LXR linux/include/uapi/linux/virtio

   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_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
  46struct 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 */
  61struct 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 /* _UAPI_LINUX_VIRTIO_CONSOLE_H */
  79