mirror of
https://github.com/torvalds/linux.git
synced 2024-11-28 15:11:31 +00:00
d03c720e03
Tests for drivers often require a struct device to pass to other functions. While it's possible to create these with root_device_register(), or to use something like a platform device, this is both a misuse of those APIs, and can be difficult to clean up after, for example, a failed assertion. Add some KUnit-specific functions for registering and unregistering a struct device: - kunit_device_register() - kunit_device_register_with_driver() - kunit_device_unregister() These helpers allocate a on a 'kunit' bus which will either probe the driver passed in (kunit_device_register_with_driver), or will create a stub driver (kunit_device_register) which is cleaned up on test shutdown. Devices are automatically unregistered on test shutdown, but can be manually unregistered earlier with kunit_device_unregister() in order to, for example, test device release code. Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com> Reviewed-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: David Gow <davidgow@google.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* KUnit basic device implementation
|
|
*
|
|
* Helpers for creating and managing fake devices for KUnit tests.
|
|
*
|
|
* Copyright (C) 2023, Google LLC.
|
|
* Author: David Gow <davidgow@google.com>
|
|
*/
|
|
|
|
#ifndef _KUNIT_DEVICE_H
|
|
#define _KUNIT_DEVICE_H
|
|
|
|
#if IS_ENABLED(CONFIG_KUNIT)
|
|
|
|
#include <kunit/test.h>
|
|
|
|
struct device;
|
|
struct device_driver;
|
|
|
|
/**
|
|
* kunit_driver_create() - Create a struct device_driver attached to the kunit_bus
|
|
* @test: The test context object.
|
|
* @name: The name to give the created driver.
|
|
*
|
|
* Creates a struct device_driver attached to the kunit_bus, with the name @name.
|
|
* This driver will automatically be cleaned up on test exit.
|
|
*
|
|
* Return: a stub struct device_driver, managed by KUnit, with the name @name.
|
|
*/
|
|
struct device_driver *kunit_driver_create(struct kunit *test, const char *name);
|
|
|
|
/**
|
|
* kunit_device_register() - Create a struct device for use in KUnit tests
|
|
* @test: The test context object.
|
|
* @name: The name to give the created device.
|
|
*
|
|
* Creates a struct kunit_device (which is a struct device) with the given name,
|
|
* and a corresponding driver. The device and driver will be cleaned up on test
|
|
* exit, or when kunit_device_unregister is called. See also
|
|
* kunit_device_register_with_driver, if you wish to provide your own
|
|
* struct device_driver.
|
|
*
|
|
* Return: a pointer to a struct device which will be cleaned up when the test
|
|
* exits, or an error pointer if the device could not be allocated or registered.
|
|
*/
|
|
struct device *kunit_device_register(struct kunit *test, const char *name);
|
|
|
|
/**
|
|
* kunit_device_register_with_driver() - Create a struct device for use in KUnit tests
|
|
* @test: The test context object.
|
|
* @name: The name to give the created device.
|
|
* @drv: The struct device_driver to associate with the device.
|
|
*
|
|
* Creates a struct kunit_device (which is a struct device) with the given
|
|
* name, and driver. The device will be cleaned up on test exit, or when
|
|
* kunit_device_unregister is called. See also kunit_device_register, if you
|
|
* wish KUnit to create and manage a driver for you.
|
|
*
|
|
* Return: a pointer to a struct device which will be cleaned up when the test
|
|
* exits, or an error pointer if the device could not be allocated or registered.
|
|
*/
|
|
struct device *kunit_device_register_with_driver(struct kunit *test,
|
|
const char *name,
|
|
const struct device_driver *drv);
|
|
|
|
/**
|
|
* kunit_device_unregister() - Unregister a KUnit-managed device
|
|
* @test: The test context object which created the device
|
|
* @dev: The device.
|
|
*
|
|
* Unregisters and destroys a struct device which was created with
|
|
* kunit_device_register or kunit_device_register_with_driver. If KUnit created
|
|
* a driver, cleans it up as well.
|
|
*/
|
|
void kunit_device_unregister(struct kunit *test, struct device *dev);
|
|
|
|
#endif
|
|
|
|
#endif
|