include/linux/wmi.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * wmi.h - ACPI WMI interface
   4  *
   5  * Copyright (c) 2015 Andrew Lutomirski
   6  */
   7
   8 #ifndef _LINUX_WMI_H
   9 #define _LINUX_WMI_H
  10
  11 #include <linux/device.h>
  12 #include <linux/acpi.h>
  13 #include <linux/mod_devicetable.h>
  14 #include <uapi/linux/wmi.h>
  15
  16 struct wmi_device {
  17         struct device dev;
  18
  19          /* True for data blocks implementing the Set Control Method */
  20         bool setable;
  21 };
  22
  23 /* evaluate the ACPI method associated with this device */
  24 extern acpi_status wmidev_evaluate_method(struct wmi_device *wdev,
  25                                           u8 instance, u32 method_id,
  26                                           const struct acpi_buffer *in,
  27                                           struct acpi_buffer *out);
  28
  29 /* Caller must kfree the result. */
  30 extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
  31                                              u8 instance);
  32
  33 extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
  34
  35 struct wmi_driver {
  36         struct device_driver driver;
  37         const struct wmi_device_id *id_table;
  38
  39         int (*probe)(struct wmi_device *wdev, const void *context);
  40         int (*remove)(struct wmi_device *wdev);
  41         void (*notify)(struct wmi_device *device, union acpi_object *data);
  42         long (*filter_callback)(struct wmi_device *wdev, unsigned int cmd,
  43                                 struct wmi_ioctl_buffer *arg);
  44 };
  45
  46 extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
  47                                               struct module *owner);
  48 extern void wmi_driver_unregister(struct wmi_driver *driver);
  49 #define wmi_driver_register(driver) __wmi_driver_register((driver), THIS_MODULE)
  50
  51 #define module_wmi_driver(__wmi_driver) \
  52         module_driver(__wmi_driver, wmi_driver_register, \
  53                       wmi_driver_unregister)
  54
  55 #endif