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