1 files changed, 106 insertions, 0 deletions
diff --git a/src/radeon_sync.c b/src/radeon_sync.c
new file mode 100644
index 00000000..3baa12f3
--- /dev/null
+++ b/src/radeon_sync.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright © 2013 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL 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 PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include "radeon.h"
+
+/*
+ * This whole file exists to wrap a sync fence trigger operation
+ * so that we can flush the batch buffer to provide serialization
+ * between the server and the shm fence client
+ */
+
+static DevPrivateKeyRec radeon_sync_fence_private_key;
+
+typedef struct _radeon_sync_fence_private {
+        SyncFenceSetTriggeredFunc set_triggered;
+} radeon_sync_fence_private;
+
+#define SYNC_FENCE_PRIV(pFence)                                         \
+        (radeon_sync_fence_private *) dixLookupPrivate(&pFence->devPrivates, &radeon_sync_fence_private_key)
+
+static void
+radeon_sync_fence_set_triggered (SyncFence *fence)
+{
+        ScreenPtr screen = fence->pScreen;
+        ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
+        RADEONInfoPtr info = RADEONPTR(scrn);
+        radeon_sync_fence_private *private = SYNC_FENCE_PRIV(fence);
+
+        /* Flush pending rendering operations */
+        if (info->flush_rendering)
+            info->flush_rendering(scrn);
+
+        fence->funcs.SetTriggered = private->set_triggered;
+        (*fence->funcs.SetTriggered)(fence);
+        private->set_triggered = fence->funcs.SetTriggered;
+        fence->funcs.SetTriggered = radeon_sync_fence_set_triggered;
+}
+
+static void
+radeon_sync_create_fence(ScreenPtr screen,
+                        SyncFence *fence,
+                        Bool initially_triggered)
+{
+        ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
+        RADEONInfoPtr info = RADEONPTR(scrn);
+        SyncScreenFuncsPtr screen_funcs = miSyncGetScreenFuncs(screen);
+        radeon_sync_fence_private *private = SYNC_FENCE_PRIV(fence);
+
+        screen_funcs->CreateFence = info->save_sync_screen_funcs.CreateFence;
+        (*screen_funcs->CreateFence)(screen, fence, initially_triggered);
+
+        private->set_triggered = fence->funcs.SetTriggered;
+        fence->funcs.SetTriggered = radeon_sync_fence_set_triggered;
+}
+
+Bool
+radeon_sync_init(ScreenPtr screen)
+{
+        ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
+        RADEONInfoPtr info = RADEONPTR(scrn);
+        SyncScreenFuncsPtr screen_funcs;
+        if (!miSyncShmScreenInit(screen))
+                return FALSE;
+
+        if (!dixPrivateKeyRegistered(&radeon_sync_fence_private_key)) {
+                if (!dixRegisterPrivateKey(&radeon_sync_fence_private_key,
+                                           PRIVATE_SYNC_FENCE,
+                                           sizeof (radeon_sync_fence_private)))
+                        return FALSE;
+        }
+
+        screen_funcs = miSyncGetScreenFuncs(screen);
+        info->save_sync_screen_funcs.CreateFence = screen_funcs->CreateFence;
+        screen_funcs->CreateFence = radeon_sync_create_fence;
+        return TRUE;
+}
+
+void
+radeon_sync_close(ScreenPtr screen)
+{
+        ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
+        RADEONInfoPtr info = RADEONPTR(scrn);
+        SyncScreenFuncsPtr screen_funcs = miSyncGetScreenFuncs(screen);
+
+        if (screen_funcs)
+                screen_funcs->CreateFence = info->save_sync_screen_funcs.CreateFence;
+}