Create/Destroy/Trigger/Reset/Query Fence Sync objs

Initial server side implementation of fence sync
objects.  Allows creation, management, and state
queries of binary state objects.  Currently they
are not very useful as there is no way to wait for
them efficiently.

The basic trigger operation added here triggers
relative to a given X screen's rendering operations.
To perform this operation, fence sync objects must
be tied to a screen.  As Aaron Plattner pointed out,
screens are identified but a drawable in X protocol,
so a drawable argument is included in
XSyncCreateFence().  The screen also could have been
specified as part of the trigger operation.  However,
it is also desireable to associate a screen with
fence sync objects at creation time so that the
associated screen's driver can allocate any HW-
specific resources needed by the fence object up
front.

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

1 files changed, 223 insertions, 4 deletions

diff --git a/Xext/sync.c b/Xext/sync.c
index 2615c27eb..1e8dadf68 100644
--- a/Xext/sync.c
+++ b/Xext/sync.c
@@ -63,10 +63,12 @@ PERFORMANCE OF THIS SOFTWARE.
 #include "os.h"
 #include "extnsionst.h"
 #include "dixstruct.h"
+#include "pixmapstr.h"
 #include "resource.h"
 #include "opaque.h"
 #include <X11/extensions/syncproto.h>
 #include "syncsrv.h"
+#include "syncsdk.h"
 #include "protocol-versions.h"
 
 #include <stdio.h>
@@ -85,6 +87,7 @@ static RESTYPE  RTCounter = 0;
 static RESTYPE  RTAwait;
 static RESTYPE  RTAlarm;
 static RESTYPE  RTAlarmClient;
+static RESTYPE  RTFence;
 static int SyncNumSystemCounters = 0;
 static SyncCounter **SysCounterList = NULL;
 
@@ -850,23 +853,34 @@ SyncCreate(ClientPtr client, XID id, unsigned char type)
 {
     SyncObject *pSync;
     RESTYPE resType;
-    unsigned long syncSize;
 
     switch (type) {
     case SYNC_COUNTER:
 	resType = RTCounter;
-	syncSize = sizeof(SyncCounter);
+	pSync = malloc(sizeof(SyncCounter));
+	break;
+    case SYNC_FENCE:
+	resType = RTFence;
+	pSync = dixAllocateObjectWithPrivates(SyncFence,
+					      PRIVATE_SYNC_FENCE);
 	break;
     default:
 	return NULL;
     }
 
-    if (!(pSync = (SyncObject *)malloc(syncSize)))
+    if (!pSync)
 	return NULL;
 
     if (!AddResource(id, resType, (pointer) pSync))
     {
-	free(pSync);
+	switch (type) {
+	case SYNC_FENCE:
+	    dixFreeObjectWithPrivates((SyncFence *)pSync, PRIVATE_SYNC_FENCE);
+	    break;
+	default:
+	    free(pSync);
+	}
+
 	return NULL;
     }
 
@@ -1866,6 +1880,145 @@ ProcSyncDestroyAlarm(ClientPtr client)
     return Success;
 }
 
+static int
+ProcSyncCreateFence(ClientPtr client)
+{
+    REQUEST(xSyncCreateFenceReq);
+    DrawablePtr pDraw;
+    SyncFence *pFence;
+    int rc;
+
+    REQUEST_SIZE_MATCH(xSyncCreateFenceReq);
+
+    rc = dixLookupDrawable(&pDraw, stuff->d, client, M_ANY, DixGetAttrAccess);
+    if (rc != Success)
+	return rc;
+
+    LEGAL_NEW_RESOURCE(stuff->fid, client);
+
+    if (!(pFence = (SyncFence *)SyncCreate(client,
+					   stuff->fid,
+					   SYNC_FENCE)))
+	return BadAlloc;
+
+    miSyncInitFence(pDraw->pScreen, pFence, stuff->initially_triggered);
+
+    return client->noClientException;
+}
+
+static int
+FreeFence(void *obj, XID id)
+{
+    SyncFence *pFence = (SyncFence *) obj;
+
+    miSyncDestroyFence(pFence);
+
+    return Success;
+}
+
+int SyncVerifyFence(SyncFence **ppSyncFence, XID fid,
+		    ClientPtr client, Mask mode)
+{
+    int rc = dixLookupResourceByType((pointer *)ppSyncFence, fid, RTFence,
+				     client, mode);
+
+    if (rc != Success)
+	client->errorValue = fid;
+
+    return rc;
+}
+
+static int
+ProcSyncTriggerFence(ClientPtr client)
+{
+    REQUEST(xSyncTriggerFenceReq);
+    SyncFence *pFence;
+    int rc;
+
+    REQUEST_SIZE_MATCH(xSyncTriggerFenceReq);
+
+    rc = dixLookupResourceByType((pointer *)&pFence, stuff->fid, RTFence,
+				 client, DixWriteAccess);
+    if (rc != Success)
+	return rc;
+
+    miSyncTriggerFence(pFence);
+
+    return client->noClientException;
+}
+
+static int
+ProcSyncResetFence(ClientPtr client)
+{
+    REQUEST(xSyncResetFenceReq);
+    SyncFence *pFence;
+    int rc;
+
+    REQUEST_SIZE_MATCH(xSyncResetFenceReq);
+
+    rc = dixLookupResourceByType((pointer *)&pFence, stuff->fid, RTFence,
+				 client, DixWriteAccess);
+    if (rc != Success)
+	return rc;
+
+    if (pFence->funcs.CheckTriggered(pFence) != TRUE)
+	return BadMatch;
+
+    pFence->funcs.Reset(pFence);
+
+    return client->noClientException;
+}
+
+static int
+ProcSyncDestroyFence(ClientPtr client)
+{
+    REQUEST(xSyncDestroyFenceReq);
+    SyncFence *pFence;
+    int rc;
+
+    REQUEST_SIZE_MATCH(xSyncDestroyFenceReq);
+
+    rc = dixLookupResourceByType((pointer *)&pFence, stuff->fid, RTFence,
+				 client, DixDestroyAccess);
+    if (rc != Success)
+	return rc;
+
+    FreeResource(stuff->fid, RT_NONE);
+    return client->noClientException;
+}
+
+static int
+ProcSyncQueryFence(ClientPtr client)
+{
+    REQUEST(xSyncQueryFenceReq);
+    xSyncQueryFenceReply rep;
+    SyncFence *pFence;
+    int rc;
+
+    REQUEST_SIZE_MATCH(xSyncQueryFenceReq);
+
+    rc = dixLookupResourceByType((pointer *)&pFence, stuff->fid,
+				 RTFence, client, DixReadAccess);
+    if (rc != Success)
+	return rc;
+
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+
+    rep.triggered = pFence->funcs.CheckTriggered(pFence);
+
+    if (client->swapped)
+    {
+	char n;
+	swaps(&rep.sequenceNumber, n);
+	swapl(&rep.length, n);
+    }
+
+    WriteToClient(client, sizeof(xSyncQueryFenceReply), (char *) &rep);
+    return client->noClientException;
+}
+
 /*
  * ** Given an extension request, call the appropriate request procedure
  */
@@ -2103,6 +2256,70 @@ SProcSyncGetPriority(ClientPtr client)
     return ProcSyncGetPriority(client);
 }
 
+static int
+SProcSyncCreateFence(ClientPtr client)
+{
+    REQUEST(xSyncCreateFenceReq);
+    char n;
+
+    swaps(&stuff->length, n);
+    REQUEST_SIZE_MATCH (xSyncCreateFenceReq);
+    swapl(&stuff->fid, n);
+
+    return ProcSyncCreateFence(client);
+}
+
+static int
+SProcSyncTriggerFence(ClientPtr client)
+{
+    REQUEST(xSyncTriggerFenceReq);
+    char n;
+
+    swaps(&stuff->length, n);
+    REQUEST_SIZE_MATCH (xSyncTriggerFenceReq);
+    swapl(&stuff->fid, n);
+
+    return ProcSyncTriggerFence(client);
+}
+
+static int
+SProcSyncResetFence(ClientPtr client)
+{
+    REQUEST(xSyncResetFenceReq);
+    char n;
+
+    swaps(&stuff->length, n);
+    REQUEST_SIZE_MATCH (xSyncResetFenceReq);
+    swapl(&stuff->fid, n);
+
+    return ProcSyncResetFence(client);
+}
+
+static int
+SProcSyncDestroyFence(ClientPtr client)
+{
+    REQUEST(xSyncDestroyFenceReq);
+    char n;
+
+    swaps(&stuff->length, n);
+    REQUEST_SIZE_MATCH (xSyncDestroyFenceReq);
+    swapl(&stuff->fid, n);
+
+    return ProcSyncDestroyFence(client);
+}
+
+static int
+SProcSyncQueryFence(ClientPtr client)
+{
+    REQUEST(xSyncQueryFenceReq);
+    char   n;
+
+    swaps(&stuff->length, n);
+    REQUEST_SIZE_MATCH (xSyncQueryFenceReq);
+    swapl(&stuff->fid, n);
+
+    return ProcSyncQueryFence(client);
+}
 
 static int
 SProcSyncDispatch(ClientPtr client)
@@ -2210,6 +2427,7 @@ SyncExtensionInit(void)
     }
     RTAlarm = CreateNewResourceType(FreeAlarm, "SyncAlarm");
     RTAwait = CreateNewResourceType(FreeAwait, "SyncAwait");
+    RTFence = CreateNewResourceType(FreeFence, "SyncFence");
     if (RTAwait)
 	RTAwait |= RC_NEVERRETAIN;
     RTAlarmClient = CreateNewResourceType(FreeAlarmClient, "SyncAlarmClient");
@@ -2236,6 +2454,7 @@ SyncExtensionInit(void)
 
     SetResourceTypeErrorValue(RTCounter, SyncErrorBase + XSyncBadCounter);
     SetResourceTypeErrorValue(RTAlarm, SyncErrorBase + XSyncBadAlarm);
+    SetResourceTypeErrorValue(RTFence, SyncErrorBase + XSyncBadFence);
 
     /*
      * Although SERVERTIME is implemented by the OS layer, we initialise it