mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 17:01:57 +07:00
060d2b5afc
To provide user-space a set of interfaces to: 1. pass in a ccw program to perform an I/O operation. 2. read back I/O results of the completed I/O operations. We introduce an MMIO region for the vfio-ccw device here. This region is defined to content: 1. areas to store arguments that an ssch required. 2. areas to store the I/O results. Using pwrite/pread to the device on this region, a user-space program could write/read data to/from the vfio-ccw device. Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com> Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Message-Id: <20170317031743.40128-8-bjsdjshi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
25 lines
426 B
C
25 lines
426 B
C
/*
|
|
* Interfaces for vfio-ccw
|
|
*
|
|
* Copyright IBM Corp. 2017
|
|
*
|
|
* Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#ifndef _VFIO_CCW_H_
|
|
#define _VFIO_CCW_H_
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct ccw_io_region {
|
|
#define ORB_AREA_SIZE 12
|
|
__u8 orb_area[ORB_AREA_SIZE];
|
|
#define SCSW_AREA_SIZE 12
|
|
__u8 scsw_area[SCSW_AREA_SIZE];
|
|
#define IRB_AREA_SIZE 96
|
|
__u8 irb_area[IRB_AREA_SIZE];
|
|
__u32 ret_code;
|
|
} __packed;
|
|
|
|
#endif
|