linux/include/linux/virtio_console.h
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   1#ifndef _LINUX_VIRTIO_CONSOLE_H
   2#define _LINUX_VIRTIO_CONSOLE_H
   3#include <linux/types.h>
   4#include <linux/virtio_ids.h>
   5#include <linux/virtio_config.h>
   6/*
   7 * This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
   8 * anyone can use the definitions to implement compatible drivers/servers:
   9 *
  10 *
  11 * Redistribution and use in source and binary forms, with or without
  12 * modification, are permitted provided that the following conditions
  13 * are met:
  14 * 1. Redistributions of source code must retain the above copyright
  15 *    notice, this list of conditions and the following disclaimer.
  16 * 2. Redistributions in binary form must reproduce the above copyright
  17 *    notice, this list of conditions and the following disclaimer in the
  18 *    documentation and/or other materials provided with the distribution.
  19 * 3. Neither the name of IBM nor the names of its contributors
  20 *    may be used to endorse or promote products derived from this software
  21 *    without specific prior written permission.
  22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
  23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25 * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
  26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32 * SUCH DAMAGE.
  33 *
  34 * Copyright (C) Red Hat, Inc., 2009, 2010, 2011
  35 * Copyright (C) Amit Shah <amit.shah@redhat.com>, 2009, 2010, 2011
  36 */
  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
  42#define VIRTIO_CONSOLE_BAD_ID           (~(u32)0)
  43
  44struct virtio_console_config {
  45        /* colums of the screens */
  46        __u16 cols;
  47        /* rows of the screens */
  48        __u16 rows;
  49        /* max. number of ports this device can hold */
  50        __u32 max_nr_ports;
  51} __attribute__((packed));
  52
  53/*
  54 * A message that's passed between the Host and the Guest for a
  55 * particular port.
  56 */
  57struct virtio_console_control {
  58        __u32 id;               /* Port number */
  59        __u16 event;            /* The kind of control event (see below) */
  60        __u16 value;            /* Extra information for the key */
  61};
  62
  63/* Some events for control messages */
  64#define VIRTIO_CONSOLE_DEVICE_READY     0
  65#define VIRTIO_CONSOLE_PORT_ADD         1
  66#define VIRTIO_CONSOLE_PORT_REMOVE      2
  67#define VIRTIO_CONSOLE_PORT_READY       3
  68#define VIRTIO_CONSOLE_CONSOLE_PORT     4
  69#define VIRTIO_CONSOLE_RESIZE           5
  70#define VIRTIO_CONSOLE_PORT_OPEN        6
  71#define VIRTIO_CONSOLE_PORT_NAME        7
  72
  73#ifdef __KERNEL__
  74int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));
  75#endif /* __KERNEL__ */
  76
  77#endif /* _LINUX_VIRTIO_CONSOLE_H */
  78
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