| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 */ |