/* 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 _UAPI_LINUX_STM_H
#define _UAPI_LINUX_STM_H
#include <linux/types.h>
/* Maximum allowed master and channel values */
#define STP_MASTER_MAX 0 xffff
#define STP_CHANNEL_MAX 0 xffff
/**
* 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[];
};
#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 /* _UAPI_LINUX_STM_H */
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