1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2c6557e7fSMartin Schwidefsky /* 3c6557e7fSMartin Schwidefsky * Functions for incremental construction of fcx enabled I/O control blocks. 4c6557e7fSMartin Schwidefsky * 5c6557e7fSMartin Schwidefsky * Copyright IBM Corp. 2008 6c6557e7fSMartin Schwidefsky * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 7c6557e7fSMartin Schwidefsky */ 8c6557e7fSMartin Schwidefsky 9c6557e7fSMartin Schwidefsky #ifndef _ASM_S390_ITCW_H 1087d2f5e3SDavid Howells #define _ASM_S390_ITCW_H 11c6557e7fSMartin Schwidefsky 12c6557e7fSMartin Schwidefsky #include <linux/types.h> 13c6557e7fSMartin Schwidefsky #include <asm/fcx.h> 14c6557e7fSMartin Schwidefsky 15c6557e7fSMartin Schwidefsky #define ITCW_OP_READ 0 16c6557e7fSMartin Schwidefsky #define ITCW_OP_WRITE 1 17c6557e7fSMartin Schwidefsky 18c6557e7fSMartin Schwidefsky struct itcw; 19c6557e7fSMartin Schwidefsky 20c6557e7fSMartin Schwidefsky struct tcw *itcw_get_tcw(struct itcw *itcw); 21c6557e7fSMartin Schwidefsky size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws); 22c6557e7fSMartin Schwidefsky struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg, 23c6557e7fSMartin Schwidefsky int max_tidaws, int intrg_max_tidaws); 24c6557e7fSMartin Schwidefsky struct dcw *itcw_add_dcw(struct itcw *itcw, u8 cmd, u8 flags, void *cd, 25c6557e7fSMartin Schwidefsky u8 cd_count, u32 count); 26c6557e7fSMartin Schwidefsky struct tidaw *itcw_add_tidaw(struct itcw *itcw, u8 flags, void *addr, 27c6557e7fSMartin Schwidefsky u32 count); 28c6557e7fSMartin Schwidefsky void itcw_set_data(struct itcw *itcw, void *addr, int use_tidal); 29c6557e7fSMartin Schwidefsky void itcw_finalize(struct itcw *itcw); 30c6557e7fSMartin Schwidefsky 31c6557e7fSMartin Schwidefsky #endif /* _ASM_S390_ITCW_H */ 32