1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * channel program interfaces 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright IBM Corp. 2017 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> 8*4882a593Smuzhiyun * Xiao Feng Ren <renxiaof@linux.vnet.ibm.com> 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #ifndef _VFIO_CCW_CP_H_ 12*4882a593Smuzhiyun #define _VFIO_CCW_CP_H_ 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #include <asm/cio.h> 15*4882a593Smuzhiyun #include <asm/scsw.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #include "orb.h" 18*4882a593Smuzhiyun #include "vfio_ccw_trace.h" 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun /* 21*4882a593Smuzhiyun * Max length for ccw chain. 22*4882a593Smuzhiyun * XXX: Limit to 256, need to check more? 23*4882a593Smuzhiyun */ 24*4882a593Smuzhiyun #define CCWCHAIN_LEN_MAX 256 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun /** 27*4882a593Smuzhiyun * struct channel_program - manage information for channel program 28*4882a593Smuzhiyun * @ccwchain_list: list head of ccwchains 29*4882a593Smuzhiyun * @orb: orb for the currently processed ssch request 30*4882a593Smuzhiyun * @mdev: the mediated device to perform page pinning/unpinning 31*4882a593Smuzhiyun * @initialized: whether this instance is actually initialized 32*4882a593Smuzhiyun * 33*4882a593Smuzhiyun * @ccwchain_list is the head of a ccwchain list, that contents the 34*4882a593Smuzhiyun * translated result of the guest channel program that pointed out by 35*4882a593Smuzhiyun * the iova parameter when calling cp_init. 36*4882a593Smuzhiyun */ 37*4882a593Smuzhiyun struct channel_program { 38*4882a593Smuzhiyun struct list_head ccwchain_list; 39*4882a593Smuzhiyun union orb orb; 40*4882a593Smuzhiyun struct device *mdev; 41*4882a593Smuzhiyun bool initialized; 42*4882a593Smuzhiyun struct ccw1 *guest_cp; 43*4882a593Smuzhiyun }; 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun extern int cp_init(struct channel_program *cp, struct device *mdev, 46*4882a593Smuzhiyun union orb *orb); 47*4882a593Smuzhiyun extern void cp_free(struct channel_program *cp); 48*4882a593Smuzhiyun extern int cp_prefetch(struct channel_program *cp); 49*4882a593Smuzhiyun extern union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm); 50*4882a593Smuzhiyun extern void cp_update_scsw(struct channel_program *cp, union scsw *scsw); 51*4882a593Smuzhiyun extern bool cp_iova_pinned(struct channel_program *cp, u64 iova); 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun #endif 54