xserver git update 11/6/2010

1 files changed, 1177 insertions, 1140 deletions

diff --git a/xorg-server/hw/xfree86/dri2/dri2.c b/xorg-server/hw/xfree86/dri2/dri2.c
index 29c917f21..bb1be358b 100644
--- a/xorg-server/hw/xfree86/dri2/dri2.c
+++ b/xorg-server/hw/xfree86/dri2/dri2.c
@@ -1,1140 +1,1177 @@
-/*
- * Copyright © 2007, 2008 Red Hat, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Soft-
- * ware"), to deal in the Software without restriction, including without
- * limitation the rights to use, copy, modify, merge, publish, distribute,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, provided that the above copyright
- * notice(s) and this permission notice appear in all copies of the Soft-
- * ware and that both the above copyright notice(s) and this permission
- * notice appear in supporting documentation.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
- * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
- * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
- * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
- * QUENTIAL 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 PERFOR-
- * MANCE OF THIS SOFTWARE.
- *
- * Except as contained in this notice, the name of a copyright holder shall
- * not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization of
- * the copyright holder.
- *
- * Authors:
- *   Kristian Høgsberg (krh@redhat.com)
- */
-
-#ifdef HAVE_XORG_CONFIG_H
-#include <xorg-config.h>
-#endif
-
-#include <errno.h>
-#include <xf86drm.h>
-#include "xf86Module.h"
-#include "list.h"
-#include "scrnintstr.h"
-#include "windowstr.h"
-#include "dixstruct.h"
-#include "dri2.h"
-#include "xf86VGAarbiter.h"
-
-#include "xf86.h"
-
-CARD8 dri2_major; /* version of DRI2 supported by DDX */
-CARD8 dri2_minor;
-
-static int           dri2ScreenPrivateKeyIndex;
-static DevPrivateKey dri2ScreenPrivateKey = &dri2ScreenPrivateKeyIndex;
-static int dri2WindowPrivateKeyIndex;
-static DevPrivateKey dri2WindowPrivateKey = &dri2WindowPrivateKeyIndex;
-static int dri2PixmapPrivateKeyIndex;
-static DevPrivateKey dri2PixmapPrivateKey = &dri2PixmapPrivateKeyIndex;
-static RESTYPE       dri2DrawableRes;
-
-typedef struct _DRI2Screen *DRI2ScreenPtr;
-
-typedef struct _DRI2Drawable {
-    DRI2ScreenPtr        dri2_screen;
-    DrawablePtr		 drawable;
-    struct list		 reference_list;
-    int			 width;
-    int			 height;
-    DRI2BufferPtr	*buffers;
-    int			 bufferCount;
-    unsigned int	 swapsPending;
-    ClientPtr		 blockedClient;
-    Bool		 blockedOnMsc;
-    int			 swap_interval;
-    CARD64		 swap_count;
-    int64_t		 target_sbc; /* -1 means no SBC wait outstanding */
-    CARD64		 last_swap_target; /* most recently queued swap target */
-    CARD64		 last_swap_msc; /* msc at completion of most recent swap */
-    CARD64		 last_swap_ust; /* ust at completion of most recent swap */
-    int			 swap_limit; /* for N-buffering */
-} DRI2DrawableRec, *DRI2DrawablePtr;
-
-typedef struct _DRI2Screen {
-    ScreenPtr			 screen;
-    int				 refcnt;
-    unsigned int		 numDrivers;
-    const char			**driverNames;
-    const char			*deviceName;
-    int				 fd;
-    unsigned int		 lastSequence;
-
-    DRI2CreateBufferProcPtr	 CreateBuffer;
-    DRI2DestroyBufferProcPtr	 DestroyBuffer;
-    DRI2CopyRegionProcPtr	 CopyRegion;
-    DRI2ScheduleSwapProcPtr	 ScheduleSwap;
-    DRI2GetMSCProcPtr		 GetMSC;
-    DRI2ScheduleWaitMSCProcPtr	 ScheduleWaitMSC;
-
-    HandleExposuresProcPtr       HandleExposures;
-
-    ConfigNotifyProcPtr		 ConfigNotify;
-} DRI2ScreenRec;
-
-static DRI2ScreenPtr
-DRI2GetScreen(ScreenPtr pScreen)
-{
-    return dixLookupPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey);
-}
-
-static DRI2DrawablePtr
-DRI2GetDrawable(DrawablePtr pDraw)
-{
-    WindowPtr pWin;
-    PixmapPtr pPixmap;
-
-    if (pDraw->type == DRAWABLE_WINDOW) {
-	pWin = (WindowPtr) pDraw;
-	return dixLookupPrivate(&pWin->devPrivates, dri2WindowPrivateKey);
-    } else {
-	pPixmap = (PixmapPtr) pDraw;
-	return dixLookupPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey);
-    }
-}
-
-static DRI2DrawablePtr
-DRI2AllocateDrawable(DrawablePtr pDraw)
-{
-    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);
-    DRI2DrawablePtr pPriv;
-    CARD64          ust;
-    WindowPtr pWin;
-    PixmapPtr pPixmap;
-
-    pPriv = malloc(sizeof *pPriv);
-    if (pPriv == NULL)
-	return NULL;
-
-    pPriv->dri2_screen = ds;
-    pPriv->drawable = pDraw;
-    pPriv->width = pDraw->width;
-    pPriv->height = pDraw->height;
-    pPriv->buffers = NULL;
-    pPriv->bufferCount = 0;
-    pPriv->swapsPending = 0;
-    pPriv->blockedClient = NULL;
-    pPriv->blockedOnMsc = FALSE;
-    pPriv->swap_count = 0;
-    pPriv->target_sbc = -1;
-    pPriv->swap_interval = 1;
-    /* Initialize last swap target from DDX if possible */
-    if (!ds->GetMSC || !(*ds->GetMSC)(pDraw, &ust, &pPriv->last_swap_target))
-	pPriv->last_swap_target = 0;
-
-    pPriv->swap_limit = 1; /* default to double buffering */
-    pPriv->last_swap_msc = 0;
-    pPriv->last_swap_ust = 0;
-    list_init(&pPriv->reference_list);
-
-    if (pDraw->type == DRAWABLE_WINDOW) {
-	pWin = (WindowPtr) pDraw;
-	dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, pPriv);
-    } else {
-	pPixmap = (PixmapPtr) pDraw;
-	dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, pPriv);
-    }
-
-    return pPriv;
-}
-
-typedef struct DRI2DrawableRefRec {
-    XID		  id;
-    XID		  dri2_id;
-    DRI2InvalidateProcPtr	invalidate;
-    void	 *priv;
-    struct list	  link;
-} DRI2DrawableRefRec, *DRI2DrawableRefPtr;
-
-static DRI2DrawableRefPtr
-DRI2LookupDrawableRef(DRI2DrawablePtr pPriv, XID id)
-{
-    DRI2DrawableRefPtr ref;
-
-    list_for_each_entry(ref, &pPriv->reference_list, link) {
-	if (ref->id == id)
-	    return ref;
-    }
-    
-    return NULL;
-}
-
-static int
-DRI2AddDrawableRef(DRI2DrawablePtr pPriv, XID id, XID dri2_id,
-		   DRI2InvalidateProcPtr invalidate, void *priv)
-{
-    DRI2DrawableRefPtr ref;
-
-    ref = malloc(sizeof *ref);
-    if (ref == NULL)
-	return BadAlloc;
-	
-    if (!AddResource(dri2_id, dri2DrawableRes, pPriv))
-	return BadAlloc;
-    if (!DRI2LookupDrawableRef(pPriv, id))
-	if (!AddResource(id, dri2DrawableRes, pPriv))
-	    return BadAlloc;
-
-    ref->id = id;
-    ref->dri2_id = dri2_id; 
-    ref->invalidate = invalidate;
-    ref->priv = priv;
-    list_add(&ref->link, &pPriv->reference_list);
-
-    return Success;
-}
-
-int
-DRI2CreateDrawable(ClientPtr client, DrawablePtr pDraw, XID id,
-		   DRI2InvalidateProcPtr invalidate, void *priv)
-{
-    DRI2DrawablePtr pPriv;
-    XID dri2_id;
-    int rc;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL)
-	pPriv = DRI2AllocateDrawable(pDraw);
-    if (pPriv == NULL)
-	return BadAlloc;
-    
-    dri2_id = FakeClientID(client->index);
-    rc = DRI2AddDrawableRef(pPriv, id, dri2_id, invalidate, priv);
-    if (rc != Success)
-	return rc;
-
-    return Success;
-}
-
-static int DRI2DrawableGone(pointer p, XID id)
-{
-    DRI2DrawablePtr pPriv = p;
-    DRI2ScreenPtr   ds = pPriv->dri2_screen;
-    DRI2DrawableRefPtr ref, next;
-    WindowPtr pWin;
-    PixmapPtr pPixmap;
-    DrawablePtr pDraw;
-    int i;
-
-    list_for_each_entry_safe(ref, next, &pPriv->reference_list, link) {
-	if (ref->dri2_id == id) {
-	    list_del(&ref->link);
-	    /* If this was the last ref under this X drawable XID,
-	     * unregister the X drawable resource. */
-	    if (!DRI2LookupDrawableRef(pPriv, ref->id))
-		FreeResourceByType(ref->id, dri2DrawableRes, TRUE);
-	    free(ref);
-	    break;
-	}
-
-	if (ref->id == id) {
-	    list_del(&ref->link);
-	    FreeResourceByType(ref->dri2_id, dri2DrawableRes, TRUE);
-	    free(ref);
-	}
-    }
-
-    if (!list_is_empty(&pPriv->reference_list))
-	return Success;
-
-    pDraw = pPriv->drawable;
-    if (pDraw->type == DRAWABLE_WINDOW) {
-	pWin = (WindowPtr) pDraw;
-	dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, NULL);
-    } else {
-	pPixmap = (PixmapPtr) pDraw;
-	dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, NULL);
-    }
-
-    if (pPriv->buffers != NULL) {
-	for (i = 0; i < pPriv->bufferCount; i++)
-	    (*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);
-
-	free(pPriv->buffers);
-    }
-
-    free(pPriv);
-
-    return Success;
-}
-
-static int
-find_attachment(DRI2DrawablePtr pPriv, unsigned attachment)
-{
-    int i;
-
-    if (pPriv->buffers == NULL) {
-	return -1;
-    }
-
-    for (i = 0; i < pPriv->bufferCount; i++) {
-	if ((pPriv->buffers[i] != NULL)
-	    && (pPriv->buffers[i]->attachment == attachment)) {
-	    return i;
-	}
-    }
-
-    return -1;
-}
-
-static Bool
-allocate_or_reuse_buffer(DrawablePtr pDraw, DRI2ScreenPtr ds,
-			 DRI2DrawablePtr pPriv,
-			 unsigned int attachment, unsigned int format,
-			 int dimensions_match, DRI2BufferPtr *buffer)
-{
-    int old_buf = find_attachment(pPriv, attachment);
-
-    if ((old_buf < 0)
-	|| !dimensions_match
-	|| (pPriv->buffers[old_buf]->format != format)) {
-	*buffer = (*ds->CreateBuffer)(pDraw, attachment, format);
-	return TRUE;
-
-    } else {
-	*buffer = pPriv->buffers[old_buf];
-	pPriv->buffers[old_buf] = NULL;
-	return FALSE;
-    }
-}
-
-static void
-update_dri2_drawable_buffers(DRI2DrawablePtr pPriv, DrawablePtr pDraw,
-			     DRI2BufferPtr *buffers, int *out_count, int *width, int *height)
-{
-    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);
-    int i;
-
-    if (pPriv->buffers != NULL) {
-	for (i = 0; i < pPriv->bufferCount; i++) {
-	    if (pPriv->buffers[i] != NULL) {
-		(*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);
-	    }
-	}
-
-	free(pPriv->buffers);
-    }
-
-    pPriv->buffers = buffers;
-    pPriv->bufferCount = *out_count;
-    pPriv->width = pDraw->width;
-    pPriv->height = pDraw->height;
-    *width = pPriv->width;
-    *height = pPriv->height;
-}
-
-static DRI2BufferPtr *
-do_get_buffers(DrawablePtr pDraw, int *width, int *height,
-	       unsigned int *attachments, int count, int *out_count,
-	       int has_format)
-{
-    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);
-    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);
-    DRI2BufferPtr  *buffers;
-    int need_real_front = 0;
-    int need_fake_front = 0;
-    int have_fake_front = 0;
-    int front_format = 0;
-    int dimensions_match;
-    int buffers_changed = 0;
-    int i;
-
-    if (!pPriv) {
-	*width = pDraw->width;
-	*height = pDraw->height;
-	*out_count = 0;
-	return NULL;
-    }
-
-    dimensions_match = (pDraw->width == pPriv->width)
-	&& (pDraw->height == pPriv->height);
-
-    buffers = malloc((count + 1) * sizeof(buffers[0]));
-
-    for (i = 0; i < count; i++) {
-	const unsigned attachment = *(attachments++);
-	const unsigned format = (has_format) ? *(attachments++) : 0;
-
-	if (allocate_or_reuse_buffer(pDraw, ds, pPriv, attachment,
-				     format, dimensions_match,
-				     &buffers[i]))
-		buffers_changed = 1;
-
-	if (buffers[i] == NULL)
-	    goto err_out;
-
-	/* If the drawable is a window and the front-buffer is requested,
-	 * silently add the fake front-buffer to the list of requested
-	 * attachments.  The counting logic in the loop accounts for the case
-	 * where the client requests both the fake and real front-buffer.
-	 */
-	if (attachment == DRI2BufferBackLeft) {
-	    need_real_front++;
-	    front_format = format;
-	}
-
-	if (attachment == DRI2BufferFrontLeft) {
-	    need_real_front--;
-	    front_format = format;
-
-	    if (pDraw->type == DRAWABLE_WINDOW) {
-		need_fake_front++;
-	    }
-	}
-
-	if (pDraw->type == DRAWABLE_WINDOW) {
-	    if (attachment == DRI2BufferFakeFrontLeft) {
-		need_fake_front--;
-		have_fake_front = 1;
-	    }
-	}
-    }
-
-    if (need_real_front > 0) {
-	if (allocate_or_reuse_buffer(pDraw, ds, pPriv, DRI2BufferFrontLeft,
-				     front_format, dimensions_match,
-				     &buffers[i]))
-	    buffers_changed = 1;
-
-	if (buffers[i] == NULL)
-	    goto err_out;
-	i++;
-    }
-
-    if (need_fake_front > 0) {
-	if (allocate_or_reuse_buffer(pDraw, ds, pPriv, DRI2BufferFakeFrontLeft,
-				     front_format, dimensions_match,
-				     &buffers[i]))
-	    buffers_changed = 1;
-
-	if (buffers[i] == NULL)
-	    goto err_out;
-
-	i++;
-	have_fake_front = 1;
-    }
-
-    *out_count = i;
-
-    update_dri2_drawable_buffers(pPriv, pDraw, buffers, out_count, width, height);
-
-    /* If the client is getting a fake front-buffer, pre-fill it with the
-     * contents of the real front-buffer.  This ensures correct operation of
-     * applications that call glXWaitX before calling glDrawBuffer.
-     */
-    if (have_fake_front && buffers_changed) {
-	BoxRec box;
-	RegionRec region;
-
-	box.x1 = 0;
-	box.y1 = 0;
-	box.x2 = pPriv->width;
-	box.y2 = pPriv->height;
-	REGION_INIT(pDraw->pScreen, &region, &box, 0);
-
-	DRI2CopyRegion(pDraw, &region, DRI2BufferFakeFrontLeft,
-		       DRI2BufferFrontLeft);
-    }
-
-    return pPriv->buffers;
-
-err_out:
-
-    *out_count = 0;
-
-    for (i = 0; i < count; i++) {
-	    if (buffers[i] != NULL)
-		    (*ds->DestroyBuffer)(pDraw, buffers[i]);
-    }
-
-    free(buffers);
-    buffers = NULL;
-
-    update_dri2_drawable_buffers(pPriv, pDraw, buffers, out_count, width, height);
-
-    return buffers;
-}
-
-DRI2BufferPtr *
-DRI2GetBuffers(DrawablePtr pDraw, int *width, int *height,
-	       unsigned int *attachments, int count, int *out_count)
-{
-    return do_get_buffers(pDraw, width, height, attachments, count,
-			  out_count, FALSE);
-}
-
-DRI2BufferPtr *
-DRI2GetBuffersWithFormat(DrawablePtr pDraw, int *width, int *height,
-			 unsigned int *attachments, int count, int *out_count)
-{
-    return do_get_buffers(pDraw, width, height, attachments, count,
-			  out_count, TRUE);
-}
-
-static void
-DRI2InvalidateDrawable(DrawablePtr pDraw)
-{
-    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);
-    DRI2DrawableRefPtr ref;
-
-    if (!pPriv)
-        return;
-
-    list_for_each_entry(ref, &pPriv->reference_list, link)
-	ref->invalidate(pDraw, ref->priv);
-}
-
-/*
- * In the direct rendered case, we throttle the clients that have more
- * than their share of outstanding swaps (and thus busy buffers) when a
- * new GetBuffers request is received.  In the AIGLX case, we allow the
- * client to get the new buffers, but throttle when the next GLX request
- * comes in (see __glXDRIcontextWait()).
- */
-Bool
-DRI2ThrottleClient(ClientPtr client, DrawablePtr pDraw)
-{
-    DRI2DrawablePtr pPriv;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL)
-	return FALSE;
-
-    /* Throttle to swap limit */
-    if ((pPriv->swapsPending >= pPriv->swap_limit) &&
-	!pPriv->blockedClient) {
-	ResetCurrentRequest(client);
-	client->sequence--;
-	IgnoreClient(client);
-	pPriv->blockedClient = client;
-	return TRUE;
-    }
-
-    return FALSE;
-}
-
-static void
-__DRI2BlockClient(ClientPtr client, DRI2DrawablePtr pPriv)
-{
-    if (pPriv->blockedClient == NULL) {
-	IgnoreClient(client);
-	pPriv->blockedClient = client;
-    }
-}
-
-void
-DRI2BlockClient(ClientPtr client, DrawablePtr pDraw)
-{
-    DRI2DrawablePtr pPriv;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL)
-	return;
-
-    __DRI2BlockClient(client, pPriv);
-    pPriv->blockedOnMsc = TRUE;
-}
-
-int
-DRI2CopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
-	       unsigned int dest, unsigned int src)
-{
-    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);
-    DRI2DrawablePtr pPriv;
-    DRI2BufferPtr   pDestBuffer, pSrcBuffer;
-    int		    i;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL)
-	return BadDrawable;
-
-    pDestBuffer = NULL;
-    pSrcBuffer = NULL;
-    for (i = 0; i < pPriv->bufferCount; i++)
-    {
-	if (pPriv->buffers[i]->attachment == dest)
-	    pDestBuffer = (DRI2BufferPtr) pPriv->buffers[i];
-	if (pPriv->buffers[i]->attachment == src)
-	    pSrcBuffer = (DRI2BufferPtr) pPriv->buffers[i];
-    }
-    if (pSrcBuffer == NULL || pDestBuffer == NULL)
-	return BadValue;
-
-    (*ds->CopyRegion)(pDraw, pRegion, pDestBuffer, pSrcBuffer);
-
-    return Success;
-}
-
-/* Can this drawable be page flipped? */
-Bool
-DRI2CanFlip(DrawablePtr pDraw)
-{
-    ScreenPtr pScreen = pDraw->pScreen;
-    WindowPtr pWin, pRoot;
-    PixmapPtr pWinPixmap, pRootPixmap;
-
-    if (pDraw->type == DRAWABLE_PIXMAP)
-	return TRUE;
-
-    pRoot = WindowTable[pScreen->myNum];
-    pRootPixmap = pScreen->GetWindowPixmap(pRoot);
-
-    pWin = (WindowPtr) pDraw;
-    pWinPixmap = pScreen->GetWindowPixmap(pWin);
-    if (pRootPixmap != pWinPixmap)
-	return FALSE;
-    if (!REGION_EQUAL(pScreen, &pWin->clipList, &pRoot->winSize))
-	return FALSE;
-
-    return TRUE;
-}
-
-/* Can we do a pixmap exchange instead of a blit? */
-Bool
-DRI2CanExchange(DrawablePtr pDraw)
-{
-    return FALSE;
-}
-
-void
-DRI2WaitMSCComplete(ClientPtr client, DrawablePtr pDraw, int frame,
-		    unsigned int tv_sec, unsigned int tv_usec)
-{
-    DRI2DrawablePtr pPriv;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL)
-	return;
-
-    ProcDRI2WaitMSCReply(client, ((CARD64)tv_sec * 1000000) + tv_usec,
-			 frame, pPriv->swap_count);
-
-    if (pPriv->blockedClient)
-	AttendClient(pPriv->blockedClient);
-
-    pPriv->blockedClient = NULL;
-    pPriv->blockedOnMsc = FALSE;
-}
-
-static void
-DRI2WakeClient(ClientPtr client, DrawablePtr pDraw, int frame,
-	       unsigned int tv_sec, unsigned int tv_usec)
-{
-    ScreenPtr	    pScreen = pDraw->pScreen;
-    DRI2DrawablePtr pPriv;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL) {
-        xf86DrvMsg(pScreen->myNum, X_ERROR,
-		   "[DRI2] %s: bad drawable\n", __func__);
-	return;
-    }
-
-    /*
-     * Swap completed.
-     * Wake the client iff:
-     *   - it was waiting on SBC
-     *   - was blocked due to GLX make current
-     *   - was blocked due to swap throttling
-     *   - is not blocked due to an MSC wait
-     */
-    if (pPriv->target_sbc != -1 &&
-	pPriv->target_sbc <= pPriv->swap_count) {
-	ProcDRI2WaitMSCReply(client, ((CARD64)tv_sec * 1000000) + tv_usec,
-			     frame, pPriv->swap_count);
-	pPriv->target_sbc = -1;
-
-	AttendClient(pPriv->blockedClient);
-	pPriv->blockedClient = NULL;
-    } else if (pPriv->target_sbc == -1 && !pPriv->blockedOnMsc) {
-	if (pPriv->blockedClient) {
-	    AttendClient(pPriv->blockedClient);
-	    pPriv->blockedClient = NULL;
-	}
-    }
-}
-
-void
-DRI2SwapComplete(ClientPtr client, DrawablePtr pDraw, int frame,
-		   unsigned int tv_sec, unsigned int tv_usec, int type,
-		   DRI2SwapEventPtr swap_complete, void *swap_data)
-{
-    ScreenPtr	    pScreen = pDraw->pScreen;
-    DRI2DrawablePtr pPriv;
-    CARD64          ust = 0;
-    BoxRec          box;
-    RegionRec       region;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL) {
-        xf86DrvMsg(pScreen->myNum, X_ERROR,
-		   "[DRI2] %s: bad drawable\n", __func__);
-	return;
-    }
-
-    pPriv->swapsPending--;
-    pPriv->swap_count++;
-
-    box.x1 = 0;
-    box.y1 = 0;
-    box.x2 = pDraw->width;
-    box.y2 = pDraw->height;
-    REGION_INIT(pScreen, &region, &box, 0);
-    DRI2CopyRegion(pDraw, &region, DRI2BufferFakeFrontLeft,
-		   DRI2BufferFrontLeft);
-
-    ust = ((CARD64)tv_sec * 1000000) + tv_usec;
-    if (swap_complete)
-	swap_complete(client, swap_data, type, ust, frame, pPriv->swap_count);
-
-    pPriv->last_swap_msc = frame;
-    pPriv->last_swap_ust = ust;
-
-    DRI2WakeClient(client, pDraw, frame, tv_sec, tv_usec);
-}
-
-Bool
-DRI2WaitSwap(ClientPtr client, DrawablePtr pDrawable)
-{
-    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDrawable);
-
-    /* If we're currently waiting for a swap on this drawable, reset
-     * the request and suspend the client.  We only support one
-     * blocked client per drawable. */
-    if ((pPriv->swapsPending) &&
-	pPriv->blockedClient == NULL) {
-	ResetCurrentRequest(client);
-	client->sequence--;
-	__DRI2BlockClient(client, pPriv);
-	return TRUE;
-    }
-
-    return FALSE;
-}
-
-int
-DRI2SwapBuffers(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,
-		CARD64 divisor, CARD64 remainder, CARD64 *swap_target,
-		DRI2SwapEventPtr func, void *data)
-{
-    ScreenPtr       pScreen = pDraw->pScreen;
-    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);
-    DRI2DrawablePtr pPriv;
-    DRI2BufferPtr   pDestBuffer = NULL, pSrcBuffer = NULL;
-    int             ret, i;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL) {
-        xf86DrvMsg(pScreen->myNum, X_ERROR,
-		   "[DRI2] %s: bad drawable\n", __func__);
-	return BadDrawable;
-    }
-
-    for (i = 0; i < pPriv->bufferCount; i++) {
-	if (pPriv->buffers[i]->attachment == DRI2BufferFrontLeft)
-	    pDestBuffer = (DRI2BufferPtr) pPriv->buffers[i];
-	if (pPriv->buffers[i]->attachment == DRI2BufferBackLeft)
-	    pSrcBuffer = (DRI2BufferPtr) pPriv->buffers[i];
-    }
-    if (pSrcBuffer == NULL || pDestBuffer == NULL) {
-        xf86DrvMsg(pScreen->myNum, X_ERROR,
-		   "[DRI2] %s: drawable has no back or front?\n", __func__);
-	return BadDrawable;
-    }
-
-    /* Old DDX or no swap interval, just blit */
-    if (!ds->ScheduleSwap || !pPriv->swap_interval) {
-	BoxRec box;
-	RegionRec region;
-
-	box.x1 = 0;
-	box.y1 = 0;
-	box.x2 = pDraw->width;
-	box.y2 = pDraw->height;
-	REGION_INIT(pScreen, &region, &box, 0);
-
-	pPriv->swapsPending++;
-
-	(*ds->CopyRegion)(pDraw, &region, pDestBuffer, pSrcBuffer);
-	DRI2SwapComplete(client, pDraw, target_msc, 0, 0, DRI2_BLIT_COMPLETE,
-			 func, data);
-	return Success;
-    }
-
-    /*
-     * In the simple glXSwapBuffers case, all params will be 0, and we just
-     * need to schedule a swap for the last swap target + the swap interval.
-     */
-    if (target_msc == 0 && divisor == 0 && remainder == 0) {
-	/*
-	 * Swap target for this swap is last swap target + swap interval since
-	 * we have to account for the current swap count, interval, and the
-	 * number of pending swaps.
-	 */
-	*swap_target = pPriv->last_swap_target + pPriv->swap_interval;
-    } else {
-	/* glXSwapBuffersMscOML could have a 0 target_msc, honor it */
-	*swap_target = target_msc;
-    }
-
-    pPriv->swapsPending++;
-    ret = (*ds->ScheduleSwap)(client, pDraw, pDestBuffer, pSrcBuffer,
-			      swap_target, divisor, remainder, func, data);
-    if (!ret) {
-	pPriv->swapsPending--; /* didn't schedule */
-        xf86DrvMsg(pScreen->myNum, X_ERROR,
-		   "[DRI2] %s: driver failed to schedule swap\n", __func__);
-	return BadDrawable;
-    }
-
-    pPriv->last_swap_target = *swap_target;
-
-    /* According to spec, return expected swapbuffers count SBC after this swap
-     * will complete.
-     */
-    *swap_target = pPriv->swap_count + pPriv->swapsPending;
-
-    DRI2InvalidateDrawable(pDraw);
-
-    return Success;
-}
-
-void
-DRI2SwapInterval(DrawablePtr pDrawable, int interval)
-{
-    ScreenPtr       pScreen = pDrawable->pScreen;
-    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDrawable);
-
-    if (pPriv == NULL) {
-        xf86DrvMsg(pScreen->myNum, X_ERROR,
-		   "[DRI2] %s: bad drawable\n", __func__);
-	return;
-    }
-
-    /* fixme: check against arbitrary max? */
-    pPriv->swap_interval = interval;
-}
-
-int
-DRI2GetMSC(DrawablePtr pDraw, CARD64 *ust, CARD64 *msc, CARD64 *sbc)
-{
-    ScreenPtr pScreen = pDraw->pScreen;
-    DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
-    DRI2DrawablePtr pPriv;
-    Bool ret;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL) {
-        xf86DrvMsg(pScreen->myNum, X_ERROR,
-		   "[DRI2] %s: bad drawable\n", __func__);
-	return BadDrawable;
-    }
-
-    if (!ds->GetMSC) {
-	*ust = 0;
-	*msc = 0;
-	*sbc = pPriv->swap_count;
-	return Success;
-    }
-
-    /*
-     * Spec needs to be updated to include unmapped or redirected
-     * drawables
-     */
-
-    ret = (*ds->GetMSC)(pDraw, ust, msc);
-    if (!ret)
-	return BadDrawable;
-
-    *sbc = pPriv->swap_count;
-
-    return Success;
-}
-
-int
-DRI2WaitMSC(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,
-	    CARD64 divisor, CARD64 remainder)
-{
-    DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
-    DRI2DrawablePtr pPriv;
-    Bool ret;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL)
-	return BadDrawable;
-
-    /* Old DDX just completes immediately */
-    if (!ds->ScheduleWaitMSC) {
-	DRI2WaitMSCComplete(client, pDraw, target_msc, 0, 0);
-
-	return Success;
-    }
-
-    ret = (*ds->ScheduleWaitMSC)(client, pDraw, target_msc, divisor, remainder);
-    if (!ret)
-	return BadDrawable;
-
-    return Success;
-}
-
-int
-DRI2WaitSBC(ClientPtr client, DrawablePtr pDraw, CARD64 target_sbc,
-	    CARD64 *ust, CARD64 *msc, CARD64 *sbc)
-{
-    DRI2DrawablePtr pPriv;
-
-    pPriv = DRI2GetDrawable(pDraw);
-    if (pPriv == NULL)
-	return BadDrawable;
-
-    /* target_sbc == 0 means to block until all pending swaps are
-     * finished. Recalculate target_sbc to get that behaviour.
-     */
-    if (target_sbc == 0)
-        target_sbc = pPriv->swap_count + pPriv->swapsPending;
-
-    /* If current swap count already >= target_sbc,
-     * return immediately with (ust, msc, sbc) triplet of
-     * most recent completed swap.
-     */
-    if (pPriv->swap_count >= target_sbc) {
-        *sbc = pPriv->swap_count;
-        *msc = pPriv->last_swap_msc;
-        *ust = pPriv->last_swap_ust;
-        return Success;
-    }
-
-    pPriv->target_sbc = target_sbc;
-    __DRI2BlockClient(client, pPriv);
-
-    return Success;
-}
-
-Bool
-DRI2HasSwapControl(ScreenPtr pScreen)
-{
-    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
-
-    return (ds->ScheduleSwap && ds->GetMSC);
-}
-
-Bool
-DRI2Connect(ScreenPtr pScreen, unsigned int driverType, int *fd,
-	    const char **driverName, const char **deviceName)
-{
-    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
-
-    if (ds == NULL || driverType >= ds->numDrivers ||
-	    !ds->driverNames[driverType])
-	return FALSE;
-
-    *fd = ds->fd;
-    *driverName = ds->driverNames[driverType];
-    *deviceName = ds->deviceName;
-
-    return TRUE;
-}
-
-Bool
-DRI2Authenticate(ScreenPtr pScreen, drm_magic_t magic)
-{
-    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
-
-    if (ds == NULL || drmAuthMagic(ds->fd, magic))
-	return FALSE;
-
-    return TRUE;
-}
-
-static void
-DRI2ConfigNotify(WindowPtr pWin, int x, int y, int w, int h, int bw,
-		 WindowPtr pSib)
-{
-    DrawablePtr pDraw = (DrawablePtr)pWin;
-    ScreenPtr pScreen = pDraw->pScreen;
-    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
-    DRI2DrawablePtr dd = DRI2GetDrawable(pDraw);
-
-    if (ds->ConfigNotify) {
-	pScreen->ConfigNotify = ds->ConfigNotify;
-
-	(*pScreen->ConfigNotify)(pWin, x, y, w, h, bw, pSib);
-
-	ds->ConfigNotify = pScreen->ConfigNotify;
-	pScreen->ConfigNotify = DRI2ConfigNotify;
-    }
-
-    if (!dd || (dd->width == w && dd->height == h))
-	return;
-
-    DRI2InvalidateDrawable(pDraw);
-}
-
-Bool
-DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
-{
-    DRI2ScreenPtr ds;
-    const char* driverTypeNames[] = {
-	"DRI", /* DRI2DriverDRI */
-	"VDPAU", /* DRI2DriverVDPAU */
-    };
-    unsigned int i;
-    CARD8 cur_minor;
-
-    if (info->version < 3)
-	return FALSE;
-
-    if (!xf86VGAarbiterAllowDRI(pScreen)) {
-        xf86DrvMsg(pScreen->myNum, X_WARNING,
-                  "[DRI2] Direct rendering is not supported when VGA arb is necessary for the device\n");
-        return FALSE;
-    }
-
-    ds = calloc(1, sizeof *ds);
-    if (!ds)
-	return FALSE;
-
-    ds->screen         = pScreen;
-    ds->fd	       = info->fd;
-    ds->deviceName     = info->deviceName;
-    dri2_major         = 1;
-
-    ds->CreateBuffer   = info->CreateBuffer;
-    ds->DestroyBuffer  = info->DestroyBuffer;
-    ds->CopyRegion     = info->CopyRegion;
-
-    if (info->version >= 4) {
-	ds->ScheduleSwap = info->ScheduleSwap;
-	ds->ScheduleWaitMSC = info->ScheduleWaitMSC;
-	ds->GetMSC = info->GetMSC;
-	cur_minor = 3;
-    } else {
-	cur_minor = 1;
-    }
-
-    /* Initialize minor if needed and set to minimum provied by DDX */
-    if (!dri2_minor || dri2_minor > cur_minor)
-	dri2_minor = cur_minor;
-
-    if (info->version == 3 || info->numDrivers == 0) {
-	/* Driver too old: use the old-style driverName field */
-	ds->numDrivers = 1;
-	ds->driverNames = malloc(sizeof(*ds->driverNames));
-	if (!ds->driverNames) {
-	    free(ds);
-	    return FALSE;
-	}
-	ds->driverNames[0] = info->driverName;
-    } else {
-	ds->numDrivers = info->numDrivers;
-	ds->driverNames = malloc(info->numDrivers * sizeof(*ds->driverNames));
-	if (!ds->driverNames) {
-	    free(ds);
-	    return FALSE;
-	}
-	memcpy(ds->driverNames, info->driverNames,
-	       info->numDrivers * sizeof(*ds->driverNames));
-    }
-
-    dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, ds);
-
-    ds->ConfigNotify = pScreen->ConfigNotify;
-    pScreen->ConfigNotify = DRI2ConfigNotify;
-
-    xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2] Setup complete\n");
-    for (i = 0; i < sizeof(driverTypeNames) / sizeof(driverTypeNames[0]); i++) {
-	if (i < ds->numDrivers && ds->driverNames[i]) {
-	    xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2]   %s driver: %s\n",
-		       driverTypeNames[i], ds->driverNames[i]);
-	}
-    }
-
-    return TRUE;
-}
-
-void
-DRI2CloseScreen(ScreenPtr pScreen)
-{
-    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
-
-    free(ds->driverNames);
-    free(ds);
-    dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, NULL);
-}
-
-extern ExtensionModule dri2ExtensionModule;
-
-static pointer
-DRI2Setup(pointer module, pointer opts, int *errmaj, int *errmin)
-{
-    static Bool setupDone = FALSE;
-
-    dri2DrawableRes = CreateNewResourceType(DRI2DrawableGone, "DRI2Drawable");
-
-    if (!setupDone)
-    {
-	setupDone = TRUE;
-	LoadExtension(&dri2ExtensionModule, FALSE);
-    }
-    else
-    {
-	if (errmaj)
-	    *errmaj = LDR_ONCEONLY;
-    }
-
-    return (pointer) 1;
-}
-
-static XF86ModuleVersionInfo DRI2VersRec =
-{
-    "dri2",
-    MODULEVENDORSTRING,
-    MODINFOSTRING1,
-    MODINFOSTRING2,
-    XORG_VERSION_CURRENT,
-    1, 2, 0,
-    ABI_CLASS_EXTENSION,
-    ABI_EXTENSION_VERSION,
-    MOD_CLASS_NONE,
-    { 0, 0, 0, 0 }
-};
-
-_X_EXPORT XF86ModuleData dri2ModuleData = { &DRI2VersRec, DRI2Setup, NULL };
-
-void
-DRI2Version(int *major, int *minor)
-{
-    if (major != NULL)
-	*major = DRI2VersRec.majorversion;
-
-    if (minor != NULL)
-	*minor = DRI2VersRec.minorversion;
-}
+/*

+ * Copyright © 2007, 2008 Red Hat, Inc.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Soft-

+ * ware"), to deal in the Software without restriction, including without

+ * limitation the rights to use, copy, modify, merge, publish, distribute,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, provided that the above copyright

+ * notice(s) and this permission notice appear in all copies of the Soft-

+ * ware and that both the above copyright notice(s) and this permission

+ * notice appear in supporting documentation.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-

+ * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY

+ * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN

+ * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-

+ * QUENTIAL 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 PERFOR-

+ * MANCE OF THIS SOFTWARE.

+ *

+ * Except as contained in this notice, the name of a copyright holder shall

+ * not be used in advertising or otherwise to promote the sale, use or

+ * other dealings in this Software without prior written authorization of

+ * the copyright holder.

+ *

+ * Authors:

+ *   Kristian Høgsberg (krh@redhat.com)

+ */

+

+#ifdef HAVE_XORG_CONFIG_H

+#include <xorg-config.h>

+#endif

+

+#include <errno.h>

+#ifdef WITH_LIBDRM

+#include <xf86drm.h>

+#endif

+#include "xf86Module.h"

+#include "list.h"

+#include "scrnintstr.h"

+#include "windowstr.h"

+#include "dixstruct.h"

+#include "dri2.h"

+#include "xf86VGAarbiter.h"

+

+#include "xf86.h"

+

+CARD8 dri2_major; /* version of DRI2 supported by DDX */

+CARD8 dri2_minor;

+

+static DevPrivateKeyRec dri2ScreenPrivateKeyRec;

+#define dri2ScreenPrivateKey (&dri2ScreenPrivateKeyRec)

+

+static DevPrivateKeyRec dri2WindowPrivateKeyRec;

+#define dri2WindowPrivateKey (&dri2WindowPrivateKeyRec)

+

+static DevPrivateKeyRec dri2PixmapPrivateKeyRec;

+#define dri2PixmapPrivateKey (&dri2PixmapPrivateKeyRec)

+

+static RESTYPE       dri2DrawableRes;

+

+typedef struct _DRI2Screen *DRI2ScreenPtr;

+

+typedef struct _DRI2Drawable {

+    DRI2ScreenPtr        dri2_screen;

+    DrawablePtr		 drawable;

+    struct list		 reference_list;

+    int			 width;

+    int			 height;

+    DRI2BufferPtr	*buffers;

+    int			 bufferCount;

+    unsigned int	 swapsPending;

+    ClientPtr		 blockedClient;

+    Bool		 blockedOnMsc;

+    int			 swap_interval;

+    CARD64		 swap_count;

+    int64_t		 target_sbc; /* -1 means no SBC wait outstanding */

+    CARD64		 last_swap_target; /* most recently queued swap target */

+    CARD64		 last_swap_msc; /* msc at completion of most recent swap */

+    CARD64		 last_swap_ust; /* ust at completion of most recent swap */

+    int			 swap_limit; /* for N-buffering */

+} DRI2DrawableRec, *DRI2DrawablePtr;

+

+typedef struct _DRI2Screen {

+    ScreenPtr			 screen;

+    int				 refcnt;

+    unsigned int		 numDrivers;

+    const char			**driverNames;

+    const char			*deviceName;

+    int				 fd;

+    unsigned int		 lastSequence;

+

+    DRI2CreateBufferProcPtr	 CreateBuffer;

+    DRI2DestroyBufferProcPtr	 DestroyBuffer;

+    DRI2CopyRegionProcPtr	 CopyRegion;

+    DRI2ScheduleSwapProcPtr	 ScheduleSwap;

+    DRI2GetMSCProcPtr		 GetMSC;

+    DRI2ScheduleWaitMSCProcPtr	 ScheduleWaitMSC;

+    DRI2AuthMagicProcPtr	 AuthMagic;

+

+    HandleExposuresProcPtr       HandleExposures;

+

+    ConfigNotifyProcPtr		 ConfigNotify;

+} DRI2ScreenRec;

+

+static DRI2ScreenPtr

+DRI2GetScreen(ScreenPtr pScreen)

+{

+    return dixLookupPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey);

+}

+

+static DRI2DrawablePtr

+DRI2GetDrawable(DrawablePtr pDraw)

+{

+    WindowPtr pWin;

+    PixmapPtr pPixmap;

+

+    switch (pDraw->type) {

+    case DRAWABLE_WINDOW:

+	pWin = (WindowPtr) pDraw;

+	return dixLookupPrivate(&pWin->devPrivates, dri2WindowPrivateKey);

+    case DRAWABLE_PIXMAP:

+	pPixmap = (PixmapPtr) pDraw;

+	return dixLookupPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey);

+    default:

+	return NULL;

+    }

+}

+

+static DRI2DrawablePtr

+DRI2AllocateDrawable(DrawablePtr pDraw)

+{

+    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);

+    DRI2DrawablePtr pPriv;

+    CARD64          ust;

+    WindowPtr pWin;

+    PixmapPtr pPixmap;

+

+    pPriv = malloc(sizeof *pPriv);

+    if (pPriv == NULL)

+	return NULL;

+

+    pPriv->dri2_screen = ds;

+    pPriv->drawable = pDraw;

+    pPriv->width = pDraw->width;

+    pPriv->height = pDraw->height;

+    pPriv->buffers = NULL;

+    pPriv->bufferCount = 0;

+    pPriv->swapsPending = 0;

+    pPriv->blockedClient = NULL;

+    pPriv->blockedOnMsc = FALSE;

+    pPriv->swap_count = 0;

+    pPriv->target_sbc = -1;

+    pPriv->swap_interval = 1;

+    /* Initialize last swap target from DDX if possible */

+    if (!ds->GetMSC || !(*ds->GetMSC)(pDraw, &ust, &pPriv->last_swap_target))

+	pPriv->last_swap_target = 0;

+

+    pPriv->swap_limit = 1; /* default to double buffering */

+    pPriv->last_swap_msc = 0;

+    pPriv->last_swap_ust = 0;

+    list_init(&pPriv->reference_list);

+

+    if (pDraw->type == DRAWABLE_WINDOW) {

+	pWin = (WindowPtr) pDraw;

+	dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, pPriv);

+    } else {

+	pPixmap = (PixmapPtr) pDraw;

+	dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, pPriv);

+    }

+

+    return pPriv;

+}

+

+typedef struct DRI2DrawableRefRec {

+    XID		  id;

+    XID		  dri2_id;

+    DRI2InvalidateProcPtr	invalidate;

+    void	 *priv;

+    struct list	  link;

+} DRI2DrawableRefRec, *DRI2DrawableRefPtr;

+

+static DRI2DrawableRefPtr

+DRI2LookupDrawableRef(DRI2DrawablePtr pPriv, XID id)

+{

+    DRI2DrawableRefPtr ref;

+

+    list_for_each_entry(ref, &pPriv->reference_list, link) {

+	if (ref->id == id)

+	    return ref;

+    }

+    

+    return NULL;

+}

+

+static int

+DRI2AddDrawableRef(DRI2DrawablePtr pPriv, XID id, XID dri2_id,

+		   DRI2InvalidateProcPtr invalidate, void *priv)

+{

+    DRI2DrawableRefPtr ref;

+

+    ref = malloc(sizeof *ref);

+    if (ref == NULL)

+	return BadAlloc;

+	

+    if (!AddResource(dri2_id, dri2DrawableRes, pPriv))

+	return BadAlloc;

+    if (!DRI2LookupDrawableRef(pPriv, id))

+	if (!AddResource(id, dri2DrawableRes, pPriv))

+	    return BadAlloc;

+

+    ref->id = id;

+    ref->dri2_id = dri2_id; 

+    ref->invalidate = invalidate;

+    ref->priv = priv;

+    list_add(&ref->link, &pPriv->reference_list);

+

+    return Success;

+}

+

+int

+DRI2CreateDrawable(ClientPtr client, DrawablePtr pDraw, XID id,

+		   DRI2InvalidateProcPtr invalidate, void *priv)

+{

+    DRI2DrawablePtr pPriv;

+    XID dri2_id;

+    int rc;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL)

+	pPriv = DRI2AllocateDrawable(pDraw);

+    if (pPriv == NULL)

+	return BadAlloc;

+    

+    dri2_id = FakeClientID(client->index);

+    rc = DRI2AddDrawableRef(pPriv, id, dri2_id, invalidate, priv);

+    if (rc != Success)

+	return rc;

+

+    return Success;

+}

+

+static int DRI2DrawableGone(pointer p, XID id)

+{

+    DRI2DrawablePtr pPriv = p;

+    DRI2ScreenPtr   ds = pPriv->dri2_screen;

+    DRI2DrawableRefPtr ref, next;

+    WindowPtr pWin;

+    PixmapPtr pPixmap;

+    DrawablePtr pDraw;

+    int i;

+

+    list_for_each_entry_safe(ref, next, &pPriv->reference_list, link) {

+	if (ref->dri2_id == id) {

+	    list_del(&ref->link);

+	    /* If this was the last ref under this X drawable XID,

+	     * unregister the X drawable resource. */

+	    if (!DRI2LookupDrawableRef(pPriv, ref->id))

+		FreeResourceByType(ref->id, dri2DrawableRes, TRUE);

+	    free(ref);

+	    break;

+	}

+

+	if (ref->id == id) {

+	    list_del(&ref->link);

+	    FreeResourceByType(ref->dri2_id, dri2DrawableRes, TRUE);

+	    free(ref);

+	}

+    }

+

+    if (!list_is_empty(&pPriv->reference_list))

+	return Success;

+

+    pDraw = pPriv->drawable;

+    if (pDraw->type == DRAWABLE_WINDOW) {

+	pWin = (WindowPtr) pDraw;

+	dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, NULL);

+    } else {

+	pPixmap = (PixmapPtr) pDraw;

+	dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, NULL);

+    }

+

+    if (pPriv->buffers != NULL) {

+	for (i = 0; i < pPriv->bufferCount; i++)

+	    (*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);

+

+	free(pPriv->buffers);

+    }

+

+    free(pPriv);

+

+    return Success;

+}

+

+static int

+find_attachment(DRI2DrawablePtr pPriv, unsigned attachment)

+{

+    int i;

+

+    if (pPriv->buffers == NULL) {

+	return -1;

+    }

+

+    for (i = 0; i < pPriv->bufferCount; i++) {

+	if ((pPriv->buffers[i] != NULL)

+	    && (pPriv->buffers[i]->attachment == attachment)) {

+	    return i;

+	}

+    }

+

+    return -1;

+}

+

+static Bool

+allocate_or_reuse_buffer(DrawablePtr pDraw, DRI2ScreenPtr ds,

+			 DRI2DrawablePtr pPriv,

+			 unsigned int attachment, unsigned int format,

+			 int dimensions_match, DRI2BufferPtr *buffer)

+{

+    int old_buf = find_attachment(pPriv, attachment);

+

+    if ((old_buf < 0)

+	|| !dimensions_match

+	|| (pPriv->buffers[old_buf]->format != format)) {

+	*buffer = (*ds->CreateBuffer)(pDraw, attachment, format);

+	return TRUE;

+

+    } else {

+	*buffer = pPriv->buffers[old_buf];

+	pPriv->buffers[old_buf] = NULL;

+	return FALSE;

+    }

+}

+

+static void

+update_dri2_drawable_buffers(DRI2DrawablePtr pPriv, DrawablePtr pDraw,

+			     DRI2BufferPtr *buffers, int *out_count, int *width, int *height)

+{

+    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);

+    int i;

+

+    if (pPriv->buffers != NULL) {

+	for (i = 0; i < pPriv->bufferCount; i++) {

+	    if (pPriv->buffers[i] != NULL) {

+		(*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);

+	    }

+	}

+

+	free(pPriv->buffers);

+    }

+

+    pPriv->buffers = buffers;

+    pPriv->bufferCount = *out_count;

+    pPriv->width = pDraw->width;

+    pPriv->height = pDraw->height;

+    *width = pPriv->width;

+    *height = pPriv->height;

+}

+

+static DRI2BufferPtr *

+do_get_buffers(DrawablePtr pDraw, int *width, int *height,

+	       unsigned int *attachments, int count, int *out_count,

+	       int has_format)

+{

+    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);

+    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);

+    DRI2BufferPtr  *buffers;

+    int need_real_front = 0;

+    int need_fake_front = 0;

+    int have_fake_front = 0;

+    int front_format = 0;

+    int dimensions_match;

+    int buffers_changed = 0;

+    int i;

+

+    if (!pPriv) {

+	*width = pDraw->width;

+	*height = pDraw->height;

+	*out_count = 0;

+	return NULL;

+    }

+

+    dimensions_match = (pDraw->width == pPriv->width)

+	&& (pDraw->height == pPriv->height);

+

+    buffers = malloc((count + 1) * sizeof(buffers[0]));

+

+    for (i = 0; i < count; i++) {

+	const unsigned attachment = *(attachments++);

+	const unsigned format = (has_format) ? *(attachments++) : 0;

+

+	if (allocate_or_reuse_buffer(pDraw, ds, pPriv, attachment,

+				     format, dimensions_match,

+				     &buffers[i]))

+		buffers_changed = 1;

+

+	if (buffers[i] == NULL)

+	    goto err_out;

+

+	/* If the drawable is a window and the front-buffer is requested,

+	 * silently add the fake front-buffer to the list of requested

+	 * attachments.  The counting logic in the loop accounts for the case

+	 * where the client requests both the fake and real front-buffer.

+	 */

+	if (attachment == DRI2BufferBackLeft) {

+	    need_real_front++;

+	    front_format = format;

+	}

+

+	if (attachment == DRI2BufferFrontLeft) {

+	    need_real_front--;

+	    front_format = format;

+

+	    if (pDraw->type == DRAWABLE_WINDOW) {

+		need_fake_front++;

+	    }

+	}

+

+	if (pDraw->type == DRAWABLE_WINDOW) {

+	    if (attachment == DRI2BufferFakeFrontLeft) {

+		need_fake_front--;

+		have_fake_front = 1;

+	    }

+	}

+    }

+

+    if (need_real_front > 0) {

+	if (allocate_or_reuse_buffer(pDraw, ds, pPriv, DRI2BufferFrontLeft,

+				     front_format, dimensions_match,

+				     &buffers[i]))

+	    buffers_changed = 1;

+

+	if (buffers[i] == NULL)

+	    goto err_out;

+	i++;

+    }

+

+    if (need_fake_front > 0) {

+	if (allocate_or_reuse_buffer(pDraw, ds, pPriv, DRI2BufferFakeFrontLeft,

+				     front_format, dimensions_match,

+				     &buffers[i]))

+	    buffers_changed = 1;

+

+	if (buffers[i] == NULL)

+	    goto err_out;

+

+	i++;

+	have_fake_front = 1;

+    }

+

+    *out_count = i;

+

+    update_dri2_drawable_buffers(pPriv, pDraw, buffers, out_count, width, height);

+

+    /* If the client is getting a fake front-buffer, pre-fill it with the

+     * contents of the real front-buffer.  This ensures correct operation of

+     * applications that call glXWaitX before calling glDrawBuffer.

+     */

+    if (have_fake_front && buffers_changed) {

+	BoxRec box;

+	RegionRec region;

+

+	box.x1 = 0;

+	box.y1 = 0;

+	box.x2 = pPriv->width;

+	box.y2 = pPriv->height;

+	RegionInit(&region, &box, 0);

+

+	DRI2CopyRegion(pDraw, &region, DRI2BufferFakeFrontLeft,

+		       DRI2BufferFrontLeft);

+    }

+

+    return pPriv->buffers;

+

+err_out:

+

+    *out_count = 0;

+

+    for (i = 0; i < count; i++) {

+	    if (buffers[i] != NULL)

+		    (*ds->DestroyBuffer)(pDraw, buffers[i]);

+    }

+

+    free(buffers);

+    buffers = NULL;

+

+    update_dri2_drawable_buffers(pPriv, pDraw, buffers, out_count, width, height);

+

+    return buffers;

+}

+

+DRI2BufferPtr *

+DRI2GetBuffers(DrawablePtr pDraw, int *width, int *height,

+	       unsigned int *attachments, int count, int *out_count)

+{

+    return do_get_buffers(pDraw, width, height, attachments, count,

+			  out_count, FALSE);

+}

+

+DRI2BufferPtr *

+DRI2GetBuffersWithFormat(DrawablePtr pDraw, int *width, int *height,

+			 unsigned int *attachments, int count, int *out_count)

+{

+    return do_get_buffers(pDraw, width, height, attachments, count,

+			  out_count, TRUE);

+}

+

+static void

+DRI2InvalidateDrawable(DrawablePtr pDraw)

+{

+    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);

+    DRI2DrawableRefPtr ref;

+

+    if (!pPriv)

+        return;

+

+    list_for_each_entry(ref, &pPriv->reference_list, link)

+	ref->invalidate(pDraw, ref->priv);

+}

+

+/*

+ * In the direct rendered case, we throttle the clients that have more

+ * than their share of outstanding swaps (and thus busy buffers) when a

+ * new GetBuffers request is received.  In the AIGLX case, we allow the

+ * client to get the new buffers, but throttle when the next GLX request

+ * comes in (see __glXDRIcontextWait()).

+ */

+Bool

+DRI2ThrottleClient(ClientPtr client, DrawablePtr pDraw)

+{

+    DRI2DrawablePtr pPriv;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL)

+	return FALSE;

+

+    /* Throttle to swap limit */

+    if ((pPriv->swapsPending >= pPriv->swap_limit) &&

+	!pPriv->blockedClient) {

+	ResetCurrentRequest(client);

+	client->sequence--;

+	IgnoreClient(client);

+	pPriv->blockedClient = client;

+	return TRUE;

+    }

+

+    return FALSE;

+}

+

+static void

+__DRI2BlockClient(ClientPtr client, DRI2DrawablePtr pPriv)

+{

+    if (pPriv->blockedClient == NULL) {

+	IgnoreClient(client);

+	pPriv->blockedClient = client;

+    }

+}

+

+void

+DRI2BlockClient(ClientPtr client, DrawablePtr pDraw)

+{

+    DRI2DrawablePtr pPriv;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL)

+	return;

+

+    __DRI2BlockClient(client, pPriv);

+    pPriv->blockedOnMsc = TRUE;

+}

+

+int

+DRI2CopyRegion(DrawablePtr pDraw, RegionPtr pRegion,

+	       unsigned int dest, unsigned int src)

+{

+    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);

+    DRI2DrawablePtr pPriv;

+    DRI2BufferPtr   pDestBuffer, pSrcBuffer;

+    int		    i;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL)

+	return BadDrawable;

+

+    pDestBuffer = NULL;

+    pSrcBuffer = NULL;

+    for (i = 0; i < pPriv->bufferCount; i++)

+    {

+	if (pPriv->buffers[i]->attachment == dest)

+	    pDestBuffer = (DRI2BufferPtr) pPriv->buffers[i];

+	if (pPriv->buffers[i]->attachment == src)

+	    pSrcBuffer = (DRI2BufferPtr) pPriv->buffers[i];

+    }

+    if (pSrcBuffer == NULL || pDestBuffer == NULL)

+	return BadValue;

+

+    (*ds->CopyRegion)(pDraw, pRegion, pDestBuffer, pSrcBuffer);

+

+    return Success;

+}

+

+/* Can this drawable be page flipped? */

+Bool

+DRI2CanFlip(DrawablePtr pDraw)

+{

+    ScreenPtr pScreen = pDraw->pScreen;

+    WindowPtr pWin, pRoot;

+    PixmapPtr pWinPixmap, pRootPixmap;

+

+    if (pDraw->type == DRAWABLE_PIXMAP)

+	return TRUE;

+

+    pRoot = pScreen->root;

+    pRootPixmap = pScreen->GetWindowPixmap(pRoot);

+

+    pWin = (WindowPtr) pDraw;

+    pWinPixmap = pScreen->GetWindowPixmap(pWin);

+    if (pRootPixmap != pWinPixmap)

+	return FALSE;

+    if (!RegionEqual(&pWin->clipList, &pRoot->winSize))

+	return FALSE;

+

+    return TRUE;

+}

+

+/* Can we do a pixmap exchange instead of a blit? */

+Bool

+DRI2CanExchange(DrawablePtr pDraw)

+{

+    return FALSE;

+}

+

+void

+DRI2WaitMSCComplete(ClientPtr client, DrawablePtr pDraw, int frame,

+		    unsigned int tv_sec, unsigned int tv_usec)

+{

+    DRI2DrawablePtr pPriv;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL)

+	return;

+

+    ProcDRI2WaitMSCReply(client, ((CARD64)tv_sec * 1000000) + tv_usec,

+			 frame, pPriv->swap_count);

+

+    if (pPriv->blockedClient)

+	AttendClient(pPriv->blockedClient);

+

+    pPriv->blockedClient = NULL;

+    pPriv->blockedOnMsc = FALSE;

+}

+

+static void

+DRI2WakeClient(ClientPtr client, DrawablePtr pDraw, int frame,

+	       unsigned int tv_sec, unsigned int tv_usec)

+{

+    ScreenPtr	    pScreen = pDraw->pScreen;

+    DRI2DrawablePtr pPriv;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL) {

+        xf86DrvMsg(pScreen->myNum, X_ERROR,

+		   "[DRI2] %s: bad drawable\n", __func__);

+	return;

+    }

+

+    /*

+     * Swap completed.

+     * Wake the client iff:

+     *   - it was waiting on SBC

+     *   - was blocked due to GLX make current

+     *   - was blocked due to swap throttling

+     *   - is not blocked due to an MSC wait

+     */

+    if (pPriv->target_sbc != -1 &&

+	pPriv->target_sbc <= pPriv->swap_count) {

+	ProcDRI2WaitMSCReply(client, ((CARD64)tv_sec * 1000000) + tv_usec,

+			     frame, pPriv->swap_count);

+	pPriv->target_sbc = -1;

+

+	AttendClient(pPriv->blockedClient);

+	pPriv->blockedClient = NULL;

+    } else if (pPriv->target_sbc == -1 && !pPriv->blockedOnMsc) {

+	if (pPriv->blockedClient) {

+	    AttendClient(pPriv->blockedClient);

+	    pPriv->blockedClient = NULL;

+	}

+    }

+}

+

+void

+DRI2SwapComplete(ClientPtr client, DrawablePtr pDraw, int frame,

+		   unsigned int tv_sec, unsigned int tv_usec, int type,

+		   DRI2SwapEventPtr swap_complete, void *swap_data)

+{

+    ScreenPtr	    pScreen = pDraw->pScreen;

+    DRI2DrawablePtr pPriv;

+    CARD64          ust = 0;

+    BoxRec          box;

+    RegionRec       region;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL) {

+        xf86DrvMsg(pScreen->myNum, X_ERROR,

+		   "[DRI2] %s: bad drawable\n", __func__);

+	return;

+    }

+

+    pPriv->swapsPending--;

+    pPriv->swap_count++;

+

+    box.x1 = 0;

+    box.y1 = 0;

+    box.x2 = pDraw->width;

+    box.y2 = pDraw->height;

+    RegionInit(&region, &box, 0);

+    DRI2CopyRegion(pDraw, &region, DRI2BufferFakeFrontLeft,

+		   DRI2BufferFrontLeft);

+

+    ust = ((CARD64)tv_sec * 1000000) + tv_usec;

+    if (swap_complete)

+	swap_complete(client, swap_data, type, ust, frame, pPriv->swap_count);

+

+    pPriv->last_swap_msc = frame;

+    pPriv->last_swap_ust = ust;

+

+    DRI2WakeClient(client, pDraw, frame, tv_sec, tv_usec);

+}

+

+Bool

+DRI2WaitSwap(ClientPtr client, DrawablePtr pDrawable)

+{

+    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDrawable);

+

+    /* If we're currently waiting for a swap on this drawable, reset

+     * the request and suspend the client.  We only support one

+     * blocked client per drawable. */

+    if ((pPriv->swapsPending) &&

+	pPriv->blockedClient == NULL) {

+	ResetCurrentRequest(client);

+	client->sequence--;

+	__DRI2BlockClient(client, pPriv);

+	return TRUE;

+    }

+

+    return FALSE;

+}

+

+int

+DRI2SwapBuffers(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,

+		CARD64 divisor, CARD64 remainder, CARD64 *swap_target,

+		DRI2SwapEventPtr func, void *data)

+{

+    ScreenPtr       pScreen = pDraw->pScreen;

+    DRI2ScreenPtr   ds = DRI2GetScreen(pDraw->pScreen);

+    DRI2DrawablePtr pPriv;

+    DRI2BufferPtr   pDestBuffer = NULL, pSrcBuffer = NULL;

+    int             ret, i;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL) {

+        xf86DrvMsg(pScreen->myNum, X_ERROR,

+		   "[DRI2] %s: bad drawable\n", __func__);

+	return BadDrawable;

+    }

+

+    for (i = 0; i < pPriv->bufferCount; i++) {

+	if (pPriv->buffers[i]->attachment == DRI2BufferFrontLeft)

+	    pDestBuffer = (DRI2BufferPtr) pPriv->buffers[i];

+	if (pPriv->buffers[i]->attachment == DRI2BufferBackLeft)

+	    pSrcBuffer = (DRI2BufferPtr) pPriv->buffers[i];

+    }

+    if (pSrcBuffer == NULL || pDestBuffer == NULL) {

+        xf86DrvMsg(pScreen->myNum, X_ERROR,

+		   "[DRI2] %s: drawable has no back or front?\n", __func__);

+	return BadDrawable;

+    }

+

+    /* Old DDX or no swap interval, just blit */

+    if (!ds->ScheduleSwap || !pPriv->swap_interval) {

+	BoxRec box;

+	RegionRec region;

+

+	box.x1 = 0;

+	box.y1 = 0;

+	box.x2 = pDraw->width;

+	box.y2 = pDraw->height;

+	RegionInit(&region, &box, 0);

+

+	pPriv->swapsPending++;

+

+	(*ds->CopyRegion)(pDraw, &region, pDestBuffer, pSrcBuffer);

+	DRI2SwapComplete(client, pDraw, target_msc, 0, 0, DRI2_BLIT_COMPLETE,

+			 func, data);

+	return Success;

+    }

+

+    /*

+     * In the simple glXSwapBuffers case, all params will be 0, and we just

+     * need to schedule a swap for the last swap target + the swap interval.

+     */

+    if (target_msc == 0 && divisor == 0 && remainder == 0) {

+	/*

+	 * Swap target for this swap is last swap target + swap interval since

+	 * we have to account for the current swap count, interval, and the

+	 * number of pending swaps.

+	 */

+	*swap_target = pPriv->last_swap_target + pPriv->swap_interval;

+    } else {

+	/* glXSwapBuffersMscOML could have a 0 target_msc, honor it */

+	*swap_target = target_msc;

+    }

+

+    pPriv->swapsPending++;

+    ret = (*ds->ScheduleSwap)(client, pDraw, pDestBuffer, pSrcBuffer,

+			      swap_target, divisor, remainder, func, data);

+    if (!ret) {

+	pPriv->swapsPending--; /* didn't schedule */

+        xf86DrvMsg(pScreen->myNum, X_ERROR,

+		   "[DRI2] %s: driver failed to schedule swap\n", __func__);

+	return BadDrawable;

+    }

+

+    pPriv->last_swap_target = *swap_target;

+

+    /* According to spec, return expected swapbuffers count SBC after this swap

+     * will complete.

+     */

+    *swap_target = pPriv->swap_count + pPriv->swapsPending;

+

+    DRI2InvalidateDrawable(pDraw);

+

+    return Success;

+}

+

+void

+DRI2SwapInterval(DrawablePtr pDrawable, int interval)

+{

+    ScreenPtr       pScreen = pDrawable->pScreen;

+    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDrawable);

+

+    if (pPriv == NULL) {

+        xf86DrvMsg(pScreen->myNum, X_ERROR,

+		   "[DRI2] %s: bad drawable\n", __func__);

+	return;

+    }

+

+    /* fixme: check against arbitrary max? */

+    pPriv->swap_interval = interval;

+}

+

+int

+DRI2GetMSC(DrawablePtr pDraw, CARD64 *ust, CARD64 *msc, CARD64 *sbc)

+{

+    ScreenPtr pScreen = pDraw->pScreen;

+    DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);

+    DRI2DrawablePtr pPriv;

+    Bool ret;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL) {

+        xf86DrvMsg(pScreen->myNum, X_ERROR,

+		   "[DRI2] %s: bad drawable\n", __func__);

+	return BadDrawable;

+    }

+

+    if (!ds->GetMSC) {

+	*ust = 0;

+	*msc = 0;

+	*sbc = pPriv->swap_count;

+	return Success;

+    }

+

+    /*

+     * Spec needs to be updated to include unmapped or redirected

+     * drawables

+     */

+

+    ret = (*ds->GetMSC)(pDraw, ust, msc);

+    if (!ret)

+	return BadDrawable;

+

+    *sbc = pPriv->swap_count;

+

+    return Success;

+}

+

+int

+DRI2WaitMSC(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,

+	    CARD64 divisor, CARD64 remainder)

+{

+    DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);

+    DRI2DrawablePtr pPriv;

+    Bool ret;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL)

+	return BadDrawable;

+

+    /* Old DDX just completes immediately */

+    if (!ds->ScheduleWaitMSC) {

+	DRI2WaitMSCComplete(client, pDraw, target_msc, 0, 0);

+

+	return Success;

+    }

+

+    ret = (*ds->ScheduleWaitMSC)(client, pDraw, target_msc, divisor, remainder);

+    if (!ret)

+	return BadDrawable;

+

+    return Success;

+}

+

+int

+DRI2WaitSBC(ClientPtr client, DrawablePtr pDraw, CARD64 target_sbc)

+{

+    DRI2DrawablePtr pPriv;

+

+    pPriv = DRI2GetDrawable(pDraw);

+    if (pPriv == NULL)

+	return BadDrawable;

+

+    /* target_sbc == 0 means to block until all pending swaps are

+     * finished. Recalculate target_sbc to get that behaviour.

+     */

+    if (target_sbc == 0)

+        target_sbc = pPriv->swap_count + pPriv->swapsPending;

+

+    /* If current swap count already >= target_sbc, reply and

+     * return immediately with (ust, msc, sbc) triplet of

+     * most recent completed swap.

+     */

+    if (pPriv->swap_count >= target_sbc) {

+        ProcDRI2WaitMSCReply(client, pPriv->last_swap_ust,

+                             pPriv->last_swap_msc, pPriv->swap_count);

+        return Success;

+    }

+

+    pPriv->target_sbc = target_sbc;

+    __DRI2BlockClient(client, pPriv);

+

+    return Success;

+}

+

+Bool

+DRI2HasSwapControl(ScreenPtr pScreen)

+{

+    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);

+

+    return ds->ScheduleSwap && ds->GetMSC;

+}

+

+Bool

+DRI2Connect(ScreenPtr pScreen, unsigned int driverType, int *fd,

+	    const char **driverName, const char **deviceName)

+{

+    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);

+

+    if (ds == NULL || driverType >= ds->numDrivers ||

+	    !ds->driverNames[driverType])

+	return FALSE;

+

+    *fd = ds->fd;

+    *driverName = ds->driverNames[driverType];

+    *deviceName = ds->deviceName;

+

+    return TRUE;

+}

+

+Bool

+DRI2Authenticate(ScreenPtr pScreen, uint32_t magic)

+{

+    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);

+

+    if (ds == NULL || (*ds->AuthMagic)(ds->fd, magic))

+        return FALSE;

+

+    return TRUE;

+}

+

+static int

+DRI2ConfigNotify(WindowPtr pWin, int x, int y, int w, int h, int bw,

+		 WindowPtr pSib)

+{

+    DrawablePtr pDraw = (DrawablePtr)pWin;

+    ScreenPtr pScreen = pDraw->pScreen;

+    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);

+    DRI2DrawablePtr dd = DRI2GetDrawable(pDraw);

+    int ret;

+

+    if (ds->ConfigNotify) {

+	pScreen->ConfigNotify = ds->ConfigNotify;

+

+	ret = (*pScreen->ConfigNotify)(pWin, x, y, w, h, bw, pSib);

+

+	ds->ConfigNotify = pScreen->ConfigNotify;

+	pScreen->ConfigNotify = DRI2ConfigNotify;

+	if (ret)

+	    return ret;

+    }

+

+    if (!dd || (dd->width == w && dd->height == h))

+	return Success;

+

+    DRI2InvalidateDrawable(pDraw);

+    return Success;

+}

+

+Bool

+DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)

+{

+    DRI2ScreenPtr ds;

+    const char* driverTypeNames[] = {

+	"DRI", /* DRI2DriverDRI */

+	"VDPAU", /* DRI2DriverVDPAU */

+    };

+    unsigned int i;

+    CARD8 cur_minor;

+

+    if (info->version < 3)

+	return FALSE;

+

+    if (!xf86VGAarbiterAllowDRI(pScreen)) {

+        xf86DrvMsg(pScreen->myNum, X_WARNING,

+                  "[DRI2] Direct rendering is not supported when VGA arb is necessary for the device\n");

+        return FALSE;

+    }

+

+    if (!dixRegisterPrivateKey(&dri2ScreenPrivateKeyRec, PRIVATE_SCREEN, 0))

+	return FALSE;

+

+    if (!dixRegisterPrivateKey(&dri2WindowPrivateKeyRec, PRIVATE_WINDOW, 0))

+	return FALSE;

+

+    if (!dixRegisterPrivateKey(&dri2PixmapPrivateKeyRec, PRIVATE_PIXMAP, 0))

+	return FALSE;

+

+    ds = calloc(1, sizeof *ds);

+    if (!ds)

+	return FALSE;

+

+    ds->screen         = pScreen;

+    ds->fd	       = info->fd;

+    ds->deviceName     = info->deviceName;

+    dri2_major         = 1;

+

+    ds->CreateBuffer   = info->CreateBuffer;

+    ds->DestroyBuffer  = info->DestroyBuffer;

+    ds->CopyRegion     = info->CopyRegion;

+

+    if (info->version >= 4) {

+	ds->ScheduleSwap = info->ScheduleSwap;

+	ds->ScheduleWaitMSC = info->ScheduleWaitMSC;

+	ds->GetMSC = info->GetMSC;

+	cur_minor = 3;

+    } else {

+	cur_minor = 1;

+    }

+

+    if (info->version >= 5) {

+        ds->AuthMagic = info->AuthMagic;

+    }

+

+    /*

+     * if the driver doesn't provide an AuthMagic function or the info struct

+     * version is too low, it relies on the old method (using libdrm) or fail

+     */

+    if (!ds->AuthMagic)

+#ifdef WITH_LIBDRM

+        ds->AuthMagic = drmAuthMagic;

+#else

+        goto err_out;

+#endif

+

+    /* Initialize minor if needed and set to minimum provied by DDX */

+    if (!dri2_minor || dri2_minor > cur_minor)

+	dri2_minor = cur_minor;

+

+    if (info->version == 3 || info->numDrivers == 0) {

+	/* Driver too old: use the old-style driverName field */

+	ds->numDrivers = 1;

+	ds->driverNames = malloc(sizeof(*ds->driverNames));

+	if (!ds->driverNames)

+	    goto err_out;

+	ds->driverNames[0] = info->driverName;

+    } else {

+	ds->numDrivers = info->numDrivers;

+	ds->driverNames = malloc(info->numDrivers * sizeof(*ds->driverNames));

+	if (!ds->driverNames)

+		goto err_out;

+	memcpy(ds->driverNames, info->driverNames,

+	       info->numDrivers * sizeof(*ds->driverNames));

+    }

+

+    dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, ds);

+

+    ds->ConfigNotify = pScreen->ConfigNotify;

+    pScreen->ConfigNotify = DRI2ConfigNotify;

+

+    xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2] Setup complete\n");

+    for (i = 0; i < sizeof(driverTypeNames) / sizeof(driverTypeNames[0]); i++) {

+	if (i < ds->numDrivers && ds->driverNames[i]) {

+	    xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2]   %s driver: %s\n",

+		       driverTypeNames[i], ds->driverNames[i]);

+	}

+    }

+

+    return TRUE;

+

+err_out:

+    xf86DrvMsg(pScreen->myNum, X_WARNING,

+            "[DRI2] Initialization failed for info version %d.\n", info->version);

+    free(ds);

+    return FALSE;

+}

+

+void

+DRI2CloseScreen(ScreenPtr pScreen)

+{

+    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);

+

+    free(ds->driverNames);

+    free(ds);

+    dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, NULL);

+}

+

+extern ExtensionModule dri2ExtensionModule;

+

+static pointer

+DRI2Setup(pointer module, pointer opts, int *errmaj, int *errmin)

+{

+    static Bool setupDone = FALSE;

+

+    dri2DrawableRes = CreateNewResourceType(DRI2DrawableGone, "DRI2Drawable");

+

+    if (!setupDone)

+    {

+	setupDone = TRUE;

+	LoadExtension(&dri2ExtensionModule, FALSE);

+    }

+    else

+    {

+	if (errmaj)

+	    *errmaj = LDR_ONCEONLY;

+    }

+

+    return (pointer) 1;

+}

+

+static XF86ModuleVersionInfo DRI2VersRec =

+{

+    "dri2",

+    MODULEVENDORSTRING,

+    MODINFOSTRING1,

+    MODINFOSTRING2,

+    XORG_VERSION_CURRENT,

+    1, 2, 0,

+    ABI_CLASS_EXTENSION,

+    ABI_EXTENSION_VERSION,

+    MOD_CLASS_NONE,

+    { 0, 0, 0, 0 }

+};

+

+_X_EXPORT XF86ModuleData dri2ModuleData = { &DRI2VersRec, DRI2Setup, NULL };

+

+void

+DRI2Version(int *major, int *minor)

+{

+    if (major != NULL)

+	*major = DRI2VersRec.majorversion;

+

+    if (minor != NULL)

+	*minor = DRI2VersRec.minorversion;

+}