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  * Copyright (C) Red Hat, Inc., 2009, 2010, 2011
  11  * Copyright (C) Amit Shah <amit.shah@redhat.com>, 2009, 2010, 2011
  12  */
  13
  14 /* Feature bits */
  15 #define VIRTIO_CONSOLE_F_SIZE   0       /* Does host provide console size? */
  16 #define VIRTIO_CONSOLE_F_MULTIPORT 1    /* Does host provide multiple ports? */
  17
  18 #define VIRTIO_CONSOLE_BAD_ID           (~(u32)0)
  19
  20 struct virtio_console_config {
  21         /* colums of the screens */
  22         __u16 cols;
  23         /* rows of the screens */
  24         __u16 rows;
  25         /* max. number of ports this device can hold */
  26         __u32 max_nr_ports;
  27 } __attribute__((packed));
  28
  29 /*
  30  * A message that's passed between the Host and the Guest for a
  31  * particular port.
  32  */
  33 struct virtio_console_control {
  34         __u32 id;               /* Port number */
  35         __u16 event;            /* The kind of control event (see below) */
  36         __u16 value;            /* Extra information for the key */
  37 };
  38
  39 /* Some events for control messages */
  40 #define VIRTIO_CONSOLE_DEVICE_READY     0
  41 #define VIRTIO_CONSOLE_PORT_ADD         1
  42 #define VIRTIO_CONSOLE_PORT_REMOVE      2
  43 #define VIRTIO_CONSOLE_PORT_READY       3
  44 #define VIRTIO_CONSOLE_CONSOLE_PORT     4
  45 #define VIRTIO_CONSOLE_RESIZE           5
  46 #define VIRTIO_CONSOLE_PORT_OPEN        6
  47 #define VIRTIO_CONSOLE_PORT_NAME        7
  48
  49 #ifdef __KERNEL__
  50 int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));
  51 #endif /* __KERNEL__ */
  52
  53 #endif /* _LINUX_VIRTIO_CONSOLE_H */