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 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * STM class implements generic infrastructure for System Trace Module devices 16 * as defined in MIPI STPv2 specification. 17 */ 18 19 #ifndef _UAPI_LINUX_STM_H 20 #define _UAPI_LINUX_STM_H 21 22 #include <linux/types.h> 23 24 /** 25 * struct stp_policy_id - identification for the STP policy 26 * @size: size of the structure including real id[] length 27 * @master: assigned master 28 * @channel: first assigned channel 29 * @width: number of requested channels 30 * @id: identification string 31 * 32 * User must calculate the total size of the structure and put it into 33 * @size field, fill out the @id and desired @width. In return, kernel 34 * fills out @master, @channel and @width. 35 */ 36 struct stp_policy_id { 37 __u32 size; 38 __u16 master; 39 __u16 channel; 40 __u16 width; 41 /* padding */ 42 __u16 __reserved_0; 43 __u32 __reserved_1; 44 char id[0]; 45 }; 46 47 #define STP_POLICY_ID_SET _IOWR('%', 0, struct stp_policy_id) 48 #define STP_POLICY_ID_GET _IOR('%', 1, struct stp_policy_id) 49 #define STP_SET_OPTIONS _IOW('%', 2, __u64) 50 51 #endif /* _UAPI_LINUX_STM_H */ 52
