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diff --git a/xorg-server/mi/mibank.h b/xorg-server/mi/mibank.h
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+/*
+ * Copyright 1997 through 2004 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
+ *
+ * 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 Marc Aurele La France not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  Marc Aurele La France makes no representations
+ * about the suitability of this software for any purpose.  It is provided
+ * "as-is" without express or implied warranty.
+ *
+ * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO
+ * EVENT SHALL MARC AURELE LA FRANCE 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.
+ */
+
+
+#ifndef __MIBANK_H__
+#define __MIBANK_H__ 1
+
+#include "scrnintstr.h"
+
+/*
+ * Banking external interface.
+ */
+
+/*
+ * This is the banking function type.  The return value is normally zero.
+ * Non-zero returns can be used to implement the likes of scanline interleave,
+ * etc.
+ */
+typedef int miBankProc(
+    ScreenPtr /*pScreen*/,
+    unsigned int /*iBank*/
+);
+
+typedef miBankProc *miBankProcPtr;
+
+typedef struct _miBankInfo
+{
+    /*
+     * Banking refers to the use of one or more apertures (in the server's
+     * address space) to access various parts of a potentially larger hardware
+     * frame buffer.
+     *
+     * Three different banking schemes are supported:
+     *
+     * Single banking is indicated when pBankA and pBankB are equal and all
+     * three miBankProcPtr's point to the same function.  Here, both reads and
+     * writes through the aperture access the same hardware location.
+     *
+     * Shared banking is indicated when pBankA and pBankB are equal but the
+     * source and destination functions differ.  Here reads through the
+     * aperture do not necessarily access the same hardware location as writes.
+     *
+     * Double banking is indicated when pBankA and pBankB differ.  Here two
+     * independent apertures are used to provide read/write access to
+     * potentially different hardware locations.
+     *
+     * Any other combination will result in no banking.
+     */
+    miBankProcPtr SetSourceBank;                /* Set pBankA bank number */
+    miBankProcPtr SetDestinationBank;           /* Set pBankB bank number */
+    miBankProcPtr SetSourceAndDestinationBanks; /* Set both bank numbers */
+
+    pointer pBankA;     /* First aperture location */
+    pointer pBankB;     /* First or second aperture location */
+
+    /*
+     * BankSize is in units of sizeof(char) and is the size of each bank.
+     */
+    unsigned long BankSize;
+
+    /*
+     * nBankDepth is the colour depth associated with the maximum number of a
+     * pixel's bits that are simultaneously accessible through the frame buffer
+     * aperture.
+     */
+    unsigned int nBankDepth;
+} miBankInfoRec, *miBankInfoPtr;
+
+Bool
+miInitializeBanking(
+    ScreenPtr /*pScreen*/,
+    unsigned int /*xsize*/,
+    unsigned int /*ysize*/,
+    unsigned int /*width*/,
+    miBankInfoPtr /*pBankInfo*/
+);
+
+Bool
+miModifyBanking(
+    ScreenPtr /*pScreen*/,
+    miBankInfoPtr /*pBankInfo*/
+);
+
+/*
+ * This function determines the minimum screen width, given a initial estimate
+ * and various screen attributes.  DDX needs to determine this width before
+ * initializing the screen.
+ */
+int
+miScanLineWidth(
+    unsigned int /*xsize*/,
+    unsigned int /*ysize*/,
+    unsigned int /*width*/,
+    unsigned long /*BankSize*/,
+    PixmapFormatRec * /*pBankFormat*/,
+    unsigned int /*nWidthUnit*/
+);
+
+#endif /* __MIBANK_H__ */