54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
/*
|
||
|
|
* channel program interfaces
|
||
|
|
*
|
||
|
|
* Copyright IBM Corp. 2017
|
||
|
|
*
|
||
|
|
* Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
|
||
|
|
* Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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);
|
||
|
|
|
||
|
|
#endif
|