51 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * channel program interfaces4 *5 * Copyright IBM Corp. 20176 *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 25625 26/**27 * struct channel_program - manage information for channel program28 * @ccwchain_list: list head of ccwchains29 * @orb: orb for the currently processed ssch request30 * @initialized: whether this instance is actually initialized31 *32 * @ccwchain_list is the head of a ccwchain list, that contents the33 * translated result of the guest channel program that pointed out by34 * the iova parameter when calling cp_init.35 */36struct channel_program {37 struct list_head ccwchain_list;38 union orb orb;39 bool initialized;40 struct ccw1 *guest_cp;41};42 43int cp_init(struct channel_program *cp, union orb *orb);44void cp_free(struct channel_program *cp);45int cp_prefetch(struct channel_program *cp);46union orb *cp_get_orb(struct channel_program *cp, struct subchannel *sch);47void cp_update_scsw(struct channel_program *cp, union scsw *scsw);48bool cp_iova_pinned(struct channel_program *cp, u64 iova, u64 length);49 50#endif51