include/uapi/linux/virtio_console.h

   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
  45 struct 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  */
  60 struct 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 */