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