include/linux/virtio_console.h

   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
  44 struct 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  */
  57 struct 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__
  74 int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));
  75 #endif /* __KERNEL__ */
  76
  77 #endif /* _LINUX_VIRTIO_CONSOLE_H */