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- /* 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
- * @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;
- bool initialized;
- struct ccw1 *guest_cp;
- };
- int cp_init(struct channel_program *cp, union orb *orb);
- void cp_free(struct channel_program *cp);
- int cp_prefetch(struct channel_program *cp);
- union orb *cp_get_orb(struct channel_program *cp, struct subchannel *sch);
- void cp_update_scsw(struct channel_program *cp, union scsw *scsw);
- bool cp_iova_pinned(struct channel_program *cp, u64 iova, u64 length);
- #endif
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