Current File : //usr/include/linux/virtio_console.h
/*
* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
* anyone can use the definitions to implement compatible drivers/servers:
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of IBM nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copyright (C) Red Hat, Inc., 2009, 2010, 2011
* Copyright (C) Amit Shah <amit.shah@redhat.com>, 2009, 2010, 2011
*/
#ifndef _LINUX_VIRTIO_CONSOLE_H
#define _LINUX_VIRTIO_CONSOLE_H
#include <linux/types.h>
#include <linux/virtio_types.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
/* Feature bits */
#define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */
#define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */
#define VIRTIO_CONSOLE_F_EMERG_WRITE 2 /* Does host support emergency write? */
#define VIRTIO_CONSOLE_BAD_ID (~(__u32)0)
struct virtio_console_config {
/* colums of the screens */
__u16 cols;
/* rows of the screens */
__u16 rows;
/* max. number of ports this device can hold */
__u32 max_nr_ports;
/* emergency write register */
__u32 emerg_wr;
} __attribute__((packed));
/*
* A message that's passed between the Host and the Guest for a
* particular port.
*/
struct virtio_console_control {
__virtio32 id; /* Port number */
__virtio16 event; /* The kind of control event (see below) */
__virtio16 value; /* Extra information for the key */
};
/* Some events for control messages */
#define VIRTIO_CONSOLE_DEVICE_READY 0
#define VIRTIO_CONSOLE_PORT_ADD 1
#define VIRTIO_CONSOLE_PORT_REMOVE 2
#define VIRTIO_CONSOLE_PORT_READY 3
#define VIRTIO_CONSOLE_CONSOLE_PORT 4
#define VIRTIO_CONSOLE_RESIZE 5
#define VIRTIO_CONSOLE_PORT_OPEN 6
#define VIRTIO_CONSOLE_PORT_NAME 7
#endif /* _LINUX_VIRTIO_CONSOLE_H */
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