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
