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_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
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 */
52
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