LXR linux/arch/s390/include/asm/chpid.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 *    Copyright IBM Corp. 2007, 2012
   4 *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
   5 */
   6#ifndef _ASM_S390_CHPID_H
   7#define _ASM_S390_CHPID_H
   8
   9#include <uapi/asm/chpid.h>
  10#include <asm/cio.h>
  11
  12struct channel_path_desc_fmt0 {
  13        u8 flags;
  14        u8 lsn;
  15        u8 desc;
  16        u8 chpid;
  17        u8 swla;
  18        u8 zeroes;
  19        u8 chla;
  20        u8 chpp;
  21} __packed;
  22
  23static inline void chp_id_init(struct chp_id *chpid)
  24{
  25        memset(chpid, 0, sizeof(struct chp_id));
  26}
  27
  28static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
  29{
  30        return (a->id == b->id) && (a->cssid == b->cssid);
  31}
  32
  33static inline void chp_id_next(struct chp_id *chpid)
  34{
  35        if (chpid->id < __MAX_CHPID)
  36                chpid->id++;
  37        else {
  38                chpid->id = 0;
  39                chpid->cssid++;
  40        }
  41}
  42
  43static inline int chp_id_is_valid(struct chp_id *chpid)
  44{
  45        return (chpid->cssid <= __MAX_CSSID);
  46}
  47
  48
  49#define chp_id_for_each(c) \
  50        for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
  51#endif /* _ASM_S390_CHPID_H */
  52