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207 lines
7.4 KiB
207 lines
7.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (c) 2001-2003 Patrick Mochel <[email protected]> |
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* Copyright (c) 2004-2009 Greg Kroah-Hartman <[email protected]> |
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* Copyright (c) 2008-2012 Novell Inc. |
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* Copyright (c) 2012-2019 Greg Kroah-Hartman <[email protected]> |
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* Copyright (c) 2012-2019 Linux Foundation |
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* |
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* Core driver model functions and structures that should not be |
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* shared outside of the drivers/base/ directory. |
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* |
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*/ |
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#include <linux/notifier.h> |
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/** |
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* struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure. |
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* |
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* @subsys - the struct kset that defines this subsystem |
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* @devices_kset - the subsystem's 'devices' directory |
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* @interfaces - list of subsystem interfaces associated |
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* @mutex - protect the devices, and interfaces lists. |
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* |
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* @drivers_kset - the list of drivers associated |
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* @klist_devices - the klist to iterate over the @devices_kset |
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* @klist_drivers - the klist to iterate over the @drivers_kset |
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* @bus_notifier - the bus notifier list for anything that cares about things |
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* on this bus. |
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* @bus - pointer back to the struct bus_type that this structure is associated |
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* with. |
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* |
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* @glue_dirs - "glue" directory to put in-between the parent device to |
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* avoid namespace conflicts |
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* @class - pointer back to the struct class that this structure is associated |
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* with. |
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* |
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* This structure is the one that is the actual kobject allowing struct |
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* bus_type/class to be statically allocated safely. Nothing outside of the |
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* driver core should ever touch these fields. |
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*/ |
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struct subsys_private { |
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struct kset subsys; |
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struct kset *devices_kset; |
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struct list_head interfaces; |
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struct mutex mutex; |
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struct kset *drivers_kset; |
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struct klist klist_devices; |
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struct klist klist_drivers; |
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struct blocking_notifier_head bus_notifier; |
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unsigned int drivers_autoprobe:1; |
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struct bus_type *bus; |
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struct kset glue_dirs; |
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struct class *class; |
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}; |
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#define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj) |
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struct driver_private { |
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struct kobject kobj; |
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struct klist klist_devices; |
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struct klist_node knode_bus; |
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struct module_kobject *mkobj; |
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struct device_driver *driver; |
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}; |
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#define to_driver(obj) container_of(obj, struct driver_private, kobj) |
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/** |
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* struct device_private - structure to hold the private to the driver core portions of the device structure. |
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* |
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* @klist_children - klist containing all children of this device |
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* @knode_parent - node in sibling list |
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* @knode_driver - node in driver list |
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* @knode_bus - node in bus list |
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* @knode_class - node in class list |
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* @deferred_probe - entry in deferred_probe_list which is used to retry the |
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* binding of drivers which were unable to get all the resources needed by |
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* the device; typically because it depends on another driver getting |
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* probed first. |
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* @async_driver - pointer to device driver awaiting probe via async_probe |
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* @device - pointer back to the struct device that this structure is |
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* associated with. |
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* @dead - This device is currently either in the process of or has been |
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* removed from the system. Any asynchronous events scheduled for this |
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* device should exit without taking any action. |
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* |
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* Nothing outside of the driver core should ever touch these fields. |
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*/ |
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struct device_private { |
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struct klist klist_children; |
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struct klist_node knode_parent; |
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struct klist_node knode_driver; |
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struct klist_node knode_bus; |
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struct klist_node knode_class; |
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struct list_head deferred_probe; |
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struct device_driver *async_driver; |
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char *deferred_probe_reason; |
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struct device *device; |
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u8 dead:1; |
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}; |
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#define to_device_private_parent(obj) \ |
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container_of(obj, struct device_private, knode_parent) |
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#define to_device_private_driver(obj) \ |
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container_of(obj, struct device_private, knode_driver) |
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#define to_device_private_bus(obj) \ |
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container_of(obj, struct device_private, knode_bus) |
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#define to_device_private_class(obj) \ |
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container_of(obj, struct device_private, knode_class) |
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/* initialisation functions */ |
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extern int devices_init(void); |
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extern int buses_init(void); |
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extern int classes_init(void); |
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extern int firmware_init(void); |
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#ifdef CONFIG_SYS_HYPERVISOR |
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extern int hypervisor_init(void); |
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#else |
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static inline int hypervisor_init(void) { return 0; } |
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#endif |
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extern int platform_bus_init(void); |
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extern void cpu_dev_init(void); |
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extern void container_dev_init(void); |
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#ifdef CONFIG_AUXILIARY_BUS |
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extern void auxiliary_bus_init(void); |
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#else |
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static inline void auxiliary_bus_init(void) { } |
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#endif |
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struct kobject *virtual_device_parent(struct device *dev); |
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extern int bus_add_device(struct device *dev); |
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extern void bus_probe_device(struct device *dev); |
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extern void bus_remove_device(struct device *dev); |
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extern int bus_add_driver(struct device_driver *drv); |
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extern void bus_remove_driver(struct device_driver *drv); |
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extern void device_release_driver_internal(struct device *dev, |
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struct device_driver *drv, |
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struct device *parent); |
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extern void driver_detach(struct device_driver *drv); |
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extern void driver_deferred_probe_del(struct device *dev); |
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extern void device_set_deferred_probe_reason(const struct device *dev, |
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struct va_format *vaf); |
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static inline int driver_match_device(struct device_driver *drv, |
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struct device *dev) |
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{ |
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return drv->bus->match ? drv->bus->match(dev, drv) : 1; |
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} |
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extern bool driver_allows_async_probing(struct device_driver *drv); |
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extern int driver_add_groups(struct device_driver *drv, |
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const struct attribute_group **groups); |
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extern void driver_remove_groups(struct device_driver *drv, |
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const struct attribute_group **groups); |
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void device_driver_detach(struct device *dev); |
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extern char *make_class_name(const char *name, struct kobject *kobj); |
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extern int devres_release_all(struct device *dev); |
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extern void device_block_probing(void); |
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extern void device_unblock_probing(void); |
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/* /sys/devices directory */ |
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extern struct kset *devices_kset; |
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extern void devices_kset_move_last(struct device *dev); |
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#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS) |
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extern void module_add_driver(struct module *mod, struct device_driver *drv); |
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extern void module_remove_driver(struct device_driver *drv); |
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#else |
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static inline void module_add_driver(struct module *mod, |
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struct device_driver *drv) { } |
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static inline void module_remove_driver(struct device_driver *drv) { } |
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#endif |
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#ifdef CONFIG_DEVTMPFS |
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extern int devtmpfs_init(void); |
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#else |
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static inline int devtmpfs_init(void) { return 0; } |
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#endif |
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/* Device links support */ |
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extern int device_links_read_lock(void); |
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extern void device_links_read_unlock(int idx); |
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extern int device_links_read_lock_held(void); |
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extern int device_links_check_suppliers(struct device *dev); |
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extern void device_links_force_bind(struct device *dev); |
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extern void device_links_driver_bound(struct device *dev); |
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extern void device_links_driver_cleanup(struct device *dev); |
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extern void device_links_no_driver(struct device *dev); |
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extern bool device_links_busy(struct device *dev); |
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extern void device_links_unbind_consumers(struct device *dev); |
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extern void fw_devlink_drivers_done(void); |
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/* device pm support */ |
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void device_pm_move_to_tail(struct device *dev); |
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#ifdef CONFIG_DEVTMPFS |
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int devtmpfs_create_node(struct device *dev); |
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int devtmpfs_delete_node(struct device *dev); |
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#else |
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static inline int devtmpfs_create_node(struct device *dev) { return 0; } |
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static inline int devtmpfs_delete_node(struct device *dev) { return 0; } |
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#endif |
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void software_node_notify(struct device *dev); |
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void software_node_notify_remove(struct device *dev);
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