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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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/** * struct subsys_private - structure to hold the private to the driver core * portions of the bus_type/class structure. * @subsys: the struct kset that defines this subsystem * @devices_kset: the subsystem's 'devices' directory * @interfaces: list of subsystem interfaces associated * @mutex: protect the devices, and interfaces lists. * @drivers_kset: the list of drivers associated * @klist_devices: the klist to iterate over the @devices_kset * @klist_drivers: the klist to iterate over the @drivers_kset * @bus_notifier: the bus notifier list for anything that cares about things * on this bus. * @drivers_autoprobe: gate whether new devices are automatically attached to * registered drivers, or new drivers automatically attach * to existing devices. * @bus: pointer back to the struct bus_type that this structure is associated * with. * @dev_root: Default device to use as the parent. * @glue_dirs: "glue" directory to put in-between the parent device to * avoid namespace conflicts * @class: pointer back to the struct class that this structure is associated * with. * @lock_key: Lock class key for use by the lock validator * * This structure is the one that is the actual kobject allowing struct * bus_type/class to be statically allocated safely. Nothing outside of the * driver core should ever touch these fields. */struct subsys_private { struct kset subsys; struct kset *devices_kset; struct list_head interfaces; struct mutex mutex;
struct kset *drivers_kset; struct klist klist_devices; struct klist klist_drivers; struct blocking_notifier_head bus_notifier; unsigned int drivers_autoprobe:1; const struct bus_type *bus; struct device *dev_root;
struct kset glue_dirs; const struct class *class;
struct lock_class_key lock_key;};#define to_subsys_private(obj) container_of_const(obj, struct subsys_private, subsys.kobj)
static inline struct subsys_private *subsys_get(struct subsys_private *sp){ if (sp) kset_get(&sp->subsys); return sp;}
static inline void subsys_put(struct subsys_private *sp){ if (sp) kset_put(&sp->subsys);}
struct subsys_private *bus_to_subsys(const struct bus_type *bus);struct subsys_private *class_to_subsys(const struct class *class);
struct driver_private { struct kobject kobj; struct klist klist_devices; struct klist_node knode_bus; struct module_kobject *mkobj; struct device_driver *driver;};#define to_driver(obj) container_of(obj, struct driver_private, kobj)
/** * struct device_private - structure to hold the private to the driver core * portions of the device structure. * @klist_children: klist containing all children of this device * @knode_parent: node in sibling list * @knode_driver: node in driver list * @knode_bus: node in bus list * @knode_class: node in class list * @deferred_probe: entry in deferred_probe_list which is used to retry the * binding of drivers which were unable to get all the * resources needed by the device; typically because it depends * on another driver getting probed first. * @async_driver: pointer to device driver awaiting probe via async_probe * @deferred_probe_reason: capture the -EPROBE_DEFER message emitted with * dev_err_probe() for later retrieval via debugfs * @device: pointer back to the struct device that this structure is * associated with. * @dead: This device is currently either in the process of or has been * removed from the system. Any asynchronous events scheduled for this * device should exit without taking any action. * * Nothing outside of the driver core should ever touch these fields. */struct device_private { struct klist klist_children; struct klist_node knode_parent; struct klist_node knode_driver; struct klist_node knode_bus; struct klist_node knode_class; struct list_head deferred_probe; const struct device_driver *async_driver; char *deferred_probe_reason; struct device *device; u8 dead:1;};#define to_device_private_parent(obj) \ container_of(obj, struct device_private, knode_parent)#define to_device_private_driver(obj) \ container_of(obj, struct device_private, knode_driver)#define to_device_private_bus(obj) \ container_of(obj, struct device_private, knode_bus)#define to_device_private_class(obj) \ container_of(obj, struct device_private, knode_class)
/* initialisation functions */int devices_init(void);int buses_init(void);int classes_init(void);int firmware_init(void);#ifdef CONFIG_SYS_HYPERVISORint hypervisor_init(void);#elsestatic inline int hypervisor_init(void) { return 0; }#endifint platform_bus_init(void);int faux_bus_init(void);void cpu_dev_init(void);void container_dev_init(void);#ifdef CONFIG_AUXILIARY_BUSvoid auxiliary_bus_init(void);#elsestatic inline void auxiliary_bus_init(void) { }#endif
struct kobject *virtual_device_parent(void);
int bus_add_device(struct device *dev);void bus_probe_device(struct device *dev);void bus_remove_device(struct device *dev);void bus_notify(struct device *dev, enum bus_notifier_event value);bool bus_is_registered(const struct bus_type *bus);
int bus_add_driver(struct device_driver *drv);void bus_remove_driver(struct device_driver *drv);void device_release_driver_internal(struct device *dev, const struct device_driver *drv, struct device *parent);
void driver_detach(const struct device_driver *drv);void driver_deferred_probe_del(struct device *dev);void device_set_deferred_probe_reason(const struct device *dev, struct va_format *vaf);static inline int driver_match_device(const struct device_driver *drv, struct device *dev){ return drv->bus->match ? drv->bus->match(dev, drv) : 1;}
static inline bool dev_has_sync_state(struct device *dev){ struct device_driver *drv;
if (!dev) return false; drv = READ_ONCE(dev->driver); if (drv && drv->sync_state) return true; if (dev->bus && dev->bus->sync_state) return true; return false;}
static inline void dev_sync_state(struct device *dev){ if (dev->bus->sync_state) dev->bus->sync_state(dev); else if (dev->driver && dev->driver->sync_state) dev->driver->sync_state(dev);}
int driver_add_groups(const struct device_driver *drv, const struct attribute_group *const *groups);void driver_remove_groups(const struct device_driver *drv, const struct attribute_group *const *groups);void device_driver_detach(struct device *dev);
static inline void device_set_driver(struct device *dev, const struct device_driver *drv){ /* * Majority (all?) read accesses to dev->driver happens either * while holding device lock or in bus/driver code that is only * invoked when the device is bound to a driver and there is no * concern of the pointer being changed while it is being read. * However when reading device's uevent file we read driver pointer * without taking device lock (so we do not block there for * arbitrary amount of time). We use WRITE_ONCE() here to prevent * tearing so that READ_ONCE() can safely be used in uevent code. */ // FIXME - this cast should not be needed "soon" WRITE_ONCE(dev->driver, (struct device_driver *)drv);}
struct devres_node;typedef void (*dr_node_release_t)(struct device *dev, struct devres_node *node);typedef void (*dr_node_free_t)(struct devres_node *node);
struct devres_node { struct list_head entry; dr_node_release_t release; dr_node_free_t free_node; const char *name; size_t size;};
void devres_node_init(struct devres_node *node, dr_node_release_t release, dr_node_free_t free_node);void devres_node_add(struct device *dev, struct devres_node *node);bool devres_node_remove(struct device *dev, struct devres_node *node);void devres_set_node_dbginfo(struct devres_node *node, const char *name, size_t size);void devres_for_each_res(struct device *dev, dr_release_t release, dr_match_t match, void *match_data, void (*fn)(struct device *, void *, void *), void *data);int devres_release_all(struct device *dev);void device_block_probing(void);void device_unblock_probing(void);void deferred_probe_extend_timeout(void);void driver_deferred_probe_trigger(void);const char *device_get_devnode(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid, const char **tmp);
/* /sys/devices directory */extern struct kset *devices_kset;void devices_kset_move_last(struct device *dev);
#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)int module_add_driver(struct module *mod, const struct device_driver *drv);void module_remove_driver(const struct device_driver *drv);#elsestatic inline int module_add_driver(struct module *mod, struct device_driver *drv){ return 0;}static inline void module_remove_driver(struct device_driver *drv) { }#endif
#ifdef CONFIG_DEVTMPFSint devtmpfs_init(void);#elsestatic inline int devtmpfs_init(void) { return 0; }#endif
#ifdef CONFIG_BLOCKextern const struct class block_class;static inline bool is_blockdev(struct device *dev){ return dev->class == &block_class;}#elsestatic inline bool is_blockdev(struct device *dev) { return false; }#endif
/* Device links support */int device_links_read_lock(void);void device_links_read_unlock(int idx);int device_links_read_lock_held(void);int device_links_check_suppliers(struct device *dev);void device_links_force_bind(struct device *dev);void device_links_driver_bound(struct device *dev);void device_links_driver_cleanup(struct device *dev);void device_links_no_driver(struct device *dev);bool device_links_busy(struct device *dev);void device_links_unbind_consumers(struct device *dev);bool device_link_flag_is_sync_state_only(u32 flags);void fw_devlink_drivers_done(void);void fw_devlink_probing_done(void);
#define dev_for_each_link_to_supplier(__link, __dev) \ list_for_each_entry_srcu(__link, &(__dev)->links.suppliers, c_node, \ device_links_read_lock_held())
#define dev_for_each_link_to_consumer(__link, __dev) \ list_for_each_entry_srcu(__link, &(__dev)->links.consumers, s_node, \ device_links_read_lock_held())
/* device pm support */void device_pm_move_to_tail(struct device *dev);
#ifdef CONFIG_DEVTMPFSint devtmpfs_create_node(struct device *dev);int devtmpfs_delete_node(struct device *dev);#elsestatic inline int devtmpfs_create_node(struct device *dev) { return 0; }static inline int devtmpfs_delete_node(struct device *dev) { return 0; }#endif
void software_node_init(void);void software_node_notify(struct device *dev);void software_node_notify_remove(struct device *dev);
#ifdef CONFIG_PINCTRLint pinctrl_bind_pins(struct device *dev);#elsestatic inline int pinctrl_bind_pins(struct device *dev){ return 0;}#endif /* CONFIG_PINCTRL */