xref: /openbmc/linux/arch/s390/include/asm/chpid.h (revision ded27d8d)
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 
chp_id_init(struct chp_id * chpid)23 static inline void chp_id_init(struct chp_id *chpid)
24 {
25 	memset(chpid, 0, sizeof(struct chp_id));
26 }
27 
chp_id_is_equal(struct chp_id * a,struct chp_id * b)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 
chp_id_next(struct chp_id * chpid)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 
chp_id_is_valid(struct chp_id * chpid)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