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      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 (at) 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 */
     78