| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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| 2 | /* |
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| 3 | * System Trace Module (STM) userspace interfaces |
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| 4 | * Copyright (c) 2014, Intel Corporation. |
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| 5 | * |
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| 6 | * STM class implements generic infrastructure for System Trace Module devices |
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| 7 | * as defined in MIPI STPv2 specification. |
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| 8 | */ |
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| 9 | |
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| 10 | #ifndef _UAPI_LINUX_STM_H |
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| 11 | #define _UAPI_LINUX_STM_H |
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| 12 | |
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| 13 | #include <linux/types.h> |
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| 14 | |
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| 15 | /* Maximum allowed master and channel values */ |
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| 16 | #define STP_MASTER_MAX 0xffff |
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| 17 | #define STP_CHANNEL_MAX 0xffff |
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| 18 | |
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| 19 | /** |
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| 20 | * struct stp_policy_id - identification for the STP policy |
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| 21 | * @size: size of the structure including real id[] length |
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| 22 | * @master: assigned master |
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| 23 | * @channel: first assigned channel |
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| 24 | * @width: number of requested channels |
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| 25 | * @id: identification string |
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| 26 | * |
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| 27 | * User must calculate the total size of the structure and put it into |
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| 28 | * @size field, fill out the @id and desired @width. In return, kernel |
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| 29 | * fills out @master, @channel and @width. |
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| 30 | */ |
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| 31 | struct stp_policy_id { |
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| 32 | __u32 size; |
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| 33 | __u16 master; |
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| 34 | __u16 channel; |
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| 35 | __u16 width; |
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| 36 | /* padding */ |
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| 37 | __u16 __reserved_0; |
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| 38 | __u32 __reserved_1; |
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| 39 | char id[]; |
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| 40 | }; |
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| 41 | |
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| 42 | #define STP_POLICY_ID_SET _IOWR('%', 0, struct stp_policy_id) |
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| 43 | #define STP_POLICY_ID_GET _IOR('%', 1, struct stp_policy_id) |
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| 44 | #define STP_SET_OPTIONS _IOW('%', 2, __u64) |
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| 45 | |
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| 46 | #endif /* _UAPI_LINUX_STM_H */ |
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| 47 | |
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