1/*
2 * This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
3 * anyone can use the definitions to implement compatible drivers/servers:
4 *
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of IBM nor the names of its contributors
15 *    may be used to endorse or promote products derived from this software
16 *    without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Copyright (C) Red Hat, Inc., 2009, 2010, 2011
30 * Copyright (C) Amit Shah <amit.shah@redhat.com>, 2009, 2010, 2011
31 */
32#ifndef _UAPI_LINUX_VIRTIO_CONSOLE_H
33#define _UAPI_LINUX_VIRTIO_CONSOLE_H
34#include <linux/types.h>
35#include <linux/virtio_ids.h>
36#include <linux/virtio_config.h>
37
38/* Feature bits */
39#define VIRTIO_CONSOLE_F_SIZE	0	/* Does host provide console size? */
40#define VIRTIO_CONSOLE_F_MULTIPORT 1	/* Does host provide multiple ports? */
41#define VIRTIO_CONSOLE_F_EMERG_WRITE 2 /* Does host support emergency write? */
42
43#define VIRTIO_CONSOLE_BAD_ID		(~(__u32)0)
44
45struct virtio_console_config {
46	/* colums of the screens */
47	__u16 cols;
48	/* rows of the screens */
49	__u16 rows;
50	/* max. number of ports this device can hold */
51	__u32 max_nr_ports;
52	/* emergency write register */
53	__u32 emerg_wr;
54} __attribute__((packed));
55
56/*
57 * A message that's passed between the Host and the Guest for a
58 * particular port.
59 */
60struct virtio_console_control {
61	__u32 id;		/* Port number */
62	__u16 event;		/* The kind of control event (see below) */
63	__u16 value;		/* Extra information for the key */
64};
65
66/* Some events for control messages */
67#define VIRTIO_CONSOLE_DEVICE_READY	0
68#define VIRTIO_CONSOLE_PORT_ADD		1
69#define VIRTIO_CONSOLE_PORT_REMOVE	2
70#define VIRTIO_CONSOLE_PORT_READY	3
71#define VIRTIO_CONSOLE_CONSOLE_PORT	4
72#define VIRTIO_CONSOLE_RESIZE		5
73#define VIRTIO_CONSOLE_PORT_OPEN	6
74#define VIRTIO_CONSOLE_PORT_NAME	7
75
76
77#endif /* _UAPI_LINUX_VIRTIO_CONSOLE_H */
78