stm.h (1273B) - Raw
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 * STM class implements generic infrastructure for System Trace Module devices 7 * as defined in MIPI STPv2 specification. 8 */ 9 10 #ifndef _LINUX_STM_H 11 #define _LINUX_STM_H 12 13 #include <linux/types.h> 14 15 /* Maximum allowed master and channel values */ 16 #define STP_MASTER_MAX 0xffff 17 #define STP_CHANNEL_MAX 0xffff 18 19 /** 20 * struct stp_policy_id - identification for the STP policy 21 * @size: size of the structure including real id[] length 22 * @master: assigned master 23 * @channel: first assigned channel 24 * @width: number of requested channels 25 * @id: identification string 26 * 27 * User must calculate the total size of the structure and put it into 28 * @size field, fill out the @id and desired @width. In return, kernel 29 * fills out @master, @channel and @width. 30 */ 31 struct stp_policy_id { 32 __u32 size; 33 __u16 master; 34 __u16 channel; 35 __u16 width; 36 /* padding */ 37 __u16 __reserved_0; 38 __u32 __reserved_1; 39 char id[]; 40 }; 41 42 #define STP_POLICY_ID_SET _IOWR('%', 0, struct stp_policy_id) 43 #define STP_POLICY_ID_GET _IOR('%', 1, struct stp_policy_id) 44 #define STP_SET_OPTIONS _IOW('%', 2, __u64) 45 46 #endif /* _LINUX_STM_H */