vfio_ccw.h (1317B)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * Interfaces for vfio-ccw 4 * 5 * Copyright IBM Corp. 2017 6 * 7 * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> 8 */ 9 10 #ifndef _VFIO_CCW_H_ 11 #define _VFIO_CCW_H_ 12 13 #include <linux/types.h> 14 15 /* used for START SUBCHANNEL, always present */ 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 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 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 56 #endif