OvmfPkg: add IndustryStandard/VirtioSerial.h

Add header files with structs and defines for the virtio serial device.

The virtio serial device also known as virtio console device because
initially it had only support for a single tty, intended to be used as
console.  Support for multiple streams and named data ports has been
added later on.

https://docs.oasis-open.org/virtio/virtio/v1.2/cs01/virtio-v1.2-cs01.html#x1-2900003

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

OvmfPkg/Include/IndustryStandard/VirtioSerial.h

@@ -0,0 +1,64 @@
+/** @file
+  Virtio Serial Device specific type and macro definitions.
+
+  Copyright (C) 2013-2016, Red Hat, Inc.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _VIRTIO_SERIAL_H_
+#define _VIRTIO_SERIAL_H_
+
+#include <IndustryStandard/Virtio095.h>
+#include <IndustryStandard/Virtio10.h>
+
+//
+// Device Configuration
+//
+typedef struct {
+  UINT16    Cols;
+  UINT16    Rows;
+  UINT32    MaxPorts;
+  UINT32    EmergWrite;
+} VIRTIO_SERIAL_CONFIG;
+
+//
+// Control Queue
+//
+typedef struct {
+  UINT32    Id;
+  UINT16    Event;
+  UINT16    Value;
+} VIRTIO_SERIAL_CONTROL;
+
+//
+// Queue Identifiers
+//
+#define VIRTIO_SERIAL_Q_RX_PORT0  0
+#define VIRTIO_SERIAL_Q_TX_PORT0  1
+#define VIRTIO_SERIAL_Q_RX_CTRL   2
+#define VIRTIO_SERIAL_Q_TX_CTRL   3
+#define VIRTIO_SERIAL_Q_RX_BASE   4
+#define VIRTIO_SERIAL_Q_TX_BASE   5
+
+//
+// Feature Bits
+//
+#define VIRTIO_SERIAL_F_SIZE         BIT0
+#define VIRTIO_SERIAL_F_MULTIPORT    BIT1
+#define VIRTIO_SERIAL_F_EMERG_WRITE  BIT2
+
+//
+// Events
+//
+#define VIRTIO_SERIAL_DEVICE_READY   0
+#define VIRTIO_SERIAL_DEVICE_ADD     1
+#define VIRTIO_SERIAL_DEVICE_REMOVE  2
+#define VIRTIO_SERIAL_PORT_READY     3
+#define VIRTIO_SERIAL_CONSOLE_PORT   4
+#define VIRTIO_SERIAL_RESIZE         5
+#define VIRTIO_SERIAL_PORT_OPEN      6
+#define VIRTIO_SERIAL_PORT_NAME      7
+
+#endif /* _VIRTIO_SERIAL_H_ */