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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-12-09 20:33:01 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-12-16 10:11:12 +0100
commit5aee2bf2629d7db2619110f62b15cf742c116e0b (patch)
tree85f762b3c7612433ca8c2536e44fce59d7b058db /include/linux/device.h
parentaf628aae8640c268938a0c9344b4ec0d102c0a0a (diff)
device.h: move 'struct bus' stuff out to device/bus.h
device.h has everything and the kitchen sink when it comes to struct device things, so split out the struct bus things things to a separate .h file to make things easier to maintain and manage over time. Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Saravana Kannan <saravanak@google.com> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20191209193303.1694546-5-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/device.h')
-rw-r--r--include/linux/device.h265
1 files changed, 1 insertions, 264 deletions
diff --git a/include/linux/device.h b/include/linux/device.h
index 758e7dccfcbb..22fd0b91d0fa 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -26,6 +26,7 @@
#include <linux/uidgid.h>
#include <linux/gfp.h>
#include <linux/overflow.h>
+#include <linux/device/bus.h>
#include <asm/device.h>
struct device;
@@ -35,7 +36,6 @@ struct driver_private;
struct module;
struct class;
struct subsys_private;
-struct bus_type;
struct device_node;
struct fwnode_handle;
struct iommu_ops;
@@ -44,269 +44,6 @@ struct iommu_fwspec;
struct dev_pin_info;
struct iommu_param;
-struct bus_attribute {
- struct attribute attr;
- ssize_t (*show)(struct bus_type *bus, char *buf);
- ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count);
-};
-
-#define BUS_ATTR_RW(_name) \
- struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
-#define BUS_ATTR_RO(_name) \
- struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
-#define BUS_ATTR_WO(_name) \
- struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
-
-extern int __must_check bus_create_file(struct bus_type *,
- struct bus_attribute *);
-extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
-
-/**
- * struct bus_type - The bus type of the device
- *
- * @name: The name of the bus.
- * @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id).
- * @dev_root: Default device to use as the parent.
- * @bus_groups: Default attributes of the bus.
- * @dev_groups: Default attributes of the devices on the bus.
- * @drv_groups: Default attributes of the device drivers on the bus.
- * @match: Called, perhaps multiple times, whenever a new device or driver
- * is added for this bus. It should return a positive value if the
- * given device can be handled by the given driver and zero
- * otherwise. It may also return error code if determining that
- * the driver supports the device is not possible. In case of
- * -EPROBE_DEFER it will queue the device for deferred probing.
- * @uevent: Called when a device is added, removed, or a few other things
- * that generate uevents to add the environment variables.
- * @probe: Called when a new device or driver add to this bus, and callback
- * the specific driver's probe to initial the matched device.
- * @sync_state: Called to sync device state to software state after all the
- * state tracking consumers linked to this device (present at
- * the time of late_initcall) have successfully bound to a
- * driver. If the device has no consumers, this function will
- * be called at late_initcall_sync level. If the device has
- * consumers that are never bound to a driver, this function
- * will never get called until they do.
- * @remove: Called when a device removed from this bus.
- * @shutdown: Called at shut-down time to quiesce the device.
- *
- * @online: Called to put the device back online (after offlining it).
- * @offline: Called to put the device offline for hot-removal. May fail.
- *
- * @suspend: Called when a device on this bus wants to go to sleep mode.
- * @resume: Called to bring a device on this bus out of sleep mode.
- * @num_vf: Called to find out how many virtual functions a device on this
- * bus supports.
- * @dma_configure: Called to setup DMA configuration on a device on
- * this bus.
- * @pm: Power management operations of this bus, callback the specific
- * device driver's pm-ops.
- * @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU
- * driver implementations to a bus and allow the driver to do
- * bus-specific setup
- * @p: The private data of the driver core, only the driver core can
- * touch this.
- * @lock_key: Lock class key for use by the lock validator
- * @need_parent_lock: When probing or removing a device on this bus, the
- * device core should lock the device's parent.
- *
- * A bus is a channel between the processor and one or more devices. For the
- * purposes of the device model, all devices are connected via a bus, even if
- * it is an internal, virtual, "platform" bus. Buses can plug into each other.
- * A USB controller is usually a PCI device, for example. The device model
- * represents the actual connections between buses and the devices they control.
- * A bus is represented by the bus_type structure. It contains the name, the
- * default attributes, the bus' methods, PM operations, and the driver core's
- * private data.
- */
-struct bus_type {
- const char *name;
- const char *dev_name;
- struct device *dev_root;
- const struct attribute_group **bus_groups;
- const struct attribute_group **dev_groups;
- const struct attribute_group **drv_groups;
-
- int (*match)(struct device *dev, struct device_driver *drv);
- int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
- int (*probe)(struct device *dev);
- void (*sync_state)(struct device *dev);
- int (*remove)(struct device *dev);
- void (*shutdown)(struct device *dev);
-
- int (*online)(struct device *dev);
- int (*offline)(struct device *dev);
-
- int (*suspend)(struct device *dev, pm_message_t state);
- int (*resume)(struct device *dev);
-
- int (*num_vf)(struct device *dev);
-
- int (*dma_configure)(struct device *dev);
-
- const struct dev_pm_ops *pm;
-
- const struct iommu_ops *iommu_ops;
-
- struct subsys_private *p;
- struct lock_class_key lock_key;
-
- bool need_parent_lock;
-};
-
-extern int __must_check bus_register(struct bus_type *bus);
-
-extern void bus_unregister(struct bus_type *bus);
-
-extern int __must_check bus_rescan_devices(struct bus_type *bus);
-
-/* iterator helpers for buses */
-struct subsys_dev_iter {
- struct klist_iter ki;
- const struct device_type *type;
-};
-void subsys_dev_iter_init(struct subsys_dev_iter *iter,
- struct bus_type *subsys,
- struct device *start,
- const struct device_type *type);
-struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter);
-void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
-
-int device_match_name(struct device *dev, const void *name);
-int device_match_of_node(struct device *dev, const void *np);
-int device_match_fwnode(struct device *dev, const void *fwnode);
-int device_match_devt(struct device *dev, const void *pdevt);
-int device_match_acpi_dev(struct device *dev, const void *adev);
-int device_match_any(struct device *dev, const void *unused);
-
-int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
- int (*fn)(struct device *dev, void *data));
-struct device *bus_find_device(struct bus_type *bus, struct device *start,
- const void *data,
- int (*match)(struct device *dev, const void *data));
-/**
- * bus_find_device_by_name - device iterator for locating a particular device
- * of a specific name.
- * @bus: bus type
- * @start: Device to begin with
- * @name: name of the device to match
- */
-static inline struct device *bus_find_device_by_name(struct bus_type *bus,
- struct device *start,
- const char *name)
-{
- return bus_find_device(bus, start, name, device_match_name);
-}
-
-/**
- * bus_find_device_by_of_node : device iterator for locating a particular device
- * matching the of_node.
- * @bus: bus type
- * @np: of_node of the device to match.
- */
-static inline struct device *
-bus_find_device_by_of_node(struct bus_type *bus, const struct device_node *np)
-{
- return bus_find_device(bus, NULL, np, device_match_of_node);
-}
-
-/**
- * bus_find_device_by_fwnode : device iterator for locating a particular device
- * matching the fwnode.
- * @bus: bus type
- * @fwnode: fwnode of the device to match.
- */
-static inline struct device *
-bus_find_device_by_fwnode(struct bus_type *bus, const struct fwnode_handle *fwnode)
-{
- return bus_find_device(bus, NULL, fwnode, device_match_fwnode);
-}
-
-/**
- * bus_find_device_by_devt : device iterator for locating a particular device
- * matching the device type.
- * @bus: bus type
- * @devt: device type of the device to match.
- */
-static inline struct device *bus_find_device_by_devt(struct bus_type *bus,
- dev_t devt)
-{
- return bus_find_device(bus, NULL, &devt, device_match_devt);
-}
-
-/**
- * bus_find_next_device - Find the next device after a given device in a
- * given bus.
- * @bus: bus type
- * @cur: device to begin the search with.
- */
-static inline struct device *
-bus_find_next_device(struct bus_type *bus,struct device *cur)
-{
- return bus_find_device(bus, cur, NULL, device_match_any);
-}
-
-#ifdef CONFIG_ACPI
-struct acpi_device;
-
-/**
- * bus_find_device_by_acpi_dev : device iterator for locating a particular device
- * matching the ACPI COMPANION device.
- * @bus: bus type
- * @adev: ACPI COMPANION device to match.
- */
-static inline struct device *
-bus_find_device_by_acpi_dev(struct bus_type *bus, const struct acpi_device *adev)
-{
- return bus_find_device(bus, NULL, adev, device_match_acpi_dev);
-}
-#else
-static inline struct device *
-bus_find_device_by_acpi_dev(struct bus_type *bus, const void *adev)
-{
- return NULL;
-}
-#endif
-
-struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
- struct device *hint);
-int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
- void *data, int (*fn)(struct device_driver *, void *));
-void bus_sort_breadthfirst(struct bus_type *bus,
- int (*compare)(const struct device *a,
- const struct device *b));
-/*
- * Bus notifiers: Get notified of addition/removal of devices
- * and binding/unbinding of drivers to devices.
- * In the long run, it should be a replacement for the platform
- * notify hooks.
- */
-struct notifier_block;
-
-extern int bus_register_notifier(struct bus_type *bus,
- struct notifier_block *nb);
-extern int bus_unregister_notifier(struct bus_type *bus,
- struct notifier_block *nb);
-
-/* All 4 notifers below get called with the target struct device *
- * as an argument. Note that those functions are likely to be called
- * with the device lock held in the core, so be careful.
- */
-#define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */
-#define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device to be removed */
-#define BUS_NOTIFY_REMOVED_DEVICE 0x00000003 /* device removed */
-#define BUS_NOTIFY_BIND_DRIVER 0x00000004 /* driver about to be
- bound */
-#define BUS_NOTIFY_BOUND_DRIVER 0x00000005 /* driver bound to device */
-#define BUS_NOTIFY_UNBIND_DRIVER 0x00000006 /* driver about to be
- unbound */
-#define BUS_NOTIFY_UNBOUND_DRIVER 0x00000007 /* driver is unbound
- from the device */
-#define BUS_NOTIFY_DRIVER_NOT_BOUND 0x00000008 /* driver fails to be bound */
-
-extern struct kset *bus_get_kset(struct bus_type *bus);
-extern struct klist *bus_get_device_klist(struct bus_type *bus);
-
/**
* enum probe_type - device driver probe type to try
* Device drivers may opt in for special handling of their