1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * System Trace Module (STM) userspace interfaces
4 * Copyright (c) 2014, Intel Corporation.
5 *
6 * STM class implements generic infrastructure for  System Trace Module devices
7 * as defined in MIPI STPv2 specification.
8 */
9
10#ifndef _UAPI_LINUX_STM_H
11#define _UAPI_LINUX_STM_H
12
13#include <linux/types.h>
14
15/* Maximum allowed master and channel values */
16#define STP_MASTER_MAX	0xffff
17#define STP_CHANNEL_MAX	0xffff
18
19/**
20 * struct stp_policy_id - identification for the STP policy
21 * @size:	size of the structure including real id[] length
22 * @master:	assigned master
23 * @channel:	first assigned channel
24 * @width:	number of requested channels
25 * @id:		identification string
26 *
27 * User must calculate the total size of the structure and put it into
28 * @size field, fill out the @id and desired @width. In return, kernel
29 * fills out @master, @channel and @width.
30 */
31struct stp_policy_id {
32	__u32		size;
33	__u16		master;
34	__u16		channel;
35	__u16		width;
36	/* padding */
37	__u16		__reserved_0;
38	__u32		__reserved_1;
39	char		id[];
40};
41
42#define STP_POLICY_ID_SET	_IOWR('%', 0, struct stp_policy_id)
43#define STP_POLICY_ID_GET	_IOR('%', 1, struct stp_policy_id)
44#define STP_SET_OPTIONS		_IOW('%', 2, __u64)
45
46#endif /* _UAPI_LINUX_STM_H */
47