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