arch/s390/include/asm/itcw.h

   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 */