int devres_release_all(struct device *dev);
 137extern void device_block_probing(void);
 138extern void device_unblock_probing(void);
 139
 140/* /sys/devices directory */
 141extern struct kset *devices_kset;
 142extern void devices_kset_move_last(struct device *dev);
 143
 144#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
 145extern void module_add_driver(struct module *mod, struct device_driver *drv);
 146extern void module_remove_driver(struct device_driver *drv);
 147#else
 148static inline void module_add_driver(struct module *mod,
 149                                     struct device_driver *drv) { }
 150static inline void module_remove_driver(struct device_driver *drv) { }
 151#endif
 152
 153#ifdef CONFIG_DEVTMPFS
 154extern int devtmpfs_init(void);
 155#else
 156static inline int devtmpfs_init(void) { return 0; }
 157#endif
 158
 159/* Device links support */
 160extern int device_links_read_lock(void);
 161extern void device_links_read_unlock(int idx);
 162extern int device_links_check_suppliers(struct device *dev);
 163extern void device_links_driver_bound(struct device *dev);
 164extern void device_links_driver_cleanup(struct device *dev);
 165extern void device_links_no_driver(struct device *dev);
 166extern bool device_links_busy(struct device *dev);
 167extern void device_links_unbind_consumers(struct device *dev);
 168