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
  12 struct channel_path_desc {
  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
  23 static inline void chp_id_init(struct chp_id *chpid)
  24 {
  25         memset(chpid, 0, sizeof(struct chp_id));
  26 }
  27
  28 static 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
  33 static 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
  43 static 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 */