| /* 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 */ |
