OvmfPkg: VMWare SVGA display device register definitions

This adds a header file defining symbolic constants for the VMWare SVGA
virtual display device in preparation for supporting it in
QemuVideoDxe.

It is mostly an extract of the file lib/vmware/svga_reg.h from commit
329dd537456f93a806841ec8a8213aed11395def of VMWare's vmware-svga
repository at git://git.code.sf.net/p/vmware-svga/git (See also
http://vmware-svga.sourceforge.net/ )

Only the bare essentials necessary for initialisation, modesetting and
framebuffer access have been kept from the original file; macro names
have been prefixed with VMWARE_SVGA_ instead of SVGA2_, and the enum
definition has been adapted to comply with EDK2 naming conventions.

The original file was released by VMWare under the MIT license, this
has been retained.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

OvmfPkg/Include/IndustryStandard/VmwareSvga.h

@@ -0,0 +1,104 @@
+/** @file
+
+  Macro and enum definitions of a subset of port numbers, register identifiers
+  and values required for driving the VMWare SVGA virtual display adapter,
+  also implemented by Qemu.
+
+  This file's contents was extracted from file lib/vmware/svga_reg.h in commit
+  329dd537456f93a806841ec8a8213aed11395def of VMWare's vmware-svga repository:
+  git://git.code.sf.net/p/vmware-svga/git
+
+
+  Copyright 1998-2009 VMware, Inc.  All rights reserved.
+  Portions Copyright 2017 Phil Dennis-Jordan <phil@philjordan.eu>
+
+  Permission is hereby granted, free of charge, to any person
+  obtaining a copy of this software and associated documentation
+  files (the "Software"), to deal in the Software without
+  restriction, including without limitation the rights to use, copy,
+  modify, merge, publish, distribute, sublicense, and/or sell copies
+  of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+
+**/
+
+#ifndef _VMWARE_SVGA_H_
+#define _VMWARE_SVGA_H_
+
+#include <Base.h>
+
+//
+// IDs for recognising the device
+//
+#define VMWARE_PCI_VENDOR_ID_VMWARE            0x15AD
+#define VMWARE_PCI_DEVICE_ID_VMWARE_SVGA2      0x0405
+
+//
+// I/O port BAR offsets for register selection and read/write.
+//
+// The register index is written to the 32-bit index port, followed by a 32-bit
+// read or write on the value port to read or set that register's contents.
+//
+#define VMWARE_SVGA_INDEX_PORT         0x0
+#define VMWARE_SVGA_VALUE_PORT         0x1
+
+//
+// Some of the device's register indices for basic framebuffer functionality.
+//
+typedef enum {
+  VmwareSvgaRegId = 0,
+  VmwareSvgaRegEnable = 1,
+  VmwareSvgaRegWidth = 2,
+  VmwareSvgaRegHeight = 3,
+  VmwareSvgaRegMaxWidth = 4,
+  VmwareSvgaRegMaxHeight = 5,
+
+  VmwareSvgaRegBitsPerPixel = 7,
+
+  VmwareSvgaRegRedMask = 9,
+  VmwareSvgaRegGreenMask = 10,
+  VmwareSvgaRegBlueMask = 11,
+  VmwareSvgaRegBytesPerLine = 12,
+
+  VmwareSvgaRegFbOffset = 14,
+
+  VmwareSvgaRegFbSize = 16,
+  VmwareSvgaRegCapabilities = 17,
+
+  VmwareSvgaRegHostBitsPerPixel = 28,
+} VMWARE_SVGA_REGISTER;
+
+//
+// Values used with VmwareSvgaRegId for sanity-checking the device and getting
+// its version.
+//
+#define VMWARE_SVGA_MAGIC          0x900000U
+#define VMWARE_SVGA_MAKE_ID(ver)   (VMWARE_SVGA_MAGIC << 8 | (ver))
+
+#define VMWARE_SVGA_VERSION_2      2
+#define VMWARE_SVGA_ID_2           VMWARE_SVGA_MAKE_ID (VMWARE_SVGA_VERSION_2)
+
+#define VMWARE_SVGA_VERSION_1      1
+#define VMWARE_SVGA_ID_1           VMWARE_SVGA_MAKE_ID (VMWARE_SVGA_VERSION_1)
+
+#define VMWARE_SVGA_VERSION_0      0
+#define VMWARE_SVGA_ID_0           VMWARE_SVGA_MAKE_ID (VMWARE_SVGA_VERSION_0)
+
+//
+// One of the capability bits advertised by VmwareSvgaRegCapabilities.
+//
+#define VMWARE_SVGA_CAP_8BIT_EMULATION     BIT8
+
+#endif