diff options
Diffstat (limited to 'include/asm-s390/chpid.h')
| -rw-r--r-- | include/asm-s390/chpid.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/include/asm-s390/chpid.h b/include/asm-s390/chpid.h new file mode 100644 index 00000000000..b203336fd89 --- /dev/null +++ b/include/asm-s390/chpid.h @@ -0,0 +1,53 @@ +/* + * drivers/s390/cio/chpid.h + * + * Copyright IBM Corp. 2007 + * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> + */ + +#ifndef _ASM_S390_CHPID_H +#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H + +#include <linux/string.h> +#include <asm/types.h> +#include <asm/cio.h> + +#define __MAX_CHPID 255 + +struct chp_id { + u8 reserved1; + u8 cssid; + u8 reserved2; + u8 id; +} __attribute__((packed)); + +static inline void chp_id_init(struct chp_id *chpid) +{ + memset(chpid, 0, sizeof(struct chp_id)); +} + +static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b) +{ + return (a->id == b->id) && (a->cssid == b->cssid); +} + +static inline void chp_id_next(struct chp_id *chpid) +{ + if (chpid->id < __MAX_CHPID) + chpid->id++; + else { + chpid->id = 0; + chpid->cssid++; + } +} + +static inline int chp_id_is_valid(struct chp_id *chpid) +{ + return (chpid->cssid <= __MAX_CSSID); +} + + +#define chp_id_for_each(c) \ + for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c)) + +#endif /* _ASM_S390_CHPID_H */ |