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Peter Oberparleiter23f62682008-07-14 09:58:52 +02001/*
2 * Functions for incremental construction of fcx enabled I/O control blocks.
3 *
4 * Copyright IBM Corp. 2008
5 * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
6 */
7
8#ifndef _ASM_S390_ITCW_H
David Howells87d2f5e2011-12-13 09:26:45 +00009#define _ASM_S390_ITCW_H
Peter Oberparleiter23f62682008-07-14 09:58:52 +020010
11#include <linux/types.h>
12#include <asm/fcx.h>
13
14#define ITCW_OP_READ 0
15#define ITCW_OP_WRITE 1
16
17struct itcw;
18
19struct tcw *itcw_get_tcw(struct itcw *itcw);
20size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws);
21struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
22 int max_tidaws, int intrg_max_tidaws);
23struct dcw *itcw_add_dcw(struct itcw *itcw, u8 cmd, u8 flags, void *cd,
24 u8 cd_count, u32 count);
25struct tidaw *itcw_add_tidaw(struct itcw *itcw, u8 flags, void *addr,
26 u32 count);
27void itcw_set_data(struct itcw *itcw, void *addr, int use_tidal);
28void itcw_finalize(struct itcw *itcw);
29
30#endif /* _ASM_S390_ITCW_H */