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 #include "vfio_ccw_trace.h" 19 20 /* 21 * Max length for ccw chain. 22 * XXX: Limit to 256, need to check more? 23 */ 24 #define CCWCHAIN_LEN_MAX 256 25 26 /** 27 * struct channel_program - manage information for channel program 28 * @ccwchain_list: list head of ccwchains 29 * @orb: orb for the currently processed ssch request 30 * @mdev: the mediated device to perform page pinning/unpinning 31 * @initialized: whether this instance is actually initialized 32 * 33 * @ccwchain_list is the head of a ccwchain list, that contents the 34 * translated result of the guest channel program that pointed out by 35 * the iova parameter when calling cp_init. 36 */ 37 struct channel_program { 38 struct list_head ccwchain_list; 39 union orb orb; 40 struct device *mdev; 41 bool initialized; 42 struct ccw1 *guest_cp; 43 }; 44 45 extern int cp_init(struct channel_program *cp, struct device *mdev, 46 union orb *orb); 47 extern void cp_free(struct channel_program *cp); 48 extern int cp_prefetch(struct channel_program *cp); 49 extern union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm); 50 extern void cp_update_scsw(struct channel_program *cp, union scsw *scsw); 51 extern bool cp_iova_pinned(struct channel_program *cp, u64 iova); 52 53 #endif 54