23f6268947
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>
31 lines
928 B
C
31 lines
928 B
C
/*
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* Functions for incremental construction of fcx enabled I/O control blocks.
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*
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* Copyright IBM Corp. 2008
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* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
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*/
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#ifndef _ASM_S390_ITCW_H
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#define _ASM_S390_ITCW_H _ASM_S390_ITCW_H
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#include <linux/types.h>
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#include <asm/fcx.h>
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#define ITCW_OP_READ 0
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#define ITCW_OP_WRITE 1
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struct itcw;
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struct tcw *itcw_get_tcw(struct itcw *itcw);
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size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws);
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struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
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int max_tidaws, int intrg_max_tidaws);
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struct dcw *itcw_add_dcw(struct itcw *itcw, u8 cmd, u8 flags, void *cd,
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u8 cd_count, u32 count);
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struct tidaw *itcw_add_tidaw(struct itcw *itcw, u8 flags, void *addr,
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u32 count);
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void itcw_set_data(struct itcw *itcw, void *addr, int use_tidal);
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void itcw_finalize(struct itcw *itcw);
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#endif /* _ASM_S390_ITCW_H */
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