blob: ba31240ce96594ef9e21c3fd1d5c731b791b6898 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
* channel program interfaces
* Copyright IBM Corp. 2017
* Author(s): Dong Jia Shi <>
* Xiao Feng Ren <>
#ifndef _VFIO_CCW_CP_H_
#define _VFIO_CCW_CP_H_
#include <asm/cio.h>
#include <asm/scsw.h>
#include "orb.h"
#include "vfio_ccw_trace.h"
* Max length for ccw chain.
* XXX: Limit to 256, need to check more?
#define CCWCHAIN_LEN_MAX 256
* struct channel_program - manage information for channel program
* @ccwchain_list: list head of ccwchains
* @orb: orb for the currently processed ssch request
* @mdev: the mediated device to perform page pinning/unpinning
* @initialized: whether this instance is actually initialized
* @ccwchain_list is the head of a ccwchain list, that contents the
* translated result of the guest channel program that pointed out by
* the iova parameter when calling cp_init.
struct channel_program {
struct list_head ccwchain_list;
union orb orb;
struct device *mdev;
bool initialized;
struct ccw1 *guest_cp;
extern int cp_init(struct channel_program *cp, struct device *mdev,
union orb *orb);
extern void cp_free(struct channel_program *cp);
extern int cp_prefetch(struct channel_program *cp);
extern union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm);
extern void cp_update_scsw(struct channel_program *cp, union scsw *scsw);
extern bool cp_iova_pinned(struct channel_program *cp, u64 iova);