drivers/s390/cio/vfio_ccw_cp.h

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