drivers/s390/cio/vfio_ccw_cp.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * channel program interfaces
   4  *
   5  * Copyright IBM Corp. 2017
   6  *
   7  * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
   8  *            Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
   9  */
  10
  11 #ifndef _VFIO_CCW_CP_H_
  12 #define _VFIO_CCW_CP_H_
  13
  14 #include <asm/cio.h>
  15 #include <asm/scsw.h>
  16
  17 #include "orb.h"
  18
  19 /**
  20  * struct channel_program - manage information for channel program
  21  * @ccwchain_list: list head of ccwchains
  22  * @orb: orb for the currently processed ssch request
  23  * @mdev: the mediated device to perform page pinning/unpinning
  24  *
  25  * @ccwchain_list is the head of a ccwchain list, that contents the
  26  * translated result of the guest channel program that pointed out by
  27  * the iova parameter when calling cp_init.
  28  */
  29 struct channel_program {
  30         struct list_head ccwchain_list;
  31         union orb orb;
  32         struct device *mdev;
  33 };
  34
  35 extern int cp_init(struct channel_program *cp, struct device *mdev,
  36                    union orb *orb);
  37 extern void cp_free(struct channel_program *cp);
  38 extern int cp_prefetch(struct channel_program *cp);
  39 extern union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm);
  40 extern void cp_update_scsw(struct channel_program *cp, union scsw *scsw);
  41 extern bool cp_iova_pinned(struct channel_program *cp, u64 iova);
  42
  43 #endif