diff options
Diffstat (limited to 'drivers/base/base.h')
| -rw-r--r-- | drivers/base/base.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h new file mode 100644 index 000000000..559b047de --- /dev/null +++ b/drivers/base/base.h @@ -0,0 +1,168 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#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 + * @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. + * @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 list_head deferred_probe; + 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) + +/* 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); + +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 int driver_probe_device(struct device_driver *drv, struct device *dev); +extern void driver_deferred_probe_del(struct device *dev); +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); + +extern char *make_class_name(const char *name, struct kobject *kobj); + +extern int devres_release_all(struct device *dev); +extern void device_block_probing(void); +extern void device_unblock_probing(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_check_suppliers(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); + +/* device pm support */ +void device_pm_move_to_tail(struct device *dev); |