Add fence sync driver interface

-Add fence sync objects

-Add fence sync devPrivates

-Add a X sync module screen private

-Add wrappable functions to create and destroy
 fence sync objects

-Give fence sync objects wrappable functions to
 trigger, test, and reset their 'triggered' value.

-Give fence sync objects wrappable functions to
 notify driver when adding/removing triggers to/
 from the sync object.

Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Keith Packard <keithp@keithp.com>

3 files changed, 233 insertions, 2 deletions

diff --git a/miext/sync/misync.c b/miext/sync/misync.c
index 344810f56..bcc68a2bb 100644
--- a/miext/sync/misync.c
+++ b/miext/sync/misync.c
@@ -21,5 +21,181 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "scrnintstr.h"
 #include "misync.h"
 #include "misyncstr.h"
+
+static DevPrivateKeyRec syncScreenPrivateKeyRec;
+static DevPrivateKey syncScreenPrivateKey = &syncScreenPrivateKeyRec;
+
+#define SYNC_SCREEN_PRIV(pScreen) 				\
+    (SyncScreenPrivPtr) dixLookupPrivate(&pScreen->devPrivates,	\
+					 syncScreenPrivateKey)
+
+typedef struct _syncScreenPriv {
+    /* Wrappable sync-specific screen functions */
+    SyncScreenFuncsRec		funcs;
+
+    /* Wrapped screen functions */
+    CloseScreenProcPtr		CloseScreen;
+} SyncScreenPrivRec, *SyncScreenPrivPtr;
+
+/* Default implementations of the sync screen functions */
+void
+miSyncScreenCreateFence(ScreenPtr pScreen, SyncFence* pFence,
+                        Bool initially_triggered)
+{
+    (void)pScreen;
+
+    pFence->triggered = initially_triggered;
+}
+
+void miSyncScreenDestroyFence(ScreenPtr pScreen, SyncFence* pFence)
+{
+    (void)pScreen;
+    (void)pFence;
+}
+
+/* Default implementations of the per-object functions */
+static void
+miSyncFenceSetTriggered(SyncFence* pFence)
+{
+    pFence->triggered = TRUE;
+}
+
+static void
+miSyncFenceReset(SyncFence* pFence)
+{
+    pFence->triggered = FALSE;
+}
+
+static Bool
+miSyncFenceCheckTriggered(SyncFence* pFence)
+{
+    return pFence->triggered;
+}
+
+static void
+miSyncFenceAddTrigger(SyncTrigger* pTrigger)
+{
+    (void)pTrigger;
+
+    return;
+}
+
+static void
+miSyncFenceDeleteTrigger(SyncTrigger* pTrigger)
+{
+    (void)pTrigger;
+
+    return;
+}
+
+/* Machine independent portion of the fence sync object implementation */
+void
+miSyncInitFence(ScreenPtr pScreen, SyncFence* pFence, Bool initially_triggered)
+{
+    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+    static const SyncFenceFuncsRec miSyncFenceFuncs = {
+	&miSyncFenceSetTriggered,
+	&miSyncFenceReset,
+	&miSyncFenceCheckTriggered,
+	&miSyncFenceAddTrigger,
+	&miSyncFenceDeleteTrigger
+    };
+
+    pFence->pScreen = pScreen;
+    pFence->funcs = miSyncFenceFuncs;
+
+    pScreenPriv->funcs.CreateFence(pScreen, pFence, initially_triggered);
+}
+
+void
+miSyncDestroyFence(SyncFence* pFence)
+{
+    ScreenPtr pScreen = pFence->pScreen;
+    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+    SyncTriggerList *ptl, *pNext;
+
+    pFence->sync.beingDestroyed = TRUE;
+    /* tell all the fence's triggers that the counter has been destroyed */
+    for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext)
+    {
+	(*ptl->pTrigger->CounterDestroyed)(ptl->pTrigger);
+	pNext = ptl->next;
+	free(ptl); /* destroy the trigger list as we go */
+    }
+
+    pScreenPriv->funcs.DestroyFence(pScreen, pFence);
+
+    dixFreeObjectWithPrivates(pFence, PRIVATE_SYNC_FENCE);
+}
+
+void
+miSyncTriggerFence(SyncFence* pFence)
+{
+    SyncTriggerList *ptl, *pNext;
+    CARD64 unused;
+
+    pFence->funcs.SetTriggered(pFence);
+
+    XSyncIntToValue(&unused, 0L);
+
+    /* run through triggers to see if any fired */
+    for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext)
+    {
+	pNext = ptl->next;
+	if ((*ptl->pTrigger->CheckTrigger)(ptl->pTrigger, unused))
+	    (*ptl->pTrigger->TriggerFired)(ptl->pTrigger);
+    }
+}
+
+SyncScreenFuncsPtr miSyncGetScreenFuncs(ScreenPtr pScreen)
+{
+    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+
+    return &pScreenPriv->funcs;
+}
+
+static Bool
+SyncCloseScreen (int i, ScreenPtr pScreen)
+{
+    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+
+    pScreen->CloseScreen = pScreenPriv->CloseScreen;
+    free(pScreenPriv);
+
+    return (*pScreen->CloseScreen) (i, pScreen);
+}
+
+Bool
+miSyncSetup(ScreenPtr pScreen)
+{
+    SyncScreenPrivPtr	pScreenPriv;
+
+    static const SyncScreenFuncsRec miSyncScreenFuncs = {
+	&miSyncScreenCreateFence,
+	&miSyncScreenDestroyFence
+    };
+
+    if (dixPrivateKeyRegistered(syncScreenPrivateKey))
+	return TRUE;
+
+    if (!dixRegisterPrivateKey(syncScreenPrivateKey, PRIVATE_SCREEN,
+			       sizeof(SyncScreenPrivRec)))
+	return FALSE;
+
+    pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+
+    pScreenPriv->funcs = miSyncScreenFuncs;
+
+    /* Wrap CloseScreen to clean up */
+    pScreenPriv->CloseScreen = pScreen->CloseScreen;
+    pScreen->CloseScreen = SyncCloseScreen;
+
+    return TRUE;
+}
diff --git a/miext/sync/misync.h b/miext/sync/misync.h
index c66be8d82..1c82ea516 100644
--- a/miext/sync/misync.h
+++ b/miext/sync/misync.h
@@ -28,4 +28,50 @@
 #ifndef _MISYNC_H_
 #define _MISYNC_H_
 
+typedef struct _SyncFence SyncFence;
+typedef struct _SyncTrigger SyncTrigger;
+
+typedef void (*SyncScreenCreateFenceFunc) (ScreenPtr pScreen,
+					   SyncFence* pFence,
+					   Bool initially_triggered);
+typedef void (*SyncScreenDestroyFenceFunc) (ScreenPtr pScreen,
+					    SyncFence* pFence);
+
+typedef struct _syncScreenFuncs {
+    SyncScreenCreateFenceFunc	CreateFence;
+    SyncScreenDestroyFenceFunc	DestroyFence;
+} SyncScreenFuncsRec, *SyncScreenFuncsPtr;
+
+extern _X_EXPORT void
+miSyncScreenCreateFence(ScreenPtr pScreen, SyncFence* pFence,
+			Bool initially_triggered);
+extern _X_EXPORT void
+miSyncScreenDestroyFence(ScreenPtr pScreen, SyncFence* pFence);
+
+typedef void (*SyncFenceSetTriggeredFunc) (SyncFence* pFence);
+typedef void (*SyncFenceResetFunc) (SyncFence* pFence);
+typedef Bool (*SyncFenceCheckTriggeredFunc) (SyncFence* pFence);
+typedef void (*SyncFenceAddTriggerFunc) (SyncTrigger* pTrigger);
+typedef void (*SyncFenceDeleteTriggerFunc) (SyncTrigger* pTrigger);
+
+typedef struct _syncFenceFuncs {
+    SyncFenceSetTriggeredFunc	SetTriggered;
+    SyncFenceResetFunc		Reset;
+    SyncFenceCheckTriggeredFunc	CheckTriggered;
+    SyncFenceAddTriggerFunc	AddTrigger;
+    SyncFenceDeleteTriggerFunc	DeleteTrigger;
+} SyncFenceFuncsRec, *SyncFenceFuncsPtr;
+
+extern _X_EXPORT void
+miSyncInitFence(ScreenPtr pScreen, SyncFence* pFence, Bool initially_triggered);
+extern _X_EXPORT void
+miSyncDestroyFence(SyncFence* pFence);
+extern _X_EXPORT void
+miSyncTriggerFence(SyncFence* pFence);
+
+extern _X_EXPORT SyncScreenFuncsPtr
+miSyncGetScreenFuncs(ScreenPtr pScreen);
+extern _X_EXPORT Bool
+miSyncSetup(ScreenPtr pScreen);
+
 #endif /* _MISYNC_H_ */
diff --git a/miext/sync/misyncstr.h b/miext/sync/misyncstr.h
index eecf04f00..40a865c9c 100644
--- a/miext/sync/misyncstr.h
+++ b/miext/sync/misyncstr.h
@@ -35,6 +35,7 @@
 
 /* Sync object types */
 #define SYNC_COUNTER		0
+#define SYNC_FENCE		1
 
 typedef struct _SyncObject {
     ClientPtr		client;	/* Owning client. 0 for system counters */
@@ -50,7 +51,15 @@ typedef struct _SyncCounter {
     struct _SysCounterInfo *pSysCounterInfo; /* NULL if not a system counter */
 } SyncCounter;
 
-typedef struct _SyncTrigger {
+struct _SyncFence {
+    SyncObject		sync;		/* Common sync object data */
+    ScreenPtr		pScreen;	/* Screen of this fence object */
+    SyncFenceFuncsRec	funcs;		/* Funcs for performing ops on fence */
+    Bool		triggered;	/* fence state */
+    PrivateRec		*devPrivates;	/* driver-specific per-fence data */
+};
+
+struct _SyncTrigger {
     SyncObject *pSync;
     CARD64	wait_value;	/* wait value */
     unsigned int value_type;	/* Absolute or Relative */
@@ -66,7 +75,7 @@ typedef struct _SyncTrigger {
     void	(*CounterDestroyed)(
 				struct _SyncTrigger * /*pTrigger*/
 				    );
-} SyncTrigger;
+};
 
 typedef struct _SyncTriggerList {
     SyncTrigger *pTrigger;