Try things out.

hw/kdrive/mga/mga.h

+/*
+ * Id: mach64.h,v 1.2 1999/11/02 08:17:24 keithp Exp $
+ *
+ * Copyright © 2003 Anders Carlsson
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Anders Carlsson not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Anders Carlsson makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * ANDERS CARLSSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL ANDERS CARLSSON BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+/* $RCSId: xc/programs/Xserver/hw/kdrive/mach64/mach64.h,v 1.5 2001/06/23 03:41:24 keithp Exp $ */
+
+#ifndef _MGA_H_
+#define _MGA_H_
+#include <vesa.h>
+
+typedef struct _mgaCardInfo {
+    VesaCardPrivRec vesa;
+} MgaCardInfo;
+
+typedef struct _mgaScreenInfo {
+    VesaScreenPrivRec vesa;
+} MgaScreenInfo;