name : surface_acpi_notify.h /* SPDX-License-Identifier: GPL-2.0+ */ /* * Interface for Surface ACPI Notify (SAN) driver. * * Provides access to discrete GPU notifications sent from ACPI via the SAN * driver, which are not handled by this driver directly. * * Copyright (C) 2019-2020 Maximilian Luz <luzmaximilian@gmail.com> */ #ifndef _LINUX_SURFACE_ACPI_NOTIFY_H #define _LINUX_SURFACE_ACPI_NOTIFY_H #include <linux/notifier.h> #include <linux/types.h> /** * struct san_dgpu_event - Discrete GPU ACPI event. * @category: Category of the event. * @target: Target ID of the event source. * @command: Command ID of the event. * @instance: Instance ID of the event source. * @length: Length of the event's payload data (in bytes). * @payload: Pointer to the event's payload data. */ struct san_dgpu_event { u8 category; u8 target; u8 command; u8 instance; u16 length; u8 *payload; }; int san_client_link(struct device *client); int san_dgpu_notifier_register(struct notifier_block *nb); int san_dgpu_notifier_unregister(struct notifier_block *nb); #endif /* _LINUX_SURFACE_ACPI_NOTIFY_H */