| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org> |
| * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de> |
| * Copyright (c) 2008-2012 Novell Inc. |
| * Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| * Copyright (c) 2012-2019 Linux Foundation |
| * |
| * Core driver model functions and structures that should not be |
| * shared outside of the drivers/base/ directory. |
| * |
| */ |
| #include <linux/notifier.h> |
| |
| /** |
| * 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. |
| * @bus - pointer back to the struct bus_type that this structure is associated |
| * with. |
| * |
| * @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. |
| * |
| * 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; |
| struct bus_type *bus; |
| |
| struct kset glue_dirs; |
| struct class *class; |
| }; |
| #define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj) |
| |
| 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 |
| * @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; |
| 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 */ |
| extern int devices_init(void); |
| extern int buses_init(void); |
| extern int classes_init(void); |
| extern int firmware_init(void); |
| #ifdef CONFIG_SYS_HYPERVISOR |
| extern int hypervisor_init(void); |
| #else |
| static inline int hypervisor_init(void) { return 0; } |
| #endif |
| extern int platform_bus_init(void); |
| extern void cpu_dev_init(void); |
| extern void container_dev_init(void); |
| #ifdef CONFIG_AUXILIARY_BUS |
| extern void auxiliary_bus_init(void); |
| #else |
| static inline void auxiliary_bus_init(void) { } |
| #endif |
| |
| struct kobject *virtual_device_parent(struct device *dev); |
| |
| extern int bus_add_device(struct device *dev); |
| extern void bus_probe_device(struct device *dev); |
| extern void bus_remove_device(struct device *dev); |
| |
| extern int bus_add_driver(struct device_driver *drv); |
| extern void bus_remove_driver(struct device_driver *drv); |
| extern void device_release_driver_internal(struct device *dev, |
| struct device_driver *drv, |
| struct device *parent); |
| |
| extern void driver_detach(struct device_driver *drv); |
| extern void driver_deferred_probe_del(struct device *dev); |
| extern void device_set_deferred_probe_reason(const struct device *dev, |
| struct va_format *vaf); |
| static inline int driver_match_device(struct device_driver *drv, |
| struct device *dev) |
| { |
| return drv->bus->match ? drv->bus->match(dev, drv) : 1; |
| } |
| extern bool driver_allows_async_probing(struct device_driver *drv); |
| |
| extern int driver_add_groups(struct device_driver *drv, |
| const struct attribute_group **groups); |
| extern void driver_remove_groups(struct device_driver *drv, |
| const struct attribute_group **groups); |
| void device_driver_detach(struct device *dev); |
| |
| extern int devres_release_all(struct device *dev); |
| extern void device_block_probing(void); |
| extern void device_unblock_probing(void); |
| extern void deferred_probe_extend_timeout(void); |
| extern void driver_deferred_probe_trigger(void); |
| |
| /* /sys/devices directory */ |
| extern struct kset *devices_kset; |
| extern void devices_kset_move_last(struct device *dev); |
| |
| #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS) |
| extern void module_add_driver(struct module *mod, struct device_driver *drv); |
| extern void module_remove_driver(struct device_driver *drv); |
| #else |
| static inline void module_add_driver(struct module *mod, |
| struct device_driver *drv) { } |
| static inline void module_remove_driver(struct device_driver *drv) { } |
| #endif |
| |
| #ifdef CONFIG_DEVTMPFS |
| extern int devtmpfs_init(void); |
| #else |
| static inline int devtmpfs_init(void) { return 0; } |
| #endif |
| |
| /* Device links support */ |
| extern int device_links_read_lock(void); |
| extern void device_links_read_unlock(int idx); |
| extern int device_links_read_lock_held(void); |
| extern int device_links_check_suppliers(struct device *dev); |
| extern void device_links_force_bind(struct device *dev); |
| extern void device_links_driver_bound(struct device *dev); |
| extern void device_links_driver_cleanup(struct device *dev); |
| extern void device_links_no_driver(struct device *dev); |
| extern bool device_links_busy(struct device *dev); |
| extern void device_links_unbind_consumers(struct device *dev); |
| extern void fw_devlink_drivers_done(void); |
| |
| /* device pm support */ |
| void device_pm_move_to_tail(struct device *dev); |
| |
| #ifdef CONFIG_DEVTMPFS |
| int devtmpfs_create_node(struct device *dev); |
| int devtmpfs_delete_node(struct device *dev); |
| #else |
| static 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_notify(struct device *dev); |
| void software_node_notify_remove(struct device *dev); |