| 1 | /* SPDX-License-Identifier: GPL-2.0 */
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| 2 | /**
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| 3 | * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure.
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| 4 | *
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| 5 | * @subsys - the struct kset that defines this subsystem
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| 6 | * @devices_kset - the list of devices associated
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| 7 | *
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| 8 | * @drivers_kset - the list of drivers associated
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| 9 | * @klist_devices - the klist to iterate over the @devices_kset
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| 10 | * @klist_drivers - the klist to iterate over the @drivers_kset
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| 11 | * @bus_notifier - the bus notifier list for anything that cares about things
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| 12 | * on this bus.
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| 13 | * @bus - pointer back to the struct bus_type that this structure is associated
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| 14 | * with.
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| 15 | *
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| 16 | * @class_interfaces - list of class_interfaces associated
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| 17 | * @glue_dirs - "glue" directory to put in-between the parent device to
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| 18 | * avoid namespace conflicts
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| 19 | * @class_mutex - mutex to protect the children, devices, and interfaces lists.
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| 20 | * @class - pointer back to the struct class that this structure is associated
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| 21 | * with.
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| 22 | *
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| 23 | * This structure is the one that is the actual kobject allowing struct
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| 24 | * bus_type/class to be statically allocated safely. Nothing outside of the
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| 25 | * driver core should ever touch these fields.
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| 26 | */
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| 27 | struct subsys_private {
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| 28 | struct kset subsys;
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| 29 | struct kset *devices_kset;
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| 30 |
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| 31 | struct kset *drivers_kset;
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| 32 | struct klist klist_devices;
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| 33 | struct klist klist_drivers;
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| 34 | struct blocking_notifier_head bus_notifier;
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| 35 | unsigned int drivers_autoprobe:1;
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| 36 | struct bus_type *bus;
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| 37 |
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| 38 | struct list_head class_interfaces;
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| 39 | struct kset glue_dirs;
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| 40 | struct mutex class_mutex;
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| 41 | struct class *class;
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| 42 | };
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| 43 | #define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj)
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| 44 |
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| 45 |
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| 46 |
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| 47 | struct driver_private {
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| 48 | struct kobject kobj;
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| 49 | struct klist klist_devices;
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| 50 | struct klist_node knode_bus;
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| 51 | struct module_kobject *mkobj;
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| 52 | struct device_driver *driver;
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| 53 | };
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| 54 | #define to_driver(obj) container_of(obj, struct driver_private, kobj)
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| 55 |
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| 56 | /**
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| 57 | * struct device_private - structure to hold the private to the driver core portions of the device structure.
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| 58 | *
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| 59 | * @klist_children - klist containing all children of this device
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| 60 | * @knode_parent - node in sibling list
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| 61 | * @knode_driver - node in driver list
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| 62 | * @knode_bus - node in bus list
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| 63 | * @driver_data - private pointer for driver specific info. Will turn into a
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| 64 | * list soon.
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| 65 | * @device - pointer back to the struct class that this structure is
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| 66 | * associated with.
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| 67 | *
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| 68 | * Nothing outside of the driver core should ever touch these fields.
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| 69 | */
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| 70 | struct device_private {
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| 71 | struct klist klist_children;
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| 72 | struct klist_node knode_parent;
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| 73 | struct klist_node knode_driver;
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| 74 | struct klist_node knode_bus;
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| 75 | void *driver_data;
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| 76 | struct device *device;
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| 77 | };
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| 78 | #define to_device_private_parent(obj) \
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| 79 | container_of(obj, struct device_private, knode_parent)
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| 80 | #define to_device_private_driver(obj) \
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| 81 | container_of(obj, struct device_private, knode_driver)
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| 82 | #define to_device_private_bus(obj) \
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| 83 | container_of(obj, struct device_private, knode_bus)
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| 84 |
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| 85 | extern int device_private_init(struct device *dev);
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| 86 |
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| 87 | /* initialisation functions */
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| 88 | extern int devices_init(void);
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| 89 | extern int buses_init(void);
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| 90 | extern int classes_init(void);
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| 91 | extern int firmware_init(void);
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| 92 | #ifdef CONFIG_SYS_HYPERVISOR
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| 93 | extern int hypervisor_init(void);
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| 94 | #else
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| 95 | static inline int hypervisor_init(void) { return 0; }
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| 96 | #endif
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| 97 | extern int platform_bus_init(void);
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| 98 | extern int system_bus_init(void);
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| 99 | extern int cpu_dev_init(void);
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| 100 |
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| 101 | extern int bus_add_device(struct device *dev);
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| 102 | extern void bus_probe_device(struct device *dev);
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| 103 | extern void bus_remove_device(struct device *dev);
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| 104 |
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| 105 | extern int bus_add_driver(struct device_driver *drv);
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| 106 | extern void bus_remove_driver(struct device_driver *drv);
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| 107 |
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| 108 | extern void driver_detach(struct device_driver *drv);
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| 109 | extern int driver_probe_device(struct device_driver *drv, struct device *dev);
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| 110 | static inline int driver_match_device(struct device_driver *drv,
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| 111 | struct device *dev)
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| 112 | {
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| 113 | return drv->bus->match ? drv->bus->match(dev, drv) : 1;
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| 114 | }
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| 115 |
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| 116 | extern char *make_class_name(const char *name, struct kobject *kobj);
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| 117 |
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| 118 | extern int devres_release_all(struct device *dev);
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| 119 |
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| 120 | extern struct kset *devices_kset;
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| 121 |
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| 122 | #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
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| 123 | extern void module_add_driver(struct module *mod, struct device_driver *drv);
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| 124 | extern void module_remove_driver(struct device_driver *drv);
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| 125 | #else
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| 126 | static inline void module_add_driver(struct module *mod,
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| 127 | struct device_driver *drv) { }
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| 128 | static inline void module_remove_driver(struct device_driver *drv) { }
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| 129 | #endif
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| 130 |
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| 131 | #ifdef CONFIG_DEVTMPFS
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| 132 | extern int devtmpfs_init(void);
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| 133 | #else
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| 134 | static inline int devtmpfs_init(void) { return 0; }
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| 135 | #endif
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