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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 
/* 
 * System Trace Module (STM) userspace interfaces 
 * Copyright (c) 2014, Intel Corporation. 
 * 
 * STM class implements generic infrastructure for  System Trace Module devices 
 * as defined in MIPI STPv2 specification. 
 */ 
 
#ifndef _LINUX_STM_H 
#define _LINUX_STM_H 
 
#include <linux/types.h> 
 
/* Maximum allowed master and channel values */ 
#define STP_MASTER_MAX	0xffff 
#define STP_CHANNEL_MAX	0xffff 
 
/** 
 * struct stp_policy_id - identification for the STP policy 
 * @size:	size of the structure including real id[] length 
 * @master:	assigned master 
 * @channel:	first assigned channel 
 * @width:	number of requested channels 
 * @id:		identification string 
 * 
 * User must calculate the total size of the structure and put it into 
 * @size field, fill out the @id and desired @width. In return, kernel 
 * fills out @master, @channel and @width. 
 */ 
struct stp_policy_id { 
	__u32		size; 
	__u16		master; 
	__u16		channel; 
	__u16		width; 
	/* padding */ 
	__u16		__reserved_0; 
	__u32		__reserved_1; 
	char		id[0]; 
}; 
 
#define STP_POLICY_ID_SET	_IOWR('%', 0, struct stp_policy_id) 
#define STP_POLICY_ID_GET	_IOR('%', 1, struct stp_policy_id) 
#define STP_SET_OPTIONS		_IOW('%', 2, __u64) 
 
#endif /* _LINUX_STM_H */