226 lines
7.9 KiB
C
226 lines
7.9 KiB
C
/* 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;
|
|
|
|
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 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);
|
|
void bus_notify(struct device *dev, enum bus_notifier_event value);
|
|
bool bus_is_registered(const struct bus_type *bus);
|
|
|
|
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 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);
|
|
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;
|
|
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);
|