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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2008-07-14 11:58:52 +0400 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-07-14 12:02:08 +0400 |
| commit | 23f626894765d4c03b72a0d21e44bc46f5ccd12b (patch) | |
| tree | 36c421034683d7f14db6435eefa77d9419c1e593 /include/asm-s390/itcw.h | |
| parent | 83262d6349e60b9d10798d489719d80029c00798 (diff) | |
| download | linux-23f626894765d4c03b72a0d21e44bc46f5ccd12b.tar.xz | |
[S390] cio: provide helper functions for fcx enabled I/O
Provide functions which can be used to incrementally construct fcx
enabled I/O control blocks.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'include/asm-s390/itcw.h')
| -rw-r--r-- | include/asm-s390/itcw.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/asm-s390/itcw.h b/include/asm-s390/itcw.h new file mode 100644 index 000000000000..a9bc5c36b32a --- /dev/null +++ b/include/asm-s390/itcw.h @@ -0,0 +1,30 @@ +/* + * Functions for incremental construction of fcx enabled I/O control blocks. + * + * Copyright IBM Corp. 2008 + * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> + */ + +#ifndef _ASM_S390_ITCW_H +#define _ASM_S390_ITCW_H _ASM_S390_ITCW_H + +#include <linux/types.h> +#include <asm/fcx.h> + +#define ITCW_OP_READ 0 +#define ITCW_OP_WRITE 1 + +struct itcw; + +struct tcw *itcw_get_tcw(struct itcw *itcw); +size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws); +struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg, + int max_tidaws, int intrg_max_tidaws); +struct dcw *itcw_add_dcw(struct itcw *itcw, u8 cmd, u8 flags, void *cd, + u8 cd_count, u32 count); +struct tidaw *itcw_add_tidaw(struct itcw *itcw, u8 flags, void *addr, + u32 count); +void itcw_set_data(struct itcw *itcw, void *addr, int use_tidal); +void itcw_finalize(struct itcw *itcw); + +#endif /* _ASM_S390_ITCW_H */ |