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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
ba33162a | 2 | #include <linux/notifier.h> |
a1bdc7aa | 3 | |
c6f7e72a | 4 | /** |
6b6e39a6 | 5 | * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure. |
c6f7e72a | 6 | * |
6b6e39a6 | 7 | * @subsys - the struct kset that defines this subsystem |
ca22e56d KS |
8 | * @devices_kset - the subsystem's 'devices' directory |
9 | * @interfaces - list of subsystem interfaces associated | |
10 | * @mutex - protect the devices, and interfaces lists. | |
6b6e39a6 KS |
11 | * |
12 | * @drivers_kset - the list of drivers associated | |
c6f7e72a GKH |
13 | * @klist_devices - the klist to iterate over the @devices_kset |
14 | * @klist_drivers - the klist to iterate over the @drivers_kset | |
15 | * @bus_notifier - the bus notifier list for anything that cares about things | |
6b6e39a6 | 16 | * on this bus. |
c6f7e72a | 17 | * @bus - pointer back to the struct bus_type that this structure is associated |
6b6e39a6 KS |
18 | * with. |
19 | * | |
6b6e39a6 KS |
20 | * @glue_dirs - "glue" directory to put in-between the parent device to |
21 | * avoid namespace conflicts | |
6b6e39a6 KS |
22 | * @class - pointer back to the struct class that this structure is associated |
23 | * with. | |
c6f7e72a GKH |
24 | * |
25 | * This structure is the one that is the actual kobject allowing struct | |
6b6e39a6 KS |
26 | * bus_type/class to be statically allocated safely. Nothing outside of the |
27 | * driver core should ever touch these fields. | |
c6f7e72a | 28 | */ |
6b6e39a6 | 29 | struct subsys_private { |
c6f7e72a | 30 | struct kset subsys; |
c6f7e72a | 31 | struct kset *devices_kset; |
ca22e56d KS |
32 | struct list_head interfaces; |
33 | struct mutex mutex; | |
6b6e39a6 KS |
34 | |
35 | struct kset *drivers_kset; | |
c6f7e72a GKH |
36 | struct klist klist_devices; |
37 | struct klist klist_drivers; | |
38 | struct blocking_notifier_head bus_notifier; | |
39 | unsigned int drivers_autoprobe:1; | |
40 | struct bus_type *bus; | |
6b6e39a6 | 41 | |
6b6e39a6 | 42 | struct kset glue_dirs; |
6b6e39a6 | 43 | struct class *class; |
c6f7e72a | 44 | }; |
6b6e39a6 | 45 | #define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj) |
c6f7e72a | 46 | |
e5dd1278 GKH |
47 | struct driver_private { |
48 | struct kobject kobj; | |
49 | struct klist klist_devices; | |
50 | struct klist_node knode_bus; | |
51 | struct module_kobject *mkobj; | |
52 | struct device_driver *driver; | |
53 | }; | |
54 | #define to_driver(obj) container_of(obj, struct driver_private, kobj) | |
a1bdc7aa | 55 | |
fb069a5d GKH |
56 | /** |
57 | * struct device_private - structure to hold the private to the driver core portions of the device structure. | |
58 | * | |
f791b8c8 GKH |
59 | * @klist_children - klist containing all children of this device |
60 | * @knode_parent - node in sibling list | |
8940b4f3 | 61 | * @knode_driver - node in driver list |
ae1b4171 | 62 | * @knode_bus - node in bus list |
570d0200 | 63 | * @knode_class - node in class list |
ef8a3fd6 GKH |
64 | * @deferred_probe - entry in deferred_probe_list which is used to retry the |
65 | * binding of drivers which were unable to get all the resources needed by | |
66 | * the device; typically because it depends on another driver getting | |
67 | * probed first. | |
ef0ff683 | 68 | * @async_driver - pointer to device driver awaiting probe via async_probe |
82b2c3c5 | 69 | * @device - pointer back to the struct device that this structure is |
fb069a5d | 70 | * associated with. |
3451a495 AD |
71 | * @dead - This device is currently either in the process of or has been |
72 | * removed from the system. Any asynchronous events scheduled for this | |
73 | * device should exit without taking any action. | |
fb069a5d GKH |
74 | * |
75 | * Nothing outside of the driver core should ever touch these fields. | |
76 | */ | |
77 | struct device_private { | |
f791b8c8 GKH |
78 | struct klist klist_children; |
79 | struct klist_node knode_parent; | |
8940b4f3 | 80 | struct klist_node knode_driver; |
ae1b4171 | 81 | struct klist_node knode_bus; |
570d0200 | 82 | struct klist_node knode_class; |
ef8a3fd6 | 83 | struct list_head deferred_probe; |
ef0ff683 | 84 | struct device_driver *async_driver; |
fb069a5d | 85 | struct device *device; |
3451a495 | 86 | u8 dead:1; |
fb069a5d | 87 | }; |
f791b8c8 GKH |
88 | #define to_device_private_parent(obj) \ |
89 | container_of(obj, struct device_private, knode_parent) | |
8940b4f3 GKH |
90 | #define to_device_private_driver(obj) \ |
91 | container_of(obj, struct device_private, knode_driver) | |
ae1b4171 GKH |
92 | #define to_device_private_bus(obj) \ |
93 | container_of(obj, struct device_private, knode_bus) | |
570d0200 WY |
94 | #define to_device_private_class(obj) \ |
95 | container_of(obj, struct device_private, knode_class) | |
fb069a5d | 96 | |
c6f7e72a | 97 | /* initialisation functions */ |
a1bdc7aa BD |
98 | extern int devices_init(void); |
99 | extern int buses_init(void); | |
100 | extern int classes_init(void); | |
101 | extern int firmware_init(void); | |
4039483f MH |
102 | #ifdef CONFIG_SYS_HYPERVISOR |
103 | extern int hypervisor_init(void); | |
104 | #else | |
105 | static inline int hypervisor_init(void) { return 0; } | |
106 | #endif | |
a1bdc7aa | 107 | extern int platform_bus_init(void); |
024f7846 | 108 | extern void cpu_dev_init(void); |
caa73ea1 | 109 | extern void container_dev_init(void); |
a1bdc7aa | 110 | |
d73ce004 TH |
111 | struct kobject *virtual_device_parent(struct device *dev); |
112 | ||
4a3ad20c | 113 | extern int bus_add_device(struct device *dev); |
2023c610 | 114 | extern void bus_probe_device(struct device *dev); |
4a3ad20c | 115 | extern void bus_remove_device(struct device *dev); |
1da177e4 | 116 | |
4a3ad20c GKH |
117 | extern int bus_add_driver(struct device_driver *drv); |
118 | extern void bus_remove_driver(struct device_driver *drv); | |
9ed98953 RW |
119 | extern void device_release_driver_internal(struct device *dev, |
120 | struct device_driver *drv, | |
121 | struct device *parent); | |
1da177e4 | 122 | |
4a3ad20c GKH |
123 | extern void driver_detach(struct device_driver *drv); |
124 | extern int driver_probe_device(struct device_driver *drv, struct device *dev); | |
d1c3414c | 125 | extern void driver_deferred_probe_del(struct device *dev); |
49b420a1 ML |
126 | static inline int driver_match_device(struct device_driver *drv, |
127 | struct device *dev) | |
128 | { | |
5247aecf | 129 | return drv->bus->match ? drv->bus->match(dev, drv) : 1; |
49b420a1 | 130 | } |
765230b5 | 131 | extern bool driver_allows_async_probing(struct device_driver *drv); |
07e4a3e2 | 132 | |
ed0617b5 GKH |
133 | extern int driver_add_groups(struct device_driver *drv, |
134 | const struct attribute_group **groups); | |
135 | extern void driver_remove_groups(struct device_driver *drv, | |
136 | const struct attribute_group **groups); | |
ed88747c AD |
137 | int device_driver_attach(struct device_driver *drv, struct device *dev); |
138 | void device_driver_detach(struct device *dev); | |
ed0617b5 | 139 | |
aa49b913 | 140 | extern char *make_class_name(const char *name, struct kobject *kobj); |
1da177e4 | 141 | |
2a013455 | 142 | extern int devres_release_all(struct device *dev); |
013c074f SG |
143 | extern void device_block_probing(void); |
144 | extern void device_unblock_probing(void); | |
823bccfc | 145 | |
ca22e56d | 146 | /* /sys/devices directory */ |
881c6cfd | 147 | extern struct kset *devices_kset; |
52cdbdd4 | 148 | extern void devices_kset_move_last(struct device *dev); |
c63469a3 | 149 | |
92b42141 | 150 | #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS) |
c63469a3 GKH |
151 | extern void module_add_driver(struct module *mod, struct device_driver *drv); |
152 | extern void module_remove_driver(struct device_driver *drv); | |
153 | #else | |
154 | static inline void module_add_driver(struct module *mod, | |
155 | struct device_driver *drv) { } | |
156 | static inline void module_remove_driver(struct device_driver *drv) { } | |
157 | #endif | |
2b2af54a KS |
158 | |
159 | #ifdef CONFIG_DEVTMPFS | |
160 | extern int devtmpfs_init(void); | |
161 | #else | |
162 | static inline int devtmpfs_init(void) { return 0; } | |
163 | #endif | |
9ed98953 RW |
164 | |
165 | /* Device links support */ | |
166 | extern int device_links_read_lock(void); | |
167 | extern void device_links_read_unlock(int idx); | |
168 | extern int device_links_check_suppliers(struct device *dev); | |
169 | extern void device_links_driver_bound(struct device *dev); | |
170 | extern void device_links_driver_cleanup(struct device *dev); | |
171 | extern void device_links_no_driver(struct device *dev); | |
172 | extern bool device_links_busy(struct device *dev); | |
173 | extern void device_links_unbind_consumers(struct device *dev); | |
494fd7b7 FK |
174 | |
175 | /* device pm support */ | |
176 | void device_pm_move_to_tail(struct device *dev); |