/* 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  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[];
};

#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 */