1 files changed, 125 insertions, 0 deletions
diff --git a/linux-core/radeon_fence.c b/linux-core/radeon_fence.c
new file mode 100644
index 00000000..682f0bee
--- /dev/null
+++ b/linux-core/radeon_fence.c
@@ -0,0 +1,125 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * 
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
+ */
+
+#include "drmP.h"
+#include "drm.h"
+#include "radeon_drm.h"
+#include "radeon_drv.h"
+
+/*
+ * Implements an intel sync flush operation.
+ */
+
+static void radeon_perform_flush(struct drm_device * dev)
+{
+	drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
+	struct drm_fence_manager *fm = &dev->fm;
+	struct drm_fence_class_manager *fc = &dev->fm.fence_class[0];
+	struct drm_fence_driver *driver = dev->driver->fence_driver;
+	uint32_t pending_flush_types = 0;
+	uint32_t sequence;
+
+	if (!dev_priv)
+		return;
+
+	pending_flush_types = fc->pending_flush |
+		((fc->pending_exe_flush) ? DRM_FENCE_TYPE_EXE : 0);
+
+	if (pending_flush_types) {
+		sequence = READ_BREADCRUMB(dev_priv);
+					     
+		drm_fence_handler(dev, 0, sequence, pending_flush_types, 0);
+	}
+
+	return;
+}
+
+void radeon_poke_flush(struct drm_device * dev, uint32_t class)
+{
+	struct drm_fence_manager *fm = &dev->fm;
+	unsigned long flags;
+
+	if (class != 0)
+		return;
+
+	write_lock_irqsave(&fm->lock, flags);
+	radeon_perform_flush(dev);
+	write_unlock_irqrestore(&fm->lock, flags);
+}
+
+int radeon_fence_emit_sequence(struct drm_device *dev, uint32_t class,
+			       uint32_t flags, uint32_t *sequence,
+			       uint32_t *native_type)
+{
+	drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
+	RING_LOCALS;
+
+	if (!dev_priv)
+		return -EINVAL;
+
+	*native_type = DRM_FENCE_TYPE_EXE;
+	if (flags & DRM_RADEON_FENCE_FLAG_FLUSHED) {
+		*native_type |= DRM_RADEON_FENCE_TYPE_RW;
+		
+		BEGIN_RING(4);
+		
+		RADEON_FLUSH_CACHE();
+		RADEON_FLUSH_ZCACHE();
+		ADVANCE_RING();
+	}
+
+	radeon_emit_irq(dev);
+	*sequence = (uint32_t) dev_priv->counter;
+
+
+	return 0;
+}
+
+void radeon_fence_handler(struct drm_device * dev)
+{
+	struct drm_fence_manager *fm = &dev->fm;
+
+	write_lock(&fm->lock);
+	radeon_perform_flush(dev);
+	write_unlock(&fm->lock);
+}
+
+int radeon_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags)
+{
+	/*
+	 * We have an irq that tells us when we have a new breadcrumb.
+	 */
+
+	if (class == 0 && flags == DRM_FENCE_TYPE_EXE)
+		return 1;
+
+	return 0;
+}