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4f0c7c6a12
To allow for more flexible testing of the stm class, make it possible to specify the ranges of masters and channels that the dummy_stm devices cover. This is done via module parameters. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* System Trace Module (STM) userspace interfaces
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* Copyright (c) 2014, Intel Corporation.
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*
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* STM class implements generic infrastructure for System Trace Module devices
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* as defined in MIPI STPv2 specification.
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*/
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#ifndef _UAPI_LINUX_STM_H
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#define _UAPI_LINUX_STM_H
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#include <linux/types.h>
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/* Maximum allowed master and channel values */
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#define STP_MASTER_MAX 0xffff
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#define STP_CHANNEL_MAX 0xffff
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/**
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* struct stp_policy_id - identification for the STP policy
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* @size: size of the structure including real id[] length
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* @master: assigned master
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* @channel: first assigned channel
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* @width: number of requested channels
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* @id: identification string
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*
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* User must calculate the total size of the structure and put it into
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* @size field, fill out the @id and desired @width. In return, kernel
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* fills out @master, @channel and @width.
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*/
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struct stp_policy_id {
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__u32 size;
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__u16 master;
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__u16 channel;
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__u16 width;
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/* padding */
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__u16 __reserved_0;
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__u32 __reserved_1;
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char id[0];
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};
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#define STP_POLICY_ID_SET _IOWR('%', 0, struct stp_policy_id)
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#define STP_POLICY_ID_GET _IOR('%', 1, struct stp_policy_id)
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#define STP_SET_OPTIONS _IOW('%', 2, __u64)
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#endif /* _UAPI_LINUX_STM_H */
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