xref: /linux/arch/s390/include/asm/chpid.h (revision b889fcf63cb62e7fdb7816565e28f44dbe4a76a5)
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 
11 static inline void chp_id_init(struct chp_id *chpid)
12 {
13 	memset(chpid, 0, sizeof(struct chp_id));
14 }
15 
16 static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
17 {
18 	return (a->id == b->id) && (a->cssid == b->cssid);
19 }
20 
21 static inline void chp_id_next(struct chp_id *chpid)
22 {
23 	if (chpid->id < __MAX_CHPID)
24 		chpid->id++;
25 	else {
26 		chpid->id = 0;
27 		chpid->cssid++;
28 	}
29 }
30 
31 static inline int chp_id_is_valid(struct chp_id *chpid)
32 {
33 	return (chpid->cssid <= __MAX_CSSID);
34 }
35 
36 
37 #define chp_id_for_each(c) \
38 	for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
39 #endif /* _ASM_S390_CHPID_H */
40