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Diffstat (limited to 'arch/s390/include/asm/chpid.h')
| -rw-r--r-- | arch/s390/include/asm/chpid.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/s390/include/asm/chpid.h b/arch/s390/include/asm/chpid.h new file mode 100644 index 0000000000..20e0d22f29 --- /dev/null +++ b/arch/s390/include/asm/chpid.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp. 2007, 2012 + * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> + */ +#ifndef _ASM_S390_CHPID_H +#define _ASM_S390_CHPID_H + +#include <uapi/asm/chpid.h> +#include <asm/cio.h> + +struct channel_path_desc_fmt0 { + u8 flags; + u8 lsn; + u8 desc; + u8 chpid; + u8 swla; + u8 zeroes; + u8 chla; + u8 chpp; +} __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 */ |