| 1 | /* |
| 2 | * ap bridge |
| 3 | * |
| 4 | * Copyright 2018 IBM Corp. |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or (at |
| 7 | * your option) any later version. See the COPYING file in the top-level |
| 8 | * directory. |
| 9 | */ |
| 10 | |
| 11 | #ifndef HW_S390X_AP_BRIDGE_H |
| 12 | #define HW_S390X_AP_BRIDGE_H |
| 13 | |
| 14 | #define TYPE_AP_BRIDGE "ap-bridge" |
| 15 | #define TYPE_AP_BUS "ap-bus" |
| 16 | |
| 17 | void s390_init_ap(void); |
| 18 | |
| 19 | typedef struct ChscSeiNt0Res { |
| 20 | uint16_t length; |
| 21 | uint16_t code; |
| 22 | uint8_t reserved1; |
| 23 | uint16_t reserved2; |
| 24 | uint8_t nt; |
| 25 | #define PENDING_EVENT_INFO_BITMASK 0x80; |
| 26 | uint8_t flags; |
| 27 | uint8_t reserved3; |
| 28 | uint8_t rs; |
| 29 | uint8_t cc; |
| 30 | } QEMU_PACKED ChscSeiNt0Res; |
| 31 | |
| 32 | #define NT0_RES_RESPONSE_CODE 1 |
| 33 | #define NT0_RES_NT_DEFAULT 0 |
| 34 | #define NT0_RES_RS_AP_CHANGE 5 |
| 35 | #define NT0_RES_CC_AP_CHANGE 3 |
| 36 | |
| 37 | #define EVENT_INFORMATION_NOT_STORED 1 |
| 38 | #define EVENT_INFORMATION_STORED 0 |
| 39 | |
| 40 | /** |
| 41 | * ap_chsc_sei_nt0_get_event - Retrieve the next pending AP config |
| 42 | * change event |
| 43 | * @res: Pointer to a ChscSeiNt0Res struct to be filled with event |
| 44 | * data |
| 45 | * |
| 46 | * This function checks for any pending AP config change events and, |
| 47 | * if present, populates the provided response structure with the |
| 48 | * appropriate SEI NT0 fields. |
| 49 | * |
| 50 | * Return: |
| 51 | * EVENT_INFORMATION_STORED - An event was available and written to @res |
| 52 | * EVENT_INFORMATION_NOT_STORED - No event was available |
| 53 | */ |
| 54 | int ap_chsc_sei_nt0_get_event(void *res); |
| 55 | |
| 56 | bool ap_chsc_sei_nt0_have_event(void); |
| 57 | |
| 58 | #endif |