Git update 14/1/2010

3 files changed, 740 insertions, 9 deletions

diff --git a/xorg-server/hw/xfree86/dri2/dri2.c b/xorg-server/hw/xfree86/dri2/dri2.c
index d15ced112..3db826e91 100644
--- a/xorg-server/hw/xfree86/dri2/dri2.c
+++ b/xorg-server/hw/xfree86/dri2/dri2.c
@@ -34,10 +34,12 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <xf86drm.h>
 #include "xf86Module.h"
 #include "scrnintstr.h"
 #include "windowstr.h"
+#include "dixstruct.h"
 #include "dri2.h"
 #include "xf86VGAarbiter.h"
 
@@ -56,9 +58,17 @@ typedef struct _DRI2Drawable {
     int			 height;
     DRI2BufferPtr	*buffers;
     int			 bufferCount;
-    unsigned int	 pendingSequence;
+    unsigned int	 swapsPending;
+    ClientPtr		 blockedClient;
+    int			 swap_interval;
+    CARD64		 swap_count;
+    CARD64		 target_sbc; /* -1 means no SBC wait outstanding */
+    CARD64		 last_swap_target; /* most recently queued swap target */
+    int			 swap_limit; /* for N-buffering */
 } DRI2DrawableRec, *DRI2DrawablePtr;
 
+typedef struct _DRI2Screen *DRI2ScreenPtr;
+
 typedef struct _DRI2Screen {
     const char			*driverName;
     const char			*deviceName;
@@ -68,9 +78,12 @@ typedef struct _DRI2Screen {
     DRI2CreateBufferProcPtr	 CreateBuffer;
     DRI2DestroyBufferProcPtr	 DestroyBuffer;
     DRI2CopyRegionProcPtr	 CopyRegion;
+    DRI2ScheduleSwapProcPtr	 ScheduleSwap;
+    DRI2GetMSCProcPtr		 GetMSC;
+    DRI2ScheduleWaitMSCProcPtr	 ScheduleWaitMSC;
 
     HandleExposuresProcPtr       HandleExposures;
-} DRI2ScreenRec, *DRI2ScreenPtr;
+} DRI2ScreenRec;
 
 static DRI2ScreenPtr
 DRI2GetScreen(ScreenPtr pScreen)
@@ -84,6 +97,9 @@ DRI2GetDrawable(DrawablePtr pDraw)
     WindowPtr		  pWin;
     PixmapPtr		  pPixmap;
 
+    if (!pDraw)
+	return NULL;
+
     if (pDraw->type == DRAWABLE_WINDOW)
     {
 	pWin = (WindowPtr) pDraw;
@@ -119,6 +135,13 @@ DRI2CreateDrawable(DrawablePtr pDraw)
     pPriv->height = pDraw->height;
     pPriv->buffers = NULL;
     pPriv->bufferCount = 0;
+    pPriv->swapsPending = 0;
+    pPriv->blockedClient = NULL;
+    pPriv->swap_count = 0;
+    pPriv->target_sbc = -1;
+    pPriv->swap_interval = 1;
+    pPriv->last_swap_target = -1;
+    pPriv->swap_limit = 1; /* default to double buffering */
 
     if (pDraw->type == DRAWABLE_WINDOW)
     {
@@ -308,6 +331,50 @@ DRI2GetBuffersWithFormat(DrawablePtr pDraw, int *width, int *height,
 			  out_count, TRUE);
 }
 
+/*
+ * 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;
+}
+
+void
+DRI2BlockClient(ClientPtr client, DrawablePtr pDraw)
+{
+    DRI2DrawablePtr pPriv;
+
+    pPriv = DRI2GetDrawable(pDraw);
+    if (pPriv == NULL)
+	return;
+
+    if (pPriv->blockedClient == NULL) {
+	IgnoreClient(client);
+	pPriv->blockedClient = client;
+    }
+}
+
 int
 DRI2CopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
 	       unsigned int dest, unsigned int src)
@@ -338,6 +405,324 @@ DRI2CopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
     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;
+}
+
+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.  Either wake up an SBC waiter or a client that was
+     * blocked due to GLX activity during a swap.
+     */
+    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) {
+	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;
+
+    pPriv = DRI2GetDrawable(pDraw);
+    if (pPriv == NULL) {
+        xf86DrvMsg(pScreen->myNum, X_ERROR,
+		   "[DRI2] %s: bad drawable\n", __func__);
+	return;
+    }
+
+    if (pPriv->refCount == 0) {
+        xf86DrvMsg(pScreen->myNum, X_ERROR,
+		   "[DRI2] %s: bad drawable refcount\n", __func__);
+	xfree(pPriv);
+	return;
+    }
+
+    ust = ((CARD64)tv_sec * 1000000) + tv_usec;
+    if (swap_complete)
+	swap_complete(client, swap_data, type, ust, frame, pPriv->swap_count);
+
+    pPriv->swapsPending--;
+    pPriv->swap_count++;
+
+    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, pDrawable);
+	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;
+    CARD64          ust;
+    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, just blit */
+    if (!ds->ScheduleSwap) {
+	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 the last swap target hasn't been set yet, call into the driver
+     * to get the current count.
+     */
+    if (target_msc == 0 && divisor == 0 && remainder == 0 &&
+	pPriv->last_swap_target < 0) {
+	ret = (*ds->GetMSC)(pDraw, &ust, &target_msc);
+	if (!ret) {
+	    xf86DrvMsg(pScreen->myNum, X_ERROR,
+		       "[DRI2] %s: driver failed to return current MSC\n",
+		       __func__);
+	    return BadDrawable;
+	}
+    }
+
+    /* First swap needs to initialize last_swap_target */
+    if (pPriv->last_swap_target < 0)
+	pPriv->last_swap_target = target_msc;
+
+    /*
+     * 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;
+
+    ret = (*ds->ScheduleSwap)(client, pDraw, pDestBuffer, pSrcBuffer,
+			      swap_target, divisor, remainder, func, data);
+    if (!ret) {
+        xf86DrvMsg(pScreen->myNum, X_ERROR,
+		   "[DRI2] %s: driver failed to schedule swap\n", __func__);
+	return BadDrawable;
+    }
+
+    pPriv->swapsPending++;
+    pPriv->last_swap_target = *swap_target;
+
+    return Success;
+}
+
+void
+DRI2SwapInterval(DrawablePtr pDrawable, int interval)
+{
+    DRI2DrawablePtr pPriv = DRI2GetDrawable(pDrawable);
+
+    /* 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;
+
+    if (pPriv->swap_count >= target_sbc)
+	return Success;
+
+    pPriv->target_sbc = target_sbc;
+    DRI2BlockClient(client, pDraw);
+
+    return Success;
+}
+
 void
 DRI2DestroyDrawable(DrawablePtr pDraw)
 {
@@ -363,7 +748,11 @@ DRI2DestroyDrawable(DrawablePtr pDraw)
 	xfree(pPriv->buffers);
     }
 
-    xfree(pPriv);
+    /* If the window is destroyed while we have a swap pending, don't
+     * actually free the priv yet.  We'll need it in the DRI2SwapComplete()
+     * callback and we'll free it there once we're done. */
+    if (!pPriv->swapsPending)
+	xfree(pPriv);
 
     if (pDraw->type == DRAWABLE_WINDOW)
     {
@@ -421,7 +810,7 @@ DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
         return FALSE;
     }
 
-    ds = xalloc(sizeof *ds);
+    ds = xcalloc(1, sizeof *ds);
     if (!ds)
 	return FALSE;
 
@@ -433,6 +822,12 @@ DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
     ds->DestroyBuffer  = info->DestroyBuffer;
     ds->CopyRegion     = info->CopyRegion;
 
+    if (info->version >= 4) {
+	ds->ScheduleSwap = info->ScheduleSwap;
+	ds->ScheduleWaitMSC = info->ScheduleWaitMSC;
+	ds->GetMSC = info->GetMSC;
+    }
+
     dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, ds);
 
     xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2] Setup complete\n");
diff --git a/xorg-server/hw/xfree86/dri2/dri2.h b/xorg-server/hw/xfree86/dri2/dri2.h
index 175471aae..dd59297df 100644
--- a/xorg-server/hw/xfree86/dri2/dri2.h
+++ b/xorg-server/hw/xfree86/dri2/dri2.h
@@ -47,6 +47,9 @@ typedef struct {
 } DRI2BufferRec, *DRI2BufferPtr;
 
 typedef DRI2BufferRec DRI2Buffer2Rec, *DRI2Buffer2Ptr;
+typedef void (*DRI2SwapEventPtr)(ClientPtr client, void *data, int type,
+				 CARD64 ust, CARD64 msc, CARD64 sbc);
+
 
 typedef DRI2BufferPtr	(*DRI2CreateBuffersProcPtr)(DrawablePtr pDraw,
 						    unsigned int *attachments,
@@ -58,20 +61,98 @@ typedef void		(*DRI2CopyRegionProcPtr)(DrawablePtr pDraw,
 						 RegionPtr pRegion,
 						 DRI2BufferPtr pDestBuffer,
 						 DRI2BufferPtr pSrcBuffer);
-
 typedef void		(*DRI2WaitProcPtr)(WindowPtr pWin,
 					   unsigned int sequence);
-
+/**
+ * Schedule a buffer swap
+ *
+ * This callback is used to support glXSwapBuffers and the OML_sync_control
+ * extension (see it for a description of the params).
+ *
+ * Drivers should queue an event for the frame count that satisfies the
+ * parameters passed in.  If the event is in the future (i.e. the conditions
+ * aren't currently satisfied), the server may block the client at the next
+ * GLX request using DRI2WaitSwap. When the event arrives, drivers should call
+ * \c DRI2SwapComplete, which will handle waking the client and returning
+ * the appropriate data.
+ *
+ * The DDX is responsible for doing a flip, exchange, or blit of the swap
+ * when the corresponding event arrives.  The \c DRI2CanFlip and
+ * \c DRI2CanExchange functions can be used as helpers for this purpose.
+ *
+ * \param client client pointer (used for block/unblock)
+ * \param pDraw drawable whose count we want
+ * \param pDestBuffer current front buffer
+ * \param pSrcBuffer current back buffer
+ * \param target_msc frame count to wait for
+ * \param divisor divisor for condition equation
+ * \param remainder remainder for division equation
+ * \param func function to call when the swap completes
+ * \param data data for the callback \p func.
+ */
+typedef int		(*DRI2ScheduleSwapProcPtr)(ClientPtr client,
+						   DrawablePtr pDraw,
+						   DRI2BufferPtr pDestBuffer,
+						   DRI2BufferPtr pSrcBuffer,
+						   CARD64 *target_msc,
+						   CARD64 divisor,
+						   CARD64 remainder,
+						   DRI2SwapEventPtr func,
+						   void *data);
 typedef DRI2BufferPtr	(*DRI2CreateBufferProcPtr)(DrawablePtr pDraw,
 						   unsigned int attachment,
 						   unsigned int format);
 typedef void		(*DRI2DestroyBufferProcPtr)(DrawablePtr pDraw,
 						    DRI2BufferPtr buffer);
-
+/**
+ * Get current media stamp counter values
+ *
+ * This callback is used to support the SGI_video_sync and OML_sync_control
+ * extensions.
+ *
+ * Drivers should return the current frame counter and the timestamp from
+ * when the returned frame count was last incremented.
+ *
+ * The count should correspond to the screen where the drawable is currently
+ * visible.  If the drawable isn't visible (e.g. redirected), the server
+ * should return BadDrawable to the client, pending GLX spec updates to
+ * define this behavior.
+ *
+ * \param pDraw drawable whose count we want
+ * \param ust timestamp from when the count was last incremented.
+ * \param mst current frame count
+ */
+typedef int		(*DRI2GetMSCProcPtr)(DrawablePtr pDraw, CARD64 *ust,
+					     CARD64 *msc);
+/**
+ * Schedule a frame count related wait
+ *
+ * This callback is used to support the SGI_video_sync and OML_sync_control
+ * extensions.  See those specifications for details on how to handle
+ * the divisor and remainder parameters.
+ *
+ * Drivers should queue an event for the frame count that satisfies the
+ * parameters passed in.  If the event is in the future (i.e. the conditions
+ * aren't currently satisfied), the driver should block the client using
+ * \c DRI2BlockClient.  When the event arrives, drivers should call
+ * \c DRI2WaitMSCComplete, which will handle waking the client and returning
+ * the appropriate data.
+ *
+ * \param client client pointer (used for block/unblock)
+ * \param pDraw drawable whose count we want
+ * \param target_msc frame count to wait for
+ * \param divisor divisor for condition equation
+ * \param remainder remainder for division equation
+ */
+typedef int		(*DRI2ScheduleWaitMSCProcPtr)(ClientPtr client,
+						      DrawablePtr pDraw,
+						      CARD64 target_msc,
+						      CARD64 divisor,
+						      CARD64 remainder);
 /**
  * Version of the DRI2InfoRec structure defined in this header
  */
-#define DRI2INFOREC_VERSION 3
+#define DRI2INFOREC_VERSION 4
 
 typedef struct {
     unsigned int version;	/**< Version of this struct */
@@ -83,9 +164,13 @@ typedef struct {
     DRI2DestroyBufferProcPtr	DestroyBuffer;
     DRI2CopyRegionProcPtr	CopyRegion;
     DRI2WaitProcPtr		Wait;
-
+    DRI2ScheduleSwapProcPtr	ScheduleSwap;
+    DRI2GetMSCProcPtr		GetMSC;
+    DRI2ScheduleWaitMSCProcPtr	ScheduleWaitMSC;
 }  DRI2InfoRec, *DRI2InfoPtr;
 
+extern _X_EXPORT int DRI2EventBase;
+
 extern _X_EXPORT Bool DRI2ScreenInit(ScreenPtr	pScreen,
 		    DRI2InfoPtr info);
 
@@ -137,4 +222,38 @@ extern _X_EXPORT DRI2BufferPtr *DRI2GetBuffersWithFormat(DrawablePtr pDraw,
 	int *width, int *height, unsigned int *attachments, int count,
 	int *out_count);
 
+extern _X_EXPORT void DRI2SwapInterval(DrawablePtr pDrawable, int interval);
+extern _X_EXPORT int DRI2SwapBuffers(ClientPtr client, DrawablePtr pDrawable,
+				     CARD64 target_msc, CARD64 divisor,
+				     CARD64 remainder, CARD64 *swap_target,
+				     DRI2SwapEventPtr func, void *data);
+extern _X_EXPORT Bool DRI2WaitSwap(ClientPtr client, DrawablePtr pDrawable);
+
+extern _X_EXPORT int DRI2GetMSC(DrawablePtr pDrawable, CARD64 *ust,
+				CARD64 *msc, CARD64 *sbc);
+extern _X_EXPORT int DRI2WaitMSC(ClientPtr client, DrawablePtr pDrawable,
+				 CARD64 target_msc, CARD64 divisor,
+				 CARD64 remainder);
+extern _X_EXPORT int ProcDRI2WaitMSCReply(ClientPtr client, CARD64 ust,
+					  CARD64 msc, CARD64 sbc);
+extern _X_EXPORT int DRI2WaitSBC(ClientPtr client, DrawablePtr pDraw,
+				 CARD64 target_sbc, CARD64 *ust, CARD64 *msc,
+				 CARD64 *sbc);
+extern _X_EXPORT Bool DRI2ThrottleClient(ClientPtr client, DrawablePtr pDraw);
+
+extern _X_EXPORT Bool DRI2CanFlip(DrawablePtr pDraw);
+
+extern _X_EXPORT Bool DRI2CanExchange(DrawablePtr pDraw);
+
+extern _X_EXPORT void DRI2BlockClient(ClientPtr client, DrawablePtr pDraw);
+
+extern _X_EXPORT void DRI2SwapComplete(ClientPtr client, DrawablePtr pDraw,
+				       int frame, unsigned int tv_sec,
+				       unsigned int tv_usec, int type,
+				       DRI2SwapEventPtr swap_complete,
+				       void *swap_data);
+extern _X_EXPORT void DRI2WaitMSCComplete(ClientPtr client, DrawablePtr pDraw,
+					  int frame, unsigned int tv_sec,
+					  unsigned int tv_usec);
+
 #endif
diff --git a/xorg-server/hw/xfree86/dri2/dri2ext.c b/xorg-server/hw/xfree86/dri2/dri2ext.c
index 7d6064acb..3e6b03e4e 100644
--- a/xorg-server/hw/xfree86/dri2/dri2ext.c
+++ b/xorg-server/hw/xfree86/dri2/dri2ext.c
@@ -259,6 +259,9 @@ ProcDRI2GetBuffers(ClientPtr client)
 		       &pDrawable, &status))
 	return status;
 
+    if (DRI2ThrottleClient(client, pDrawable))
+	return client->noClientException;
+
     attachments = (unsigned int *) &stuff[1];
     buffers = DRI2GetBuffers(pDrawable, &width, &height,
 			     attachments, stuff->count, &count);
@@ -283,6 +286,9 @@ ProcDRI2GetBuffersWithFormat(ClientPtr client)
 		       &pDrawable, &status))
 	return status;
 
+    if (DRI2ThrottleClient(client, pDrawable))
+	return client->noClientException;
+
     attachments = (unsigned int *) &stuff[1];
     buffers = DRI2GetBuffersWithFormat(pDrawable, &width, &height,
 				       attachments, stuff->count, &count);
@@ -329,6 +335,204 @@ ProcDRI2CopyRegion(ClientPtr client)
     return client->noClientException;
 }
 
+static void
+load_swap_reply(xDRI2SwapBuffersReply *rep, CARD64 sbc)
+{
+    rep->swap_hi = sbc >> 32;
+    rep->swap_lo = sbc & 0xffffffff;
+}
+
+static CARD64
+vals_to_card64(CARD32 lo, CARD32 hi)
+{
+    return (CARD64)hi << 32 | lo;
+}
+
+static void
+DRI2SwapEvent(ClientPtr client, void *data, int type, CARD64 ust, CARD64 msc,
+	      CARD64 sbc)
+{
+    xDRI2BufferSwapComplete event;
+
+    event.type = DRI2EventBase + DRI2_BufferSwapComplete;
+    event.sequenceNumber = client->sequence;
+    event.event_type = type;
+    event.ust_hi = (CARD64)ust >> 32;
+    event.ust_lo = ust & 0xffffffff;
+    event.msc_hi = (CARD64)msc >> 32;
+    event.msc_lo = msc & 0xffffffff;
+    event.sbc_hi = (CARD64)sbc >> 32;
+    event.sbc_lo = sbc & 0xffffffff;
+
+    WriteEventsToClient(client, 1, (xEvent *)&event);
+}
+
+static int
+ProcDRI2SwapBuffers(ClientPtr client)
+{
+    REQUEST(xDRI2SwapBuffersReq);
+    xDRI2SwapBuffersReply rep;
+    DrawablePtr pDrawable;
+    CARD64 target_msc, divisor, remainder, swap_target;
+    int status;
+
+    REQUEST_SIZE_MATCH(xDRI2SwapBuffersReq);
+
+    if (!validDrawable(client, stuff->drawable,
+		       DixReadAccess | DixWriteAccess, &pDrawable, &status))
+	return status;
+
+    target_msc = vals_to_card64(stuff->target_msc_lo, stuff->target_msc_hi);
+    divisor = vals_to_card64(stuff->divisor_lo, stuff->divisor_hi);
+    remainder = vals_to_card64(stuff->remainder_lo, stuff->remainder_hi);
+
+    status = DRI2SwapBuffers(client, pDrawable, target_msc, divisor, remainder,
+			     &swap_target, DRI2SwapEvent, pDrawable);
+    if (status != Success)
+	return BadDrawable;
+
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    load_swap_reply(&rep, swap_target);
+
+    WriteToClient(client, sizeof(xDRI2SwapBuffersReply), &rep);
+
+    return client->noClientException;
+}
+
+static void
+load_msc_reply(xDRI2MSCReply *rep, CARD64 ust, CARD64 msc, CARD64 sbc)
+{
+    rep->ust_hi = ust >> 32;
+    rep->ust_lo = ust & 0xffffffff;
+    rep->msc_hi = msc >> 32;
+    rep->msc_lo = msc & 0xffffffff;
+    rep->sbc_hi = sbc >> 32;
+    rep->sbc_lo = sbc & 0xffffffff;
+}
+
+static int
+ProcDRI2GetMSC(ClientPtr client)
+{
+    REQUEST(xDRI2GetMSCReq);
+    xDRI2MSCReply rep;
+    DrawablePtr pDrawable;
+    CARD64 ust, msc, sbc;
+    int status;
+
+    REQUEST_SIZE_MATCH(xDRI2GetMSCReq);
+
+    if (!validDrawable(client, stuff->drawable, DixReadAccess, &pDrawable,
+		       &status))
+	return status;
+
+    status = DRI2GetMSC(pDrawable, &ust, &msc, &sbc);
+    if (status != Success)
+	return status;
+
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    load_msc_reply(&rep, ust, msc, sbc);
+
+    WriteToClient(client, sizeof(xDRI2MSCReply), &rep);
+
+    return client->noClientException;
+}
+
+static int
+ProcDRI2WaitMSC(ClientPtr client)
+{
+    REQUEST(xDRI2WaitMSCReq);
+    DrawablePtr pDrawable;
+    CARD64 target, divisor, remainder;
+    int status;
+
+    /* FIXME: in restart case, client may be gone at this point */
+
+    REQUEST_SIZE_MATCH(xDRI2WaitMSCReq);
+
+    if (!validDrawable(client, stuff->drawable, DixReadAccess, &pDrawable,
+		       &status))
+	return status;
+
+    target = vals_to_card64(stuff->target_msc_lo, stuff->target_msc_hi);
+    divisor = vals_to_card64(stuff->divisor_lo, stuff->divisor_hi);
+    remainder = vals_to_card64(stuff->remainder_lo, stuff->remainder_hi);
+
+    status = DRI2WaitMSC(client, pDrawable, target, divisor, remainder);
+    if (status != Success)
+	return status;
+
+    return client->noClientException;
+}
+
+int
+ProcDRI2WaitMSCReply(ClientPtr client, CARD64 ust, CARD64 msc, CARD64 sbc)
+{
+    xDRI2MSCReply rep;
+
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    load_msc_reply(&rep, ust, msc, sbc);
+
+    WriteToClient(client, sizeof(xDRI2MSCReply), &rep);
+
+    return client->noClientException;
+}
+
+static int
+ProcDRI2SwapInterval(ClientPtr client)
+{
+    REQUEST(xDRI2SwapIntervalReq);
+    DrawablePtr pDrawable;
+    int status;
+
+    /* FIXME: in restart case, client may be gone at this point */
+
+    REQUEST_SIZE_MATCH(xDRI2SwapIntervalReq);
+
+    if (!validDrawable(client, stuff->drawable, DixReadAccess | DixWriteAccess,
+		       &pDrawable, &status))
+	return status;
+
+    DRI2SwapInterval(pDrawable, stuff->interval);
+
+    return client->noClientException;
+}
+
+static int
+ProcDRI2WaitSBC(ClientPtr client)
+{
+    REQUEST(xDRI2WaitSBCReq);
+    xDRI2MSCReply rep;
+    DrawablePtr pDrawable;
+    CARD64 target, ust, msc, sbc;
+    int status;
+
+    REQUEST_SIZE_MATCH(xDRI2WaitSBCReq);
+
+    if (!validDrawable(client, stuff->drawable, DixReadAccess, &pDrawable,
+		       &status))
+	return status;
+
+    target = vals_to_card64(stuff->target_sbc_lo, stuff->target_sbc_hi);
+    status = DRI2WaitSBC(client, pDrawable, target, &ust, &msc, &sbc);
+    if (status != Success)
+	return status;
+
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    load_msc_reply(&rep, ust, msc, sbc);
+
+    WriteToClient(client, sizeof(xDRI2MSCReply), &rep);
+
+    return client->noClientException;
+}
+
 static int
 ProcDRI2Dispatch (ClientPtr client)
 {
@@ -357,6 +561,16 @@ ProcDRI2Dispatch (ClientPtr client)
 	return ProcDRI2CopyRegion(client);
     case X_DRI2GetBuffersWithFormat:
 	return ProcDRI2GetBuffersWithFormat(client);
+    case X_DRI2SwapBuffers:
+	return ProcDRI2SwapBuffers(client);
+    case X_DRI2GetMSC:
+	return ProcDRI2GetMSC(client);
+    case X_DRI2WaitMSC:
+	return ProcDRI2WaitMSC(client);
+    case X_DRI2WaitSBC:
+	return ProcDRI2WaitSBC(client);
+    case X_DRI2SwapInterval:
+	return ProcDRI2SwapInterval(client);
     default:
 	return BadRequest;
     }
@@ -413,6 +627,8 @@ static int DRI2DrawableGone(pointer p, XID id)
     return Success;
 }
 
+int DRI2EventBase;
+
 static void
 DRI2ExtensionInit(void)
 {
@@ -429,6 +645,7 @@ DRI2ExtensionInit(void)
 				 NULL,
 				 StandardMinorOpcode);
 
+    DRI2EventBase = dri2Extension->eventBase;
 }
 
 extern Bool noDRI2Extension;