1 /* 2 * drivers/s390/cio/chpid.h 3 * 4 * Copyright IBM Corp. 2007 5 * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 6 */ 7 8 #ifndef _ASM_S390_CHPID_H 9 #define _ASM_S390_CHPID_H 10 11 #include <linux/string.h> 12 #include <linux/types.h> 13 14 #define __MAX_CHPID 255 15 16 struct chp_id { 17 u8 reserved1; 18 u8 cssid; 19 u8 reserved2; 20 u8 id; 21 } __attribute__((packed)); 22 23 #ifdef __KERNEL__ 24 #include <asm/cio.h> 25 26 static inline void chp_id_init(struct chp_id *chpid) 27 { 28 memset(chpid, 0, sizeof(struct chp_id)); 29 } 30 31 static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b) 32 { 33 return (a->id == b->id) && (a->cssid == b->cssid); 34 } 35 36 static inline void chp_id_next(struct chp_id *chpid) 37 { 38 if (chpid->id < __MAX_CHPID) 39 chpid->id++; 40 else { 41 chpid->id = 0; 42 chpid->cssid++; 43 } 44 } 45 46 static inline int chp_id_is_valid(struct chp_id *chpid) 47 { 48 return (chpid->cssid <= __MAX_CSSID); 49 } 50 51 52 #define chp_id_for_each(c) \ 53 for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c)) 54 #endif /* __KERNEL */ 55 56 #endif /* _ASM_S390_CHPID_H */ 57