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 * @driver_data - private pointer for driver specific info. Will turn into a 67 * list soon. 68 * @device - pointer back to the struct class that this structure is 69 * associated with. 70 * 71 * Nothing outside of the driver core should ever touch these fields. 72 */ 73 struct device_private { 74 struct klist klist_children; 75 struct klist_node knode_parent; 76 struct klist_node knode_driver; 77 struct klist_node knode_bus; 78 struct list_head deferred_probe; 79 void *driver_data; 80 struct device *device; 81 }; 82 #define to_device_private_parent(obj) \ 83 container_of(obj, struct device_private, knode_parent) 84 #define to_device_private_driver(obj) \ 85 container_of(obj, struct device_private, knode_driver) 86 #define to_device_private_bus(obj) \ 87 container_of(obj, struct device_private, knode_bus) 88 89 extern int device_private_init(struct device *dev); 90 91 /* initialisation functions */ 92 extern int devices_init(void); 93 extern int buses_init(void); 94 extern int classes_init(void); 95 extern int firmware_init(void); 96 #ifdef CONFIG_SYS_HYPERVISOR 97 extern int hypervisor_init(void); 98 #else 99 static inline int hypervisor_init(void) { return 0; } 100 #endif 101 extern int platform_bus_init(void); 102 extern void cpu_dev_init(void); 103 extern void container_dev_init(void); 104 105 struct kobject *virtual_device_parent(struct device *dev); 106 107 extern int bus_add_device(struct device *dev); 108 extern void bus_probe_device(struct device *dev); 109 extern void bus_remove_device(struct device *dev); 110 111 extern int bus_add_driver(struct device_driver *drv); 112 extern void bus_remove_driver(struct device_driver *drv); 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 } 122 123 extern int driver_add_groups(struct device_driver *drv, 124 const struct attribute_group **groups); 125 extern void driver_remove_groups(struct device_driver *drv, 126 const struct attribute_group **groups); 127 128 extern int device_add_groups(struct device *dev, 129 const struct attribute_group **groups); 130 extern void device_remove_groups(struct device *dev, 131 const struct attribute_group **groups); 132 133 extern char *make_class_name(const char *name, struct kobject *kobj); 134 135 extern int devres_release_all(struct device *dev); 136 137 /* /sys/devices directory */ 138 extern struct kset *devices_kset; 139 140 #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS) 141 extern void module_add_driver(struct module *mod, struct device_driver *drv); 142 extern void module_remove_driver(struct device_driver *drv); 143 #else 144 static inline void module_add_driver(struct module *mod, 145 struct device_driver *drv) { } 146 static inline void module_remove_driver(struct device_driver *drv) { } 147 #endif 148 149 #ifdef CONFIG_DEVTMPFS 150 extern int devtmpfs_init(void); 151 #else 152 static inline int devtmpfs_init(void) { return 0; } 153 #endif 154