papr-hvpipe.h

 1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2#ifndef _UAPI_PAPR_HVPIPE_H_
 3#define _UAPI_PAPR_HVPIPE_H_
 4
 5#include <linux/types.h>
 6#include <asm/ioctl.h>
 7#include <asm/papr-miscdev.h>
 8
 9/*
10 * This header is included in payload between OS and the user
11 * space.
12 * flags: OS notifies the user space whether the hvpipe is
13 *        closed or the buffer has the payload.
14 */
15struct papr_hvpipe_hdr {
16	__u8 version;
17	__u8 reserved[3];
18	__u32 flags;
19	__u8 reserved2[40];
20};
21
22/*
23 * ioctl for /dev/papr-hvpipe
24 */
25#define PAPR_HVPIPE_IOC_CREATE_HANDLE	_IOW(PAPR_MISCDEV_IOC_ID, 9, __u32)
26
27/*
28 * hvpipe_hdr flags used for read()
29 */
30#define HVPIPE_MSG_AVAILABLE	0x01 /* Payload is available */
31#define HVPIPE_LOST_CONNECTION	0x02 /* Pipe connection is closed/unavailable */
32
33#endif /* _UAPI_PAPR_HVPIPE_H_ */