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name : chpid.h

 /* SPDX-License-Identifier: GPL-2.0 */
/*
 *    Copyright IBM Corp. 2007, 2012
 *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
 */
#ifndef _ASM_S390_CHPID_H
#define _ASM_S390_CHPID_H

#include <uapi/asm/chpid.h>
#include <asm/cio.h>

struct channel_path_desc_fmt0 {
	u8 flags;
	u8 lsn;
	u8 desc;
	u8 chpid;
	u8 swla;
	u8 zeroes;
	u8 chla;
	u8 chpp;
} __packed;

static inline void chp_id_init(struct chp_id *chpid)
{
	memset(chpid, 0, sizeof(struct chp_id));
}

static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
{
	return (a->id == b->id) && (a->cssid == b->cssid);
}

static inline void chp_id_next(struct chp_id *chpid)
{
	if (chpid->id < __MAX_CHPID)
		chpid->id++;
	else {
		chpid->id = 0;
		chpid->cssid++;
	}
}

static inline int chp_id_is_valid(struct chp_id *chpid)
{
	return (chpid->cssid <= __MAX_CSSID);
}


#define chp_id_for_each(c) \
	for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
#endif /* _ASM_S390_CHPID_H */

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