LXR linux/include/linux/surface_acpi

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * Interface for Surface ACPI Notify (SAN) driver.
   4 *
   5 * Provides access to discrete GPU notifications sent from ACPI via the SAN
   6 * driver, which are not handled by this driver directly.
   7 *
   8 * Copyright (C) 2019-2020 Maximilian Luz <luzmaximilian@gmail.com>
   9 */
  10
  11#ifndef _LINUX_SURFACE_ACPI_NOTIFY_H
  12#define _LINUX_SURFACE_ACPI_NOTIFY_H
  13
  14#include <linux/notifier.h>
  15#include <linux/types.h>
  16
  17/**
  18 * struct san_dgpu_event - Discrete GPU ACPI event.
  19 * @category: Category of the event.
  20 * @target:   Target ID of the event source.
  21 * @command:  Command ID of the event.
  22 * @instance: Instance ID of the event source.
  23 * @length:   Length of the event's payload data (in bytes).
  24 * @payload:  Pointer to the event's payload data.
  25 */
  26struct san_dgpu_event {
  27        u8 category;
  28        u8 target;
  29        u8 command;
  30        u8 instance;
  31        u16 length;
  32        u8 *payload;
  33};
  34
  35int san_client_link(struct device *client);
  36int san_dgpu_notifier_register(struct notifier_block *nb);
  37int san_dgpu_notifier_unregister(struct notifier_block *nb);
  38
  39#endif /* _LINUX_SURFACE_ACPI_NOTIFY_H */
  40