virtio_console.h 3.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778
  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@redhat.com>, 2009, 2010, 2011
  31. */
  32. #ifndef _LINUX_VIRTIO_CONSOLE_H
  33. #define _LINUX_VIRTIO_CONSOLE_H
  34. #include <linux/types.h>
  35. #include <linux/virtio_types.h>
  36. #include <linux/virtio_ids.h>
  37. #include <linux/virtio_config.h>
  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. #define VIRTIO_CONSOLE_BAD_ID (~(__u32)0)
  43. struct virtio_console_config {
  44. /* colums of the screens */
  45. __u16 cols;
  46. /* rows of the screens */
  47. __u16 rows;
  48. /* max. number of ports this device can hold */
  49. __u32 max_nr_ports;
  50. /* emergency write register */
  51. __u32 emerg_wr;
  52. } __attribute__((packed));
  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. __virtio32 id; /* Port number */
  59. __virtio16 event; /* The kind of control event (see below) */
  60. __virtio16 value; /* Extra information for the key */
  61. };
  62. /* Some events for control messages */
  63. #define VIRTIO_CONSOLE_DEVICE_READY 0
  64. #define VIRTIO_CONSOLE_PORT_ADD 1
  65. #define VIRTIO_CONSOLE_PORT_REMOVE 2
  66. #define VIRTIO_CONSOLE_PORT_READY 3
  67. #define VIRTIO_CONSOLE_CONSOLE_PORT 4
  68. #define VIRTIO_CONSOLE_RESIZE 5
  69. #define VIRTIO_CONSOLE_PORT_OPEN 6
  70. #define VIRTIO_CONSOLE_PORT_NAME 7
  71. #endif /* _LINUX_VIRTIO_CONSOLE_H */