include/linux/wmi.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * wmi.h - ACPI WMI interface
0004  *
0005  * Copyright (c) 2015 Andrew Lutomirski
0006  */
0007
0008 #ifndef _LINUX_WMI_H
0009 #define _LINUX_WMI_H
0010
0011 #include <linux/device.h>
0012 #include <linux/acpi.h>
0013 #include <linux/mod_devicetable.h>
0014 #include <uapi/linux/wmi.h>
0015
0016 struct wmi_device {
0017     struct device dev;
0018
0019      /* True for data blocks implementing the Set Control Method */
0020     bool setable;
0021 };
0022
0023 /* evaluate the ACPI method associated with this device */
0024 extern acpi_status wmidev_evaluate_method(struct wmi_device *wdev,
0025                       u8 instance, u32 method_id,
0026                       const struct acpi_buffer *in,
0027                       struct acpi_buffer *out);
0028
0029 /* Caller must kfree the result. */
0030 extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
0031                          u8 instance);
0032
0033 extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
0034
0035 struct wmi_driver {
0036     struct device_driver driver;
0037     const struct wmi_device_id *id_table;
0038     bool no_notify_data;
0039
0040     int (*probe)(struct wmi_device *wdev, const void *context);
0041     void (*remove)(struct wmi_device *wdev);
0042     void (*notify)(struct wmi_device *device, union acpi_object *data);
0043     long (*filter_callback)(struct wmi_device *wdev, unsigned int cmd,
0044                 struct wmi_ioctl_buffer *arg);
0045 };
0046
0047 extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
0048                           struct module *owner);
0049 extern void wmi_driver_unregister(struct wmi_driver *driver);
0050 #define wmi_driver_register(driver) __wmi_driver_register((driver), THIS_MODULE)
0051
0052 #define module_wmi_driver(__wmi_driver) \
0053     module_driver(__wmi_driver, wmi_driver_register, \
0054               wmi_driver_unregister)
0055
0056 #endif