1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *  Functions for incremental construction of fcx enabled I/O control blocks.
4  *
5  *    Copyright IBM Corp. 2008
6  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
7  */
8 
9 #ifndef _ASM_S390_ITCW_H
10 #define _ASM_S390_ITCW_H
11 
12 #include <linux/types.h>
13 #include <asm/fcx.h>
14 
15 #define ITCW_OP_READ	0
16 #define ITCW_OP_WRITE	1
17 
18 struct itcw;
19 
20 struct tcw *itcw_get_tcw(struct itcw *itcw);
21 size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws);
22 struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
23 		       int max_tidaws, int intrg_max_tidaws);
24 struct dcw *itcw_add_dcw(struct itcw *itcw, u8 cmd, u8 flags, void *cd,
25 			 u8 cd_count, u32 count);
26 struct tidaw *itcw_add_tidaw(struct itcw *itcw, u8 flags, void *addr,
27 			     u32 count);
28 void itcw_set_data(struct itcw *itcw, void *addr, int use_tidal);
29 void itcw_finalize(struct itcw *itcw);
30 
31 #endif /* _ASM_S390_ITCW_H */
32