From 23f626894765d4c03b72a0d21e44bc46f5ccd12b Mon Sep 17 00:00:00 2001 From: Peter Oberparleiter Date: Mon, 14 Jul 2008 09:58:52 +0200 Subject: [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 Signed-off-by: Martin Schwidefsky Signed-off-by: Heiko Carstens --- include/asm-s390/itcw.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 include/asm-s390/itcw.h (limited to 'include/asm-s390') diff --git a/include/asm-s390/itcw.h b/include/asm-s390/itcw.h new file mode 100644 index 00000000000..a9bc5c36b32 --- /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 + */ + +#ifndef _ASM_S390_ITCW_H +#define _ASM_S390_ITCW_H _ASM_S390_ITCW_H + +#include +#include + +#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 */ -- cgit v1.2.3-70-g09d2