1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Interfaces for vfio-ccw 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright IBM Corp. 2017 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef _VFIO_CCW_H_ 11*4882a593Smuzhiyun #define _VFIO_CCW_H_ 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <linux/types.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* used for START SUBCHANNEL, always present */ 16*4882a593Smuzhiyun struct ccw_io_region { 17*4882a593Smuzhiyun #define ORB_AREA_SIZE 12 18*4882a593Smuzhiyun __u8 orb_area[ORB_AREA_SIZE]; 19*4882a593Smuzhiyun #define SCSW_AREA_SIZE 12 20*4882a593Smuzhiyun __u8 scsw_area[SCSW_AREA_SIZE]; 21*4882a593Smuzhiyun #define IRB_AREA_SIZE 96 22*4882a593Smuzhiyun __u8 irb_area[IRB_AREA_SIZE]; 23*4882a593Smuzhiyun __u32 ret_code; 24*4882a593Smuzhiyun } __packed; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun /* 27*4882a593Smuzhiyun * used for processing commands that trigger asynchronous actions 28*4882a593Smuzhiyun * Note: this is controlled by a capability 29*4882a593Smuzhiyun */ 30*4882a593Smuzhiyun #define VFIO_CCW_ASYNC_CMD_HSCH (1 << 0) 31*4882a593Smuzhiyun #define VFIO_CCW_ASYNC_CMD_CSCH (1 << 1) 32*4882a593Smuzhiyun struct ccw_cmd_region { 33*4882a593Smuzhiyun __u32 command; 34*4882a593Smuzhiyun __u32 ret_code; 35*4882a593Smuzhiyun } __packed; 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun /* 38*4882a593Smuzhiyun * Used for processing commands that read the subchannel-information block 39*4882a593Smuzhiyun * Reading this region triggers a stsch() to hardware 40*4882a593Smuzhiyun * Note: this is controlled by a capability 41*4882a593Smuzhiyun */ 42*4882a593Smuzhiyun struct ccw_schib_region { 43*4882a593Smuzhiyun #define SCHIB_AREA_SIZE 52 44*4882a593Smuzhiyun __u8 schib_area[SCHIB_AREA_SIZE]; 45*4882a593Smuzhiyun } __packed; 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun /* 48*4882a593Smuzhiyun * Used for returning a Channel Report Word to userspace. 49*4882a593Smuzhiyun * Note: this is controlled by a capability 50*4882a593Smuzhiyun */ 51*4882a593Smuzhiyun struct ccw_crw_region { 52*4882a593Smuzhiyun __u32 crw; 53*4882a593Smuzhiyun __u32 pad; 54*4882a593Smuzhiyun } __packed; 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun #endif 57