1 #include <linux/notifier.h> 2 3 /** 4 * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure. 5 * 6 * @subsys - the struct kset that defines this subsystem 7 * @devices_kset - the subsystem's 'devices' directory 8 * @interfaces - list of subsystem interfaces associated 9 * @mutex - protect the devices, and interfaces lists. 10 * 11 * @drivers_kset - the list of drivers associated 12 * @klist_devices - the klist to iterate over the @devices_kset 13 * @klist_drivers - the klist to iterate over the @drivers_kset 14 * @bus_notifier - the bus notifier list for anything that cares about things 15 * on this bus. 16 * @bus - pointer back to the struct bus_type that this structure is associated 17 * with. 18 * 19 * @glue_dirs - "glue" directory to put in-between the parent device to 20 * avoid namespace conflicts 21 * @class - pointer back to the struct class that this structure is associated 22 * with. 23 * 24 * This structure is the one that is the actual kobject allowing struct 25 * bus_type/class to be statically allocated safely. Nothing outside of the 26 * driver core should ever touch these fields. 27 */ 28 struct subsys_private { 29 struct kset subsys; 30 struct kset *devices_kset; 31 struct list_head interfaces; 32 struct mutex mutex; 33 34 struct kset *drivers_kset; 35 struct klist klist_devices; 36 struct klist klist_drivers; 37 struct blocking_notifier_head bus_notifier; 38 unsigned int drivers_autoprobe:1; 39 struct bus_type *bus; 40 41 struct kset glue_dirs; 42 struct class *class; 43 }; 44 #define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj) 45 46 struct driver_private { 47 struct kobject kobj; 48 struct klist klist_devices; 49 struct klist_node knode_bus; 50 struct module_kobject *mkobj; 51 struct device_driver *driver; 52 }; 53 #define to_driver(obj) container_of(obj, struct driver_private, kobj) 54 55 /** 56 * struct device_private - structure to hold the private to the driver core portions of the device structure. 57 * 58 * @klist_children - klist containing all children of this device 59 * @knode_parent - node in sibling list 60 * @knode_driver - node in driver list 61 * @knode_bus - node in bus list 62 * @deferred_probe - entry in deferred_probe_list which is used to retry the 63 * binding of drivers which were unable to get all the resources needed by 64 * the device; typically because it depends on another driver getting 65 * probed first. 66 * @device - pointer back to the struct device that this structure is 67 * associated with. 68 * 69 * Nothing outside of the driver core should ever touch these fields. 70 */ 71 struct device_private { 72 struct klist klist_children; 73 struct klist_node knode_parent; 74 struct klist_node knode_driver; 75 struct klist_node knode_bus; 76 struct list_head deferred_probe; 77 struct device *device; 78 }; 79 #define to_device_private_parent(obj) \ 80 container_of(obj, struct device_private, knode_parent) 81 #define to_device_private_driver(obj) \ 82 container_of(obj, struct device_private, knode_driver) 83 #define to_device_private_bus(obj) \ 84 container_of(obj, struct device_private, knode_bus) 85 86 extern int device_private_init(struct device *dev); 87 88 /* initialisation functions */ 89 extern int devices_init(void); 90 extern int buses_init(void); 91 extern int classes_init(void); 92 extern int firmware_init(void); 93 #ifdef CONFIG_SYS_HYPERVISOR 94 extern int hypervisor_init(void); 95 #else 96 static inline int hypervisor_init(void) { return 0; } 97 #endif 98 extern int platform_bus_init(void); 99 extern void cpu_dev_init(void); 100 extern void container_dev_init(void); 101 102 struct kobject *virtual_device_parent(struct device *dev); 103 104 extern int bus_add_device(struct device *dev); 105 extern void bus_probe_device(struct device *dev); 106 extern void bus_remove_device(struct device *dev); 107 108 extern int bus_add_driver(struct device_driver *drv); 109 extern void bus_remove_driver(struct device_driver *drv); 110 extern void device_release_driver_internal(struct device *dev, 111 struct device_driver *drv, 112 struct device *parent); 113 114 extern void driver_detach(struct device_driver *drv); 115 extern int driver_probe_device(struct device_driver *drv, struct device *dev); 116 extern void driver_deferred_probe_del(struct device *dev); 117 static inline int driver_match_device(struct device_driver *drv, 118 struct device *dev) 119 { 120 return drv->bus->match ? drv->bus->match(dev, drv) : 1; 121 } 122 extern bool driver_allows_async_probing(struct device_driver *drv); 123 124 extern int driver_add_groups(struct device_driver *drv, 125 const struct attribute_group **groups); 126 extern void driver_remove_groups(struct device_driver *drv, 127 const struct attribute_group **groups); 128 129 extern int device_add_groups(struct device *dev, 130 const struct attribute_group **groups); 131 extern void device_remove_groups(struct device *dev, 132 const struct attribute_group **groups); 133 134 extern char *make_class_name(const char *name, struct kobject *kobj); 135 136 extern int devres_release_all(struct device *dev); 137 extern void device_block_probing(void); 138 extern void device_unblock_probing(void); 139 140 /* /sys/devices directory */ 141 extern struct kset *devices_kset; 142 extern void devices_kset_move_last(struct device *dev); 143 144 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS) 145 extern void module_add_driver(struct module *mod, struct device_driver *drv); 146 extern void module_remove_driver(struct device_driver *drv); 147 #else 148 static inline void module_add_driver(struct module *mod, 149 struct device_driver *drv) { } 150 static inline void module_remove_driver(struct device_driver *drv) { } 151 #endif 152 153 #ifdef CONFIG_DEVTMPFS 154 extern int devtmpfs_init(void); 155 #else 156 static inline int devtmpfs_init(void) { return 0; } 157 #endif 158 159 /* Device links support */ 160 extern int device_links_read_lock(void); 161 extern void device_links_read_unlock(int idx); 162 extern int device_links_check_suppliers(struct device *dev); 163 extern void device_links_driver_bound(struct device *dev); 164 extern void device_links_driver_cleanup(struct device *dev); 165 extern void device_links_no_driver(struct device *dev); 166 extern bool device_links_busy(struct device *dev); 167 extern void device_links_unbind_consumers(struct device *dev); 168