Fix duplicate atomic_t typedef conflicting with types.h
This commit is contained in:
@@ -0,0 +1,295 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* bus.h - the bus-specific portions of the driver model
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*
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* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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* Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
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* Copyright (c) 2008-2009 Novell Inc.
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* Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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* Copyright (c) 2012-2019 Linux Foundation
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*
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* See Documentation/driver-api/driver-model/ for more information.
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*/
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#ifndef _DEVICE_BUS_H_
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#define _DEVICE_BUS_H_
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#include <linux/kobject.h>
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#include <linux/klist.h>
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#include <linux/pm.h>
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struct device_driver;
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struct fwnode_handle;
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/**
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* struct bus_type - The bus type of the device
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*
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* @name: The name of the bus.
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* @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id).
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* @bus_groups: Default attributes of the bus.
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* @dev_groups: Default attributes of the devices on the bus.
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* @drv_groups: Default attributes of the device drivers on the bus.
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* @match: Called, perhaps multiple times, whenever a new device or driver
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* is added for this bus. It should return a positive value if the
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* given device can be handled by the given driver and zero
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* otherwise. It may also return error code if determining that
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* the driver supports the device is not possible. In case of
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* -EPROBE_DEFER it will queue the device for deferred probing.
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* Note: This callback may be invoked with or without the device
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* lock held.
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* @uevent: Called when a device is added, removed, or a few other things
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* that generate uevents to add the environment variables.
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* @probe: Called when a new device or driver add to this bus, and callback
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* the specific driver's probe to initial the matched device.
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* @sync_state: Called to sync device state to software state after all the
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* state tracking consumers linked to this device (present at
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* the time of late_initcall) have successfully bound to a
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* driver. If the device has no consumers, this function will
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* be called at late_initcall_sync level. If the device has
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* consumers that are never bound to a driver, this function
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* will never get called until they do.
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* @remove: Called when a device removed from this bus.
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* @shutdown: Called at shut-down time to quiesce the device.
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* @irq_get_affinity: Get IRQ affinity mask for the device on this bus.
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*
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* @online: Called to put the device back online (after offlining it).
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* @offline: Called to put the device offline for hot-removal. May fail.
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*
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* @suspend: Called when a device on this bus wants to go to sleep mode.
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* @resume: Called to bring a device on this bus out of sleep mode.
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* @num_vf: Called to find out how many virtual functions a device on this
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* bus supports.
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* @dma_configure: Called to setup DMA configuration on a device on
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* this bus.
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* @dma_cleanup: Called to cleanup DMA configuration on a device on
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* this bus.
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* @pm: Power management operations of this bus, callback the specific
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* device driver's pm-ops.
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* @driver_override: Set to true if this bus supports the driver_override
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* mechanism, which allows userspace to force a specific
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* driver to bind to a device via a sysfs attribute.
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* @need_parent_lock: When probing or removing a device on this bus, the
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* device core should lock the device's parent.
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*
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* A bus is a channel between the processor and one or more devices. For the
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* purposes of the device model, all devices are connected via a bus, even if
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* it is an internal, virtual, "platform" bus. Buses can plug into each other.
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* A USB controller is usually a PCI device, for example. The device model
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* represents the actual connections between buses and the devices they control.
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* A bus is represented by the bus_type structure. It contains the name, the
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* default attributes, the bus' methods, PM operations, and the driver core's
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* private data.
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*/
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struct bus_type {
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const char *name;
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const char *dev_name;
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const struct attribute_group **bus_groups;
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const struct attribute_group **dev_groups;
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const struct attribute_group **drv_groups;
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int (*match)(struct device *dev, const struct device_driver *drv);
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int (*uevent)(const struct device *dev, struct kobj_uevent_env *env);
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int (*probe)(struct device *dev);
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void (*sync_state)(struct device *dev);
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void (*remove)(struct device *dev);
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void (*shutdown)(struct device *dev);
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const struct cpumask *(*irq_get_affinity)(struct device *dev,
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unsigned int irq_vec);
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int (*online)(struct device *dev);
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int (*offline)(struct device *dev);
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int (*suspend)(struct device *dev, pm_message_t state);
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int (*resume)(struct device *dev);
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int (*num_vf)(struct device *dev);
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int (*dma_configure)(struct device *dev);
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void (*dma_cleanup)(struct device *dev);
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const struct dev_pm_ops *pm;
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bool driver_override;
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bool need_parent_lock;
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};
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int __must_check bus_register(const struct bus_type *bus);
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void bus_unregister(const struct bus_type *bus);
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int __must_check bus_rescan_devices(const struct bus_type *bus);
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struct bus_attribute {
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struct attribute attr;
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ssize_t (*show)(const struct bus_type *bus, char *buf);
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ssize_t (*store)(const struct bus_type *bus, const char *buf, size_t count);
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};
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#define BUS_ATTR_RW(_name) \
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struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
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#define BUS_ATTR_RO(_name) \
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struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
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#define BUS_ATTR_WO(_name) \
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struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
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int __must_check bus_create_file(const struct bus_type *bus, struct bus_attribute *attr);
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void bus_remove_file(const struct bus_type *bus, struct bus_attribute *attr);
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/* Matching function type for drivers/base APIs to find a specific device */
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typedef int (*device_match_t)(struct device *dev, const void *data);
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/* Generic device matching functions that all busses can use to match with */
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int device_match_name(struct device *dev, const void *name);
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int device_match_type(struct device *dev, const void *type);
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int device_match_of_node(struct device *dev, const void *np);
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int device_match_fwnode(struct device *dev, const void *fwnode);
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int device_match_devt(struct device *dev, const void *pdevt);
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int device_match_acpi_dev(struct device *dev, const void *adev);
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int device_match_acpi_handle(struct device *dev, const void *handle);
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int device_match_any(struct device *dev, const void *unused);
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/* Device iterating function type for various driver core for_each APIs */
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typedef int (*device_iter_t)(struct device *dev, void *data);
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/* iterator helpers for buses */
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int bus_for_each_dev(const struct bus_type *bus, struct device *start,
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void *data, device_iter_t fn);
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struct device *bus_find_device(const struct bus_type *bus, struct device *start,
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const void *data, device_match_t match);
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struct device *bus_find_device_reverse(const struct bus_type *bus,
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struct device *start, const void *data,
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device_match_t match);
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/**
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* bus_find_device_by_name - device iterator for locating a particular device
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* of a specific name.
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* @bus: bus type
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* @start: Device to begin with
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* @name: name of the device to match
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*/
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static inline struct device *bus_find_device_by_name(const struct bus_type *bus,
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struct device *start,
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const char *name)
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{
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return bus_find_device(bus, start, name, device_match_name);
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}
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/**
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* bus_find_device_by_of_node : device iterator for locating a particular device
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* matching the of_node.
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* @bus: bus type
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* @np: of_node of the device to match.
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*/
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static inline struct device *
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bus_find_device_by_of_node(const struct bus_type *bus, const struct device_node *np)
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{
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return bus_find_device(bus, NULL, np, device_match_of_node);
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}
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/**
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* bus_find_device_by_fwnode : device iterator for locating a particular device
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* matching the fwnode.
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* @bus: bus type
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* @fwnode: fwnode of the device to match.
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*/
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static inline struct device *
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bus_find_device_by_fwnode(const struct bus_type *bus, const struct fwnode_handle *fwnode)
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{
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return bus_find_device(bus, NULL, fwnode, device_match_fwnode);
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}
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/**
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* bus_find_device_by_devt : device iterator for locating a particular device
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* matching the device type.
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* @bus: bus type
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* @devt: device type of the device to match.
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*/
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static inline struct device *bus_find_device_by_devt(const struct bus_type *bus,
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dev_t devt)
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{
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return bus_find_device(bus, NULL, &devt, device_match_devt);
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}
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/**
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* bus_find_next_device - Find the next device after a given device in a
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* given bus.
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* @bus: bus type
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* @cur: device to begin the search with.
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*/
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static inline struct device *
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bus_find_next_device(const struct bus_type *bus,struct device *cur)
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{
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return bus_find_device(bus, cur, NULL, device_match_any);
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}
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struct acpi_device;
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#ifdef CONFIG_ACPI
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/**
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* bus_find_device_by_acpi_dev : device iterator for locating a particular device
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* matching the ACPI COMPANION device.
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* @bus: bus type
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* @adev: ACPI COMPANION device to match.
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*/
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static inline struct device *
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bus_find_device_by_acpi_dev(const struct bus_type *bus, const struct acpi_device *adev)
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{
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return bus_find_device(bus, NULL, adev, device_match_acpi_dev);
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}
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#else
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static inline struct device *
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bus_find_device_by_acpi_dev(const struct bus_type *bus, const struct acpi_device *adev)
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{
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return NULL;
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}
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#endif
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int bus_for_each_drv(const struct bus_type *bus, struct device_driver *start,
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void *data, int (*fn)(struct device_driver *, void *));
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void bus_sort_breadthfirst(const struct bus_type *bus,
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int (*compare)(const struct device *a,
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const struct device *b));
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/*
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* Bus notifiers: Get notified of addition/removal of devices
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* and binding/unbinding of drivers to devices.
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* In the long run, it should be a replacement for the platform
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* notify hooks.
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*/
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struct notifier_block;
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int bus_register_notifier(const struct bus_type *bus, struct notifier_block *nb);
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int bus_unregister_notifier(const struct bus_type *bus, struct notifier_block *nb);
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/**
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* enum bus_notifier_event - Bus Notifier events that have happened
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* @BUS_NOTIFY_ADD_DEVICE: device is added to this bus
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* @BUS_NOTIFY_DEL_DEVICE: device is about to be removed from this bus
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* @BUS_NOTIFY_REMOVED_DEVICE: device is successfully removed from this bus
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* @BUS_NOTIFY_BIND_DRIVER: a driver is about to be bound to this device on this bus
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* @BUS_NOTIFY_BOUND_DRIVER: a driver is successfully bound to this device on this bus
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* @BUS_NOTIFY_UNBIND_DRIVER: a driver is about to be unbound from this device on this bus
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* @BUS_NOTIFY_UNBOUND_DRIVER: a driver is successfully unbound from this device on this bus
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* @BUS_NOTIFY_DRIVER_NOT_BOUND: a driver failed to be bound to this device on this bus
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*
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* These are the value passed to a bus notifier when a specific event happens.
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*
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* Note that bus notifiers are likely to be called with the device lock already
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* held by the driver core, so be careful in any notifier callback as to what
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* you do with the device structure.
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*
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* All bus notifiers are called with the target struct device * as an argument.
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*/
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enum bus_notifier_event {
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BUS_NOTIFY_ADD_DEVICE,
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BUS_NOTIFY_DEL_DEVICE,
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BUS_NOTIFY_REMOVED_DEVICE,
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BUS_NOTIFY_BIND_DRIVER,
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BUS_NOTIFY_BOUND_DRIVER,
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BUS_NOTIFY_UNBIND_DRIVER,
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BUS_NOTIFY_UNBOUND_DRIVER,
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BUS_NOTIFY_DRIVER_NOT_BOUND,
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};
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struct kset *bus_get_kset(const struct bus_type *bus);
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struct device *bus_get_dev_root(const struct bus_type *bus);
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#endif
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@@ -0,0 +1,229 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* The class-specific portions of the driver model
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*
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* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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* Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
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* Copyright (c) 2008-2009 Novell Inc.
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* Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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* Copyright (c) 2012-2019 Linux Foundation
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*
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* See Documentation/driver-api/driver-model/ for more information.
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*/
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#ifndef _DEVICE_CLASS_H_
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#define _DEVICE_CLASS_H_
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#include <linux/kobject.h>
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#include <linux/klist.h>
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#include <linux/pm.h>
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#include <linux/device/bus.h>
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struct device;
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struct fwnode_handle;
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/**
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* struct class - device classes
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* @name: Name of the class.
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* @class_groups: Default attributes of this class.
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* @dev_groups: Default attributes of the devices that belong to the class.
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* @dev_uevent: Called when a device is added, removed from this class, or a
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* few other things that generate uevents to add the environment
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* variables.
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* @devnode: Callback to provide the devtmpfs.
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* @class_release: Called to release this class.
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* @dev_release: Called to release the device.
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* @shutdown_pre: Called at shut-down time before driver shutdown.
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* @ns_type: Callbacks so sysfs can detemine namespaces.
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* @namespace: Namespace of the device belongs to this class.
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* @get_ownership: Allows class to specify uid/gid of the sysfs directories
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* for the devices belonging to the class. Usually tied to
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* device's namespace.
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* @pm: The default device power management operations of this class.
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*
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* A class is a higher-level view of a device that abstracts out low-level
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* implementation details. Drivers may see a SCSI disk or an ATA disk, but,
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* at the class level, they are all simply disks. Classes allow user space
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* to work with devices based on what they do, rather than how they are
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* connected or how they work.
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*/
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struct class {
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const char *name;
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const struct attribute_group *const *class_groups;
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const struct attribute_group *const *dev_groups;
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int (*dev_uevent)(const struct device *dev, struct kobj_uevent_env *env);
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char *(*devnode)(const struct device *dev, umode_t *mode);
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void (*class_release)(const struct class *class);
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void (*dev_release)(struct device *dev);
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int (*shutdown_pre)(struct device *dev);
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const struct kobj_ns_type_operations *ns_type;
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const struct ns_common *(*namespace)(const struct device *dev);
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void (*get_ownership)(const struct device *dev, kuid_t *uid, kgid_t *gid);
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const struct dev_pm_ops *pm;
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};
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struct class_dev_iter {
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struct klist_iter ki;
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const struct device_type *type;
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struct subsys_private *sp;
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};
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int __must_check class_register(const struct class *class);
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void class_unregister(const struct class *class);
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bool class_is_registered(const struct class *class);
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struct class_compat;
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struct class_compat *class_compat_register(const char *name);
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void class_compat_unregister(struct class_compat *cls);
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int class_compat_create_link(struct class_compat *cls, struct device *dev);
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void class_compat_remove_link(struct class_compat *cls, struct device *dev);
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void class_dev_iter_init(struct class_dev_iter *iter, const struct class *class,
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const struct device *start, const struct device_type *type);
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struct device *class_dev_iter_next(struct class_dev_iter *iter);
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void class_dev_iter_exit(struct class_dev_iter *iter);
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int class_for_each_device(const struct class *class, const struct device *start,
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void *data, device_iter_t fn);
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struct device *class_find_device(const struct class *class, const struct device *start,
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const void *data, device_match_t match);
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/**
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* class_find_device_by_name - device iterator for locating a particular device
|
||||
* of a specific name.
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* @class: class type
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* @name: name of the device to match
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*/
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static inline struct device *class_find_device_by_name(const struct class *class,
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const char *name)
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{
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return class_find_device(class, NULL, name, device_match_name);
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}
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|
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/**
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* class_find_device_by_of_node : device iterator for locating a particular device
|
||||
* matching the of_node.
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* @class: class type
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||||
* @np: of_node of the device to match.
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||||
*/
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static inline struct device *class_find_device_by_of_node(const struct class *class,
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const struct device_node *np)
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{
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return class_find_device(class, NULL, np, device_match_of_node);
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||||
}
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||||
|
||||
/**
|
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* class_find_device_by_fwnode : device iterator for locating a particular device
|
||||
* matching the fwnode.
|
||||
* @class: class type
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||||
* @fwnode: fwnode of the device to match.
|
||||
*/
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||||
static inline struct device *class_find_device_by_fwnode(const struct class *class,
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||||
const struct fwnode_handle *fwnode)
|
||||
{
|
||||
return class_find_device(class, NULL, fwnode, device_match_fwnode);
|
||||
}
|
||||
|
||||
/**
|
||||
* class_find_device_by_devt : device iterator for locating a particular device
|
||||
* matching the device type.
|
||||
* @class: class type
|
||||
* @devt: device type of the device to match.
|
||||
*/
|
||||
static inline struct device *class_find_device_by_devt(const struct class *class,
|
||||
dev_t devt)
|
||||
{
|
||||
return class_find_device(class, NULL, &devt, device_match_devt);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_ACPI
|
||||
struct acpi_device;
|
||||
/**
|
||||
* class_find_device_by_acpi_dev : device iterator for locating a particular
|
||||
* device matching the ACPI_COMPANION device.
|
||||
* @class: class type
|
||||
* @adev: ACPI_COMPANION device to match.
|
||||
*/
|
||||
static inline struct device *class_find_device_by_acpi_dev(const struct class *class,
|
||||
const struct acpi_device *adev)
|
||||
{
|
||||
return class_find_device(class, NULL, adev, device_match_acpi_dev);
|
||||
}
|
||||
#else
|
||||
static inline struct device *class_find_device_by_acpi_dev(const struct class *class,
|
||||
const void *adev)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
struct class_attribute {
|
||||
struct attribute attr;
|
||||
ssize_t (*show)(const struct class *class, const struct class_attribute *attr,
|
||||
char *buf);
|
||||
ssize_t (*store)(const struct class *class, const struct class_attribute *attr,
|
||||
const char *buf, size_t count);
|
||||
};
|
||||
|
||||
#define CLASS_ATTR_RW(_name) \
|
||||
struct class_attribute class_attr_##_name = __ATTR_RW(_name)
|
||||
#define CLASS_ATTR_RO(_name) \
|
||||
struct class_attribute class_attr_##_name = __ATTR_RO(_name)
|
||||
#define CLASS_ATTR_WO(_name) \
|
||||
struct class_attribute class_attr_##_name = __ATTR_WO(_name)
|
||||
|
||||
int __must_check class_create_file_ns(const struct class *class, const struct class_attribute *attr,
|
||||
const struct ns_common *ns);
|
||||
void class_remove_file_ns(const struct class *class, const struct class_attribute *attr,
|
||||
const struct ns_common *ns);
|
||||
|
||||
static inline int __must_check class_create_file(const struct class *class,
|
||||
const struct class_attribute *attr)
|
||||
{
|
||||
return class_create_file_ns(class, attr, NULL);
|
||||
}
|
||||
|
||||
static inline void class_remove_file(const struct class *class,
|
||||
const struct class_attribute *attr)
|
||||
{
|
||||
class_remove_file_ns(class, attr, NULL);
|
||||
}
|
||||
|
||||
/* Simple class attribute that is just a static string */
|
||||
struct class_attribute_string {
|
||||
struct class_attribute attr;
|
||||
char *str;
|
||||
};
|
||||
|
||||
/* Currently read-only only */
|
||||
#define _CLASS_ATTR_STRING(_name, _mode, _str) \
|
||||
{ __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
|
||||
#define CLASS_ATTR_STRING(_name, _mode, _str) \
|
||||
struct class_attribute_string class_attr_##_name = \
|
||||
_CLASS_ATTR_STRING(_name, _mode, _str)
|
||||
|
||||
ssize_t show_class_attr_string(const struct class *class, const struct class_attribute *attr,
|
||||
char *buf);
|
||||
|
||||
struct class_interface {
|
||||
struct list_head node;
|
||||
const struct class *class;
|
||||
|
||||
int (*add_dev) (struct device *dev);
|
||||
void (*remove_dev) (struct device *dev);
|
||||
};
|
||||
|
||||
int __must_check class_interface_register(struct class_interface *);
|
||||
void class_interface_unregister(struct class_interface *);
|
||||
|
||||
struct class * __must_check class_create(const char *name);
|
||||
void class_destroy(const struct class *cls);
|
||||
|
||||
#endif /* _DEVICE_CLASS_H_ */
|
||||
@@ -0,0 +1,185 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef _DEVICE_DEVRES_H_
|
||||
#define _DEVICE_DEVRES_H_
|
||||
|
||||
#include <linux/err.h>
|
||||
#include <linux/gfp_types.h>
|
||||
#include <linux/numa.h>
|
||||
#include <linux/overflow.h>
|
||||
#include <linux/stdarg.h>
|
||||
#include <linux/types.h>
|
||||
#include <asm/bug.h>
|
||||
#include <asm/percpu.h>
|
||||
|
||||
struct device;
|
||||
struct device_node;
|
||||
struct resource;
|
||||
|
||||
/* device resource management */
|
||||
typedef void (*dr_release_t)(struct device *dev, void *res);
|
||||
typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data);
|
||||
|
||||
void * __malloc
|
||||
__devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp, int nid, const char *name);
|
||||
#define devres_alloc(release, size, gfp) \
|
||||
__devres_alloc_node(release, size, gfp, NUMA_NO_NODE, #release)
|
||||
#define devres_alloc_node(release, size, gfp, nid) \
|
||||
__devres_alloc_node(release, size, gfp, nid, #release)
|
||||
|
||||
void devres_free(void *res);
|
||||
void devres_add(struct device *dev, void *res);
|
||||
void *devres_find(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
|
||||
void *devres_get(struct device *dev, void *new_res, dr_match_t match, void *match_data);
|
||||
void *devres_remove(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
|
||||
int devres_destroy(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
|
||||
int devres_release(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
|
||||
|
||||
/* devres group */
|
||||
void * __must_check devres_open_group(struct device *dev, void *id, gfp_t gfp);
|
||||
void devres_close_group(struct device *dev, void *id);
|
||||
void devres_remove_group(struct device *dev, void *id);
|
||||
int devres_release_group(struct device *dev, void *id);
|
||||
|
||||
/* managed devm_k.alloc/kfree for device drivers */
|
||||
void * __alloc_size(2)
|
||||
devm_kmalloc(struct device *dev, size_t size, gfp_t gfp);
|
||||
void * __must_check __realloc_size(3)
|
||||
devm_krealloc(struct device *dev, void *ptr, size_t size, gfp_t gfp);
|
||||
static inline void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)
|
||||
{
|
||||
return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
|
||||
}
|
||||
static inline void *devm_kmalloc_array(struct device *dev, size_t n, size_t size, gfp_t flags)
|
||||
{
|
||||
size_t bytes;
|
||||
|
||||
if (unlikely(check_mul_overflow(n, size, &bytes)))
|
||||
return NULL;
|
||||
|
||||
return devm_kmalloc(dev, bytes, flags);
|
||||
}
|
||||
static inline void *devm_kcalloc(struct device *dev, size_t n, size_t size, gfp_t flags)
|
||||
{
|
||||
return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
|
||||
}
|
||||
static inline __realloc_size(3, 4) void * __must_check
|
||||
devm_krealloc_array(struct device *dev, void *p, size_t new_n, size_t new_size, gfp_t flags)
|
||||
{
|
||||
size_t bytes;
|
||||
|
||||
if (unlikely(check_mul_overflow(new_n, new_size, &bytes)))
|
||||
return NULL;
|
||||
|
||||
return devm_krealloc(dev, p, bytes, flags);
|
||||
}
|
||||
|
||||
void devm_kfree(struct device *dev, const void *p);
|
||||
|
||||
void * __realloc_size(3)
|
||||
devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp);
|
||||
const void *
|
||||
devm_kmemdup_const(struct device *dev, const void *src, size_t len, gfp_t gfp);
|
||||
static inline void *devm_kmemdup_array(struct device *dev, const void *src,
|
||||
size_t n, size_t size, gfp_t flags)
|
||||
{
|
||||
return devm_kmemdup(dev, src, size_mul(size, n), flags);
|
||||
}
|
||||
|
||||
char * __malloc
|
||||
devm_kstrdup(struct device *dev, const char *s, gfp_t gfp);
|
||||
const char *devm_kstrdup_const(struct device *dev, const char *s, gfp_t gfp);
|
||||
char * __printf(3, 0) __malloc
|
||||
devm_kvasprintf(struct device *dev, gfp_t gfp, const char *fmt, va_list ap);
|
||||
char * __printf(3, 4) __malloc
|
||||
devm_kasprintf(struct device *dev, gfp_t gfp, const char *fmt, ...);
|
||||
|
||||
/**
|
||||
* devm_alloc_percpu - Resource-managed alloc_percpu
|
||||
* @dev: Device to allocate per-cpu memory for
|
||||
* @type: Type to allocate per-cpu memory for
|
||||
*
|
||||
* Managed alloc_percpu. Per-cpu memory allocated with this function is
|
||||
* automatically freed on driver detach.
|
||||
*
|
||||
* RETURNS:
|
||||
* Pointer to allocated memory on success, NULL on failure.
|
||||
*/
|
||||
#define devm_alloc_percpu(dev, type) \
|
||||
((typeof(type) __percpu *)__devm_alloc_percpu((dev), sizeof(type), __alignof__(type)))
|
||||
|
||||
void __percpu *__devm_alloc_percpu(struct device *dev, size_t size, size_t align);
|
||||
|
||||
unsigned long devm_get_free_pages(struct device *dev, gfp_t gfp_mask, unsigned int order);
|
||||
void devm_free_pages(struct device *dev, unsigned long addr);
|
||||
|
||||
#ifdef CONFIG_HAS_IOMEM
|
||||
|
||||
void __iomem *devm_ioremap_resource(struct device *dev, const struct resource *res);
|
||||
void __iomem *devm_ioremap_resource_wc(struct device *dev, const struct resource *res);
|
||||
|
||||
void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
|
||||
resource_size_t *size);
|
||||
#else
|
||||
|
||||
static inline
|
||||
void __iomem *devm_ioremap_resource(struct device *dev, const struct resource *res)
|
||||
{
|
||||
return IOMEM_ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
static inline
|
||||
void __iomem *devm_ioremap_resource_wc(struct device *dev, const struct resource *res)
|
||||
{
|
||||
return IOMEM_ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
static inline
|
||||
void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
|
||||
resource_size_t *size)
|
||||
{
|
||||
return IOMEM_ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/* allows to add/remove a custom action to devres stack */
|
||||
int devm_remove_action_nowarn(struct device *dev, void (*action)(void *), void *data);
|
||||
|
||||
/**
|
||||
* devm_remove_action() - removes previously added custom action
|
||||
* @dev: Device that owns the action
|
||||
* @action: Function implementing the action
|
||||
* @data: Pointer to data passed to @action implementation
|
||||
*
|
||||
* Removes instance of @action previously added by devm_add_action().
|
||||
* Both action and data should match one of the existing entries.
|
||||
*/
|
||||
static inline
|
||||
void devm_remove_action(struct device *dev, void (*action)(void *), void *data)
|
||||
{
|
||||
WARN_ON(devm_remove_action_nowarn(dev, action, data));
|
||||
}
|
||||
|
||||
void devm_release_action(struct device *dev, void (*action)(void *), void *data);
|
||||
|
||||
int __devm_add_action(struct device *dev, void (*action)(void *), void *data, const char *name);
|
||||
#define devm_add_action(dev, action, data) \
|
||||
__devm_add_action(dev, action, data, #action)
|
||||
|
||||
static inline int __devm_add_action_or_reset(struct device *dev, void (*action)(void *),
|
||||
void *data, const char *name)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = __devm_add_action(dev, action, data, name);
|
||||
if (ret)
|
||||
action(data);
|
||||
|
||||
return ret;
|
||||
}
|
||||
#define devm_add_action_or_reset(dev, action, data) \
|
||||
__devm_add_action_or_reset(dev, action, data, #action)
|
||||
|
||||
bool devm_is_action_added(struct device *dev, void (*action)(void *), void *data);
|
||||
|
||||
#endif /* _DEVICE_DEVRES_H_ */
|
||||
@@ -0,0 +1,300 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* The driver-specific portions of the driver model
|
||||
*
|
||||
* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
|
||||
* Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
|
||||
* Copyright (c) 2008-2009 Novell Inc.
|
||||
* Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
||||
* Copyright (c) 2012-2019 Linux Foundation
|
||||
*
|
||||
* See Documentation/driver-api/driver-model/ for more information.
|
||||
*/
|
||||
|
||||
#ifndef _DEVICE_DRIVER_H_
|
||||
#define _DEVICE_DRIVER_H_
|
||||
|
||||
#include <linux/kobject.h>
|
||||
#include <linux/klist.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/device/bus.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
/**
|
||||
* enum probe_type - device driver probe type to try
|
||||
* Device drivers may opt in for special handling of their
|
||||
* respective probe routines. This tells the core what to
|
||||
* expect and prefer.
|
||||
*
|
||||
* @PROBE_DEFAULT_STRATEGY: Used by drivers that work equally well
|
||||
* whether probed synchronously or asynchronously.
|
||||
* @PROBE_PREFER_ASYNCHRONOUS: Drivers for "slow" devices which
|
||||
* probing order is not essential for booting the system may
|
||||
* opt into executing their probes asynchronously.
|
||||
* @PROBE_FORCE_SYNCHRONOUS: Use this to annotate drivers that need
|
||||
* their probe routines to run synchronously with driver and
|
||||
* device registration (with the exception of -EPROBE_DEFER
|
||||
* handling - re-probing always ends up being done asynchronously).
|
||||
*
|
||||
* Note that the end goal is to switch the kernel to use asynchronous
|
||||
* probing by default, so annotating drivers with
|
||||
* %PROBE_PREFER_ASYNCHRONOUS is a temporary measure that allows us
|
||||
* to speed up boot process while we are validating the rest of the
|
||||
* drivers.
|
||||
*/
|
||||
enum probe_type {
|
||||
PROBE_DEFAULT_STRATEGY,
|
||||
PROBE_PREFER_ASYNCHRONOUS,
|
||||
PROBE_FORCE_SYNCHRONOUS,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct device_driver - The basic device driver structure
|
||||
* @name: Name of the device driver.
|
||||
* @bus: The bus which the device of this driver belongs to.
|
||||
* @owner: The module owner.
|
||||
* @mod_name: Used for built-in modules.
|
||||
* @suppress_bind_attrs: Disables bind/unbind via sysfs.
|
||||
* @probe_type: Type of the probe (synchronous or asynchronous) to use.
|
||||
* @of_match_table: The open firmware table.
|
||||
* @acpi_match_table: The ACPI match table.
|
||||
* @probe: Called to query the existence of a specific device,
|
||||
* whether this driver can work with it, and bind the driver
|
||||
* to a specific 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 the device is removed from the system to
|
||||
* unbind a device from this driver.
|
||||
* @shutdown: Called at shut-down time to quiesce the device.
|
||||
* @suspend: Called to put the device to sleep mode. Usually to a
|
||||
* low power state.
|
||||
* @resume: Called to bring a device from sleep mode.
|
||||
* @groups: Default attributes that get created by the driver core
|
||||
* automatically.
|
||||
* @dev_groups: Additional attributes attached to device instance once
|
||||
* it is bound to the driver.
|
||||
* @pm: Power management operations of the device which matched
|
||||
* this driver.
|
||||
* @coredump: Called when sysfs entry is written to. The device driver
|
||||
* is expected to call the dev_coredump API resulting in a
|
||||
* uevent.
|
||||
* @p: Driver core's private data, no one other than the driver
|
||||
* core can touch this.
|
||||
* @p_cb: Callbacks private to the driver core; no one other than the
|
||||
* driver core is allowed to touch this.
|
||||
*
|
||||
* The device driver-model tracks all of the drivers known to the system.
|
||||
* The main reason for this tracking is to enable the driver core to match
|
||||
* up drivers with new devices. Once drivers are known objects within the
|
||||
* system, however, a number of other things become possible. Device drivers
|
||||
* can export information and configuration variables that are independent
|
||||
* of any specific device.
|
||||
*/
|
||||
struct device_driver {
|
||||
const char *name;
|
||||
const struct bus_type *bus;
|
||||
|
||||
struct module *owner;
|
||||
const char *mod_name; /* used for built-in modules */
|
||||
|
||||
bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
|
||||
enum probe_type probe_type;
|
||||
|
||||
const struct of_device_id *of_match_table;
|
||||
const struct acpi_device_id *acpi_match_table;
|
||||
|
||||
int (*probe) (struct device *dev);
|
||||
void (*sync_state)(struct device *dev);
|
||||
int (*remove) (struct device *dev);
|
||||
void (*shutdown) (struct device *dev);
|
||||
int (*suspend) (struct device *dev, pm_message_t state);
|
||||
int (*resume) (struct device *dev);
|
||||
const struct attribute_group **groups;
|
||||
const struct attribute_group **dev_groups;
|
||||
|
||||
const struct dev_pm_ops *pm;
|
||||
void (*coredump) (struct device *dev);
|
||||
|
||||
struct driver_private *p;
|
||||
struct {
|
||||
/*
|
||||
* Called after remove() and after all devres entries have been
|
||||
* processed. This is a Rust only callback.
|
||||
*/
|
||||
void (*post_unbind_rust)(struct device *dev);
|
||||
} p_cb;
|
||||
};
|
||||
|
||||
|
||||
int __must_check driver_register(struct device_driver *drv);
|
||||
void driver_unregister(struct device_driver *drv);
|
||||
|
||||
struct device_driver *driver_find(const char *name, const struct bus_type *bus);
|
||||
bool __init driver_probe_done(void);
|
||||
void wait_for_device_probe(void);
|
||||
void __init wait_for_init_devices_probe(void);
|
||||
|
||||
/* sysfs interface for exporting driver attributes */
|
||||
|
||||
struct driver_attribute {
|
||||
struct attribute attr;
|
||||
ssize_t (*show)(struct device_driver *driver, char *buf);
|
||||
ssize_t (*store)(struct device_driver *driver, const char *buf,
|
||||
size_t count);
|
||||
};
|
||||
|
||||
#define DRIVER_ATTR_RW(_name) \
|
||||
struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)
|
||||
#define DRIVER_ATTR_RO(_name) \
|
||||
struct driver_attribute driver_attr_##_name = __ATTR_RO(_name)
|
||||
#define DRIVER_ATTR_WO(_name) \
|
||||
struct driver_attribute driver_attr_##_name = __ATTR_WO(_name)
|
||||
|
||||
int __must_check driver_create_file(const struct device_driver *driver,
|
||||
const struct driver_attribute *attr);
|
||||
void driver_remove_file(const struct device_driver *driver,
|
||||
const struct driver_attribute *attr);
|
||||
|
||||
int driver_set_override(struct device *dev, const char **override,
|
||||
const char *s, size_t len);
|
||||
int __must_check driver_for_each_device(struct device_driver *drv, struct device *start,
|
||||
void *data, device_iter_t fn);
|
||||
struct device *driver_find_device(const struct device_driver *drv,
|
||||
struct device *start, const void *data,
|
||||
device_match_t match);
|
||||
|
||||
/**
|
||||
* driver_find_device_by_name - device iterator for locating a particular device
|
||||
* of a specific name.
|
||||
* @drv: the driver we're iterating
|
||||
* @name: name of the device to match
|
||||
*/
|
||||
static inline struct device *driver_find_device_by_name(const struct device_driver *drv,
|
||||
const char *name)
|
||||
{
|
||||
return driver_find_device(drv, NULL, name, device_match_name);
|
||||
}
|
||||
|
||||
/**
|
||||
* driver_find_device_by_of_node- device iterator for locating a particular device
|
||||
* by of_node pointer.
|
||||
* @drv: the driver we're iterating
|
||||
* @np: of_node pointer to match.
|
||||
*/
|
||||
static inline struct device *
|
||||
driver_find_device_by_of_node(const struct device_driver *drv,
|
||||
const struct device_node *np)
|
||||
{
|
||||
return driver_find_device(drv, NULL, np, device_match_of_node);
|
||||
}
|
||||
|
||||
/**
|
||||
* driver_find_device_by_fwnode- device iterator for locating a particular device
|
||||
* by fwnode pointer.
|
||||
* @drv: the driver we're iterating
|
||||
* @fwnode: fwnode pointer to match.
|
||||
*/
|
||||
static inline struct device *
|
||||
driver_find_device_by_fwnode(struct device_driver *drv,
|
||||
const struct fwnode_handle *fwnode)
|
||||
{
|
||||
return driver_find_device(drv, NULL, fwnode, device_match_fwnode);
|
||||
}
|
||||
|
||||
/**
|
||||
* driver_find_device_by_devt- device iterator for locating a particular device
|
||||
* by devt.
|
||||
* @drv: the driver we're iterating
|
||||
* @devt: devt pointer to match.
|
||||
*/
|
||||
static inline struct device *driver_find_device_by_devt(const struct device_driver *drv,
|
||||
dev_t devt)
|
||||
{
|
||||
return driver_find_device(drv, NULL, &devt, device_match_devt);
|
||||
}
|
||||
|
||||
static inline struct device *driver_find_next_device(const struct device_driver *drv,
|
||||
struct device *start)
|
||||
{
|
||||
return driver_find_device(drv, start, NULL, device_match_any);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_ACPI
|
||||
/**
|
||||
* driver_find_device_by_acpi_dev : device iterator for locating a particular
|
||||
* device matching the ACPI_COMPANION device.
|
||||
* @drv: the driver we're iterating
|
||||
* @adev: ACPI_COMPANION device to match.
|
||||
*/
|
||||
static inline struct device *
|
||||
driver_find_device_by_acpi_dev(const struct device_driver *drv,
|
||||
const struct acpi_device *adev)
|
||||
{
|
||||
return driver_find_device(drv, NULL, adev, device_match_acpi_dev);
|
||||
}
|
||||
#else
|
||||
static inline struct device *
|
||||
driver_find_device_by_acpi_dev(const struct device_driver *drv, const void *adev)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
void driver_deferred_probe_add(struct device *dev);
|
||||
int driver_deferred_probe_check_state(struct device *dev);
|
||||
void driver_init(void);
|
||||
|
||||
/**
|
||||
* module_driver() - Helper macro for drivers that don't do anything
|
||||
* special in module init/exit. This eliminates a lot of boilerplate.
|
||||
* Each module may only use this macro once, and calling it replaces
|
||||
* module_init() and module_exit().
|
||||
*
|
||||
* @__driver: driver name
|
||||
* @__register: register function for this driver type
|
||||
* @__unregister: unregister function for this driver type
|
||||
* @...: Additional arguments to be passed to __register and __unregister.
|
||||
*
|
||||
* Use this macro to construct bus specific macros for registering
|
||||
* drivers, and do not use it on its own.
|
||||
*/
|
||||
#define module_driver(__driver, __register, __unregister, ...) \
|
||||
static int __init __driver##_init(void) \
|
||||
{ \
|
||||
return __register(&(__driver) , ##__VA_ARGS__); \
|
||||
} \
|
||||
module_init(__driver##_init); \
|
||||
static void __exit __driver##_exit(void) \
|
||||
{ \
|
||||
__unregister(&(__driver) , ##__VA_ARGS__); \
|
||||
} \
|
||||
module_exit(__driver##_exit);
|
||||
|
||||
/**
|
||||
* builtin_driver() - Helper macro for drivers that don't do anything
|
||||
* special in init and have no exit. This eliminates some boilerplate.
|
||||
* Each driver may only use this macro once, and calling it replaces
|
||||
* device_initcall (or in some cases, the legacy __initcall). This is
|
||||
* meant to be a direct parallel of module_driver() above but without
|
||||
* the __exit stuff that is not used for builtin cases.
|
||||
*
|
||||
* @__driver: driver name
|
||||
* @__register: register function for this driver type
|
||||
* @...: Additional arguments to be passed to __register
|
||||
*
|
||||
* Use this macro to construct bus specific macros for registering
|
||||
* drivers, and do not use it on its own.
|
||||
*/
|
||||
#define builtin_driver(__driver, __register, ...) \
|
||||
static int __init __driver##_init(void) \
|
||||
{ \
|
||||
return __register(&(__driver) , ##__VA_ARGS__); \
|
||||
} \
|
||||
device_initcall(__driver##_init);
|
||||
|
||||
#endif /* _DEVICE_DRIVER_H_ */
|
||||
@@ -0,0 +1,69 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
/*
|
||||
* Copyright (c) 2025 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
||||
* Copyright (c) 2025 The Linux Foundation
|
||||
*
|
||||
* A "simple" faux bus that allows devices to be created and added
|
||||
* automatically to it. This is to be used whenever you need to create a
|
||||
* device that is not associated with any "real" system resources, and do
|
||||
* not want to have to deal with a bus/driver binding logic. It is
|
||||
* intended to be very simple, with only a create and a destroy function
|
||||
* available.
|
||||
*/
|
||||
#ifndef _FAUX_DEVICE_H_
|
||||
#define _FAUX_DEVICE_H_
|
||||
|
||||
#include <linux/container_of.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
/**
|
||||
* struct faux_device - a "faux" device
|
||||
* @dev: internal struct device of the object
|
||||
*
|
||||
* A simple faux device that can be created/destroyed. To be used when a
|
||||
* driver only needs to have a device to "hang" something off. This can be
|
||||
* used for downloading firmware or other basic tasks. Use this instead of
|
||||
* a struct platform_device if the device has no resources assigned to
|
||||
* it at all.
|
||||
*/
|
||||
struct faux_device {
|
||||
struct device dev;
|
||||
};
|
||||
#define to_faux_device(x) container_of_const((x), struct faux_device, dev)
|
||||
|
||||
/**
|
||||
* struct faux_device_ops - a set of callbacks for a struct faux_device
|
||||
* @probe: called when a faux device is probed by the driver core
|
||||
* before the device is fully bound to the internal faux bus
|
||||
* code. If probe succeeds, return 0, otherwise return a
|
||||
* negative error number to stop the probe sequence from
|
||||
* succeeding.
|
||||
* @remove: called when a faux device is removed from the system
|
||||
*
|
||||
* Both @probe and @remove are optional, if not needed, set to NULL.
|
||||
*/
|
||||
struct faux_device_ops {
|
||||
int (*probe)(struct faux_device *faux_dev);
|
||||
void (*remove)(struct faux_device *faux_dev);
|
||||
};
|
||||
|
||||
struct faux_device *faux_device_create(const char *name,
|
||||
struct device *parent,
|
||||
const struct faux_device_ops *faux_ops);
|
||||
struct faux_device *faux_device_create_with_groups(const char *name,
|
||||
struct device *parent,
|
||||
const struct faux_device_ops *faux_ops,
|
||||
const struct attribute_group **groups);
|
||||
void faux_device_destroy(struct faux_device *faux_dev);
|
||||
|
||||
static inline void *faux_device_get_drvdata(const struct faux_device *faux_dev)
|
||||
{
|
||||
return dev_get_drvdata(&faux_dev->dev);
|
||||
}
|
||||
|
||||
static inline void faux_device_set_drvdata(struct faux_device *faux_dev, void *data)
|
||||
{
|
||||
dev_set_drvdata(&faux_dev->dev, data);
|
||||
}
|
||||
|
||||
#endif /* _FAUX_DEVICE_H_ */
|
||||
Reference in New Issue
Block a user