projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| dd873966 | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 74c98e20 CH |
2 | /* |
| 3 | * Interfaces for vfio-ccw | |
| 4 | * | |
| 5 | * Copyright IBM Corp. 2017 | |
| 6 | * | |
| 7 | * Author(s): Dong Jia Shi <[email protected]> | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef _VFIO_CCW_H_ | |
| 11 | #define _VFIO_CCW_H_ | |
| 12 | ||
| 13 | #include <linux/types.h> | |
| 14 | ||
| d9cb4336 | 15 | /* used for START SUBCHANNEL, always present */ |
| 74c98e20 CH |
16 | struct ccw_io_region { |
| 17 | #define ORB_AREA_SIZE 12 | |
| 18 | __u8 orb_area[ORB_AREA_SIZE]; | |
| 19 | #define SCSW_AREA_SIZE 12 | |
| 20 | __u8 scsw_area[SCSW_AREA_SIZE]; | |
| 21 | #define IRB_AREA_SIZE 96 | |
| 22 | __u8 irb_area[IRB_AREA_SIZE]; | |
| 23 | __u32 ret_code; | |
| 24 | } __attribute__((packed)); | |
| 25 | ||
| d9cb4336 CH |
26 | /* |
| 27 | * used for processing commands that trigger asynchronous actions | |
| 28 | * Note: this is controlled by a capability | |
| 29 | */ | |
| 30 | #define VFIO_CCW_ASYNC_CMD_HSCH (1 << 0) | |
| 31 | #define VFIO_CCW_ASYNC_CMD_CSCH (1 << 1) | |
| 32 | struct ccw_cmd_region { | |
| 33 | __u32 command; | |
| 34 | __u32 ret_code; | |
| 35 | } __attribute__((packed)); | |
| 36 | ||
| f76b348e CH |
37 | /* |
| 38 | * Used for processing commands that read the subchannel-information block | |
| 39 | * Reading this region triggers a stsch() to hardware | |
| 40 | * Note: this is controlled by a capability | |
| 41 | */ | |
| 42 | struct ccw_schib_region { | |
| 43 | #define SCHIB_AREA_SIZE 52 | |
| 44 | __u8 schib_area[SCHIB_AREA_SIZE]; | |
| 45 | } __attribute__((packed)); | |
| 46 | ||
| 47 | /* | |
| 48 | * Used for returning a Channel Report Word to userspace. | |
| 49 | * Note: this is controlled by a capability | |
| 50 | */ | |
| 51 | struct ccw_crw_region { | |
| 52 | __u32 crw; | |
| 53 | __u32 pad; | |
| 54 | } __attribute__((packed)); | |
| 55 | ||
| 74c98e20 | 56 | #endif |