| /* 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 |
