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 _UAPI_LINUX_STM_H
11 #define _UAPI_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[0];
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 /* _UAPI_LINUX_STM_H */