| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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| 2 | /* |
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| 3 | * Interfaces for vfio-ccw |
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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 | */ |
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| 9 | |
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| 10 | #ifndef _VFIO_CCW_H_ |
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| 11 | #define _VFIO_CCW_H_ |
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| 12 | |
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| 13 | #include <linux/types.h> |
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| 14 | |
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| 15 | /* used for START SUBCHANNEL, always present */ |
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| 16 | struct ccw_io_region { |
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| 17 | #define ORB_AREA_SIZE 12 |
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| 18 | __u8 orb_area[ORB_AREA_SIZE]; |
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| 19 | #define SCSW_AREA_SIZE 12 |
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| 20 | __u8 scsw_area[SCSW_AREA_SIZE]; |
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| 21 | #define IRB_AREA_SIZE 96 |
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| 22 | __u8 irb_area[IRB_AREA_SIZE]; |
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| 23 | __u32 ret_code; |
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| 24 | } __packed; |
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| 25 | |
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| 26 | /* |
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| 27 | * used for processing commands that trigger asynchronous actions |
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| 28 | * Note: this is controlled by a capability |
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| 29 | */ |
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| 30 | #define VFIO_CCW_ASYNC_CMD_HSCH (1 << 0) |
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| 31 | #define VFIO_CCW_ASYNC_CMD_CSCH (1 << 1) |
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| 32 | struct ccw_cmd_region { |
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| 33 | __u32 command; |
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| 34 | __u32 ret_code; |
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| 35 | } __packed; |
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| 36 | |
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| 37 | /* |
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| 38 | * Used for processing commands that read the subchannel-information block |
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| 39 | * Reading this region triggers a stsch() to hardware |
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| 40 | * Note: this is controlled by a capability |
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| 41 | */ |
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| 42 | struct ccw_schib_region { |
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| 43 | #define SCHIB_AREA_SIZE 52 |
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| 44 | __u8 schib_area[SCHIB_AREA_SIZE]; |
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| 45 | } __packed; |
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| 46 | |
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| 47 | /* |
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| 48 | * Used for returning a Channel Report Word to userspace. |
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| 49 | * Note: this is controlled by a capability |
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| 50 | */ |
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| 51 | struct ccw_crw_region { |
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| 52 | __u32 crw; |
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| 53 | __u32 pad; |
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| 54 | } __packed; |
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| 55 | |
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| 56 | #endif |
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| 57 | |
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