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
44