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