linux-headers (unknown)
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 _LINUX_VIRTIO_CONSOLE_H
33 #define _LINUX_VIRTIO_CONSOLE_H
34 #include <linux/types.h>
35 #include <linux/virtio_types.h>
36 #include <linux/virtio_ids.h>
37 #include <linux/virtio_config.h>
38
39 /* Feature bits */
40 #define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */
41 #define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */
42 #define VIRTIO_CONSOLE_F_EMERG_WRITE 2 /* Does host support emergency write? */
43
44 #define VIRTIO_CONSOLE_BAD_ID (~(__u32)0)
45
46 struct virtio_console_config {
47 /* colums of the screens */
48 __virtio16 cols;
49 /* rows of the screens */
50 __virtio16 rows;
51 /* max. number of ports this device can hold */
52 __virtio32 max_nr_ports;
53 /* emergency write register */
54 __virtio32 emerg_wr;
55 } __attribute__((packed));
56
57 /*
58 * A message that's passed between the Host and the Guest for a
59 * particular port.
60 */
61 struct virtio_console_control {
62 __virtio32 id; /* Port number */
63 __virtio16 event; /* The kind of control event (see below) */
64 __virtio16 value; /* Extra information for the key */
65 };
66
67 /* Some events for control messages */
68 #define VIRTIO_CONSOLE_DEVICE_READY 0
69 #define VIRTIO_CONSOLE_PORT_ADD 1
70 #define VIRTIO_CONSOLE_PORT_REMOVE 2
71 #define VIRTIO_CONSOLE_PORT_READY 3
72 #define VIRTIO_CONSOLE_CONSOLE_PORT 4
73 #define VIRTIO_CONSOLE_RESIZE 5
74 #define VIRTIO_CONSOLE_PORT_OPEN 6
75 #define VIRTIO_CONSOLE_PORT_NAME 7
76
77
78 #endif /* _LINUX_VIRTIO_CONSOLE_H */
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