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/*
* ccw - Channel Command Word library (traditional I/O)
*
* Copyright 2017 IBM Corp.
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef LIB_CCW_H
#define LIB_CCW_H
#include <stdbool.h>
#include "lib/zt_common.h"
/**
* ccw_devid - CCW device ID
*/
struct ccw_devid {
/** Channel Subsystem ID */
unsigned int cssid:8;
/** Subchannel set ID */
unsigned int ssid:8;
/** Device number */
unsigned int devno:16;
} __packed;
/**
* Initialize ccw_devid structure
*
* @param[in,out] devid Pointer to ccw_devid structure to be initialized
* @param[in] cssid Channel Subsystem ID
* @param[in] ssid Subchannel set ID
* @param[in] devno Device number
*/
static inline void ccw_devid_init(struct ccw_devid *devid,
unsigned int cssid, unsigned int ssid,
unsigned int devno)
{
devid->cssid = cssid;
devid->ssid = ssid;
devid->devno = devno;
}
bool ccw_parse_str(struct ccw_devid *devid, const char *id);
#endif
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