mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
/*
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* ccw - Channel Command Word library (traditional I/O)
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*
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* Copyright 2017 IBM Corp.
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef LIB_CCW_H
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#define LIB_CCW_H
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#include <stdbool.h>
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#include "lib/zt_common.h"
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/**
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* ccw_devid - CCW device ID
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*/
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struct ccw_devid {
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/** Channel Subsystem ID */
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unsigned int cssid:8;
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/** Subchannel set ID */
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unsigned int ssid:8;
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/** Device number */
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unsigned int devno:16;
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} __packed;
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/**
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* Initialize ccw_devid structure
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*
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* @param[in,out] devid Pointer to ccw_devid structure to be initialized
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* @param[in] cssid Channel Subsystem ID
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* @param[in] ssid Subchannel set ID
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* @param[in] devno Device number
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*/
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static inline void ccw_devid_init(struct ccw_devid *devid,
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unsigned int cssid, unsigned int ssid,
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unsigned int devno)
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{
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devid->cssid = cssid;
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devid->ssid = ssid;
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devid->devno = devno;
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}
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bool ccw_parse_str(struct ccw_devid *devid, const char *id);
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#endif
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