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| author |   Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> | 2017-03-17 04:17:34 +0100 |
|---|---|---|
| committer |   Cornelia Huck <cornelia.huck@de.ibm.com> | 2017-03-31 12:55:06 +0200 |
| commit | 060d2b5afcc4f9e2d61e2b059e648f569b8dba9a (patch) | |
| tree | c33cfb0c149782f539391e3cbcc4cd021eb6886b /include/uapi/linux/vfio_ccw.h | |
| parent | vfio: ccw: register vfio_ccw to the mediated device framework (diff) | |
| download | wireguard-linux-060d2b5afcc4f9e2d61e2b059e648f569b8dba9a.tar.xz wireguard-linux-060d2b5afcc4f9e2d61e2b059e648f569b8dba9a.zip | |
vfio: ccw: introduce ccw_io_region
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>
Diffstat (limited to 'include/uapi/linux/vfio_ccw.h')
| -rw-r--r-- | include/uapi/linux/vfio_ccw.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio_ccw.h b/include/uapi/linux/vfio_ccw.h new file mode 100644 index 000000000000..34a7f6f9e065 --- /dev/null +++ b/include/uapi/linux/vfio_ccw.h @@ -0,0 +1,24 @@ +/* + * 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 |