| Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 1 | /* |
| Sebastian Ott | 4dcc2a4 | 2012-10-05 10:43:31 +0200 | [diff] [blame] | 2 | * Copyright IBM Corp. 2007, 2012 |
| Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 3 | * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> |
| 4 | */ |
| Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 5 | #ifndef _ASM_S390_CHPID_H |
| David Howells | 87d2f5e | 2011-12-13 09:26:45 +0000 | [diff] [blame] | 6 | #define _ASM_S390_CHPID_H |
| Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 7 | |
| David Howells | 9807f75 | 2012-10-09 09:47:31 +0100 | [diff] [blame] | 8 | #include <uapi/asm/chpid.h> |
| Adrian Bunk | 626f311 | 2008-07-17 17:16:42 +0200 | [diff] [blame] | 9 | #include <asm/cio.h> |
| 10 | |
| Sebastian Ott | 2bf29df | 2014-05-07 13:27:21 +0200 | [diff] [blame] | 11 | struct 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 | |
| Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 22 | static inline void chp_id_init(struct chp_id *chpid) |
| 23 | { |
| 24 | memset(chpid, 0, sizeof(struct chp_id)); |
| 25 | } |
| 26 | |
| 27 | static 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 | |
| 32 | static 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 | |
| 42 | static 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)) |
| Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 50 | #endif /* _ASM_S390_CHPID_H */ |