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>
2026-04-14 17:18:09 +00:00 · 2010-06-28 16:10:13 -07:00
parent af0f9f9133
commit 1c4a0db2c6
7 changed files with 243 additions and 3 deletions
--- 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;
+}