1 /*- 2 * This header is BSD licensed so anyone can use the definitions to implement 3 * compatible drivers/servers. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of IBM nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * Copyright (C) Red Hat, Inc., 2009, 2010, 2011 29 * Copyright (C) Amit Shah <amit.shah@redhat.com>, 2009, 2010, 2011 30 */ 31 32 #ifndef _VIRTIO_CONSOLE_H 33 #define _VIRTIO_CONSOLE_H 34 35 /* Feature bits */ 36 #define VIRTIO_CONSOLE_F_SIZE 0x01 /* Console size */ 37 #define VIRTIO_CONSOLE_F_MULTIPORT 0x02 /* Multiple ports */ 38 #define VIRTIO_CONSOLE_F_EMERG_WRITE 0x04 /* Emergency write */ 39 40 #define VIRTIO_CONSOLE_BAD_ID (~(uint32_t)0) 41 42 struct virtio_console_config { 43 /* colums of the screens */ 44 uint16_t cols; 45 /* rows of the screens */ 46 uint16_t rows; 47 /* max. number of ports this device can hold */ 48 uint32_t max_nr_ports; 49 /* emergency write register */ 50 uint32_t emerg_wr; 51 } __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 uint32_t id; /* Port number */ 59 uint16_t event; /* The kind of control event (see below) */ 60 uint16_t 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 #endif /* _VIRTIO_CONSOLE_H */ 74