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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 */