1 files changed, 125 insertions, 0 deletions
diff --git a/linux-core/xgi_fence.c b/linux-core/xgi_fence.c
new file mode 100644
index 00000000..e5b545de
--- /dev/null
+++ b/linux-core/xgi_fence.c
@@ -0,0 +1,125 @@
+/*
+ * (C) Copyright IBM Corporation 2007
+ * 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
+ * on 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 above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * 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 AUTHORS AND/OR THEIR 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.
+ *
+ * Authors:
+ *    Ian Romanick <idr@us.ibm.com>
+ */
+
+#include "xgi_drv.h"
+#include "xgi_regs.h"
+#include "xgi_misc.h"
+#include "xgi_cmdlist.h"
+
+static uint32_t xgi_do_flush(struct drm_device * dev, uint32_t class)
+{
+	struct xgi_info * info = dev->dev_private;
+	struct drm_fence_class_manager * fc = &dev->fm.class[class];
+	uint32_t pending_flush_types = 0;
+	uint32_t signaled_flush_types = 0;
+
+
+	if ((info == NULL) || (class != 0))
+		return 0;
+
+	spin_lock(&info->fence_lock);
+
+	pending_flush_types = fc->pending_flush |
+		((fc->pending_exe_flush) ? DRM_FENCE_TYPE_EXE : 0);
+
+	if (pending_flush_types) {
+		if (pending_flush_types & DRM_FENCE_TYPE_EXE) {
+			const u32 begin_id = DRM_READ32(info->mmio_map,
+							0x2820)
+				& BEGIN_BEGIN_IDENTIFICATION_MASK;
+
+			if (begin_id != info->complete_sequence) {
+				info->complete_sequence = begin_id;
+				signaled_flush_types |= DRM_FENCE_TYPE_EXE;
+			}
+		}
+
+		if (signaled_flush_types) {
+			drm_fence_handler(dev, 0, info->complete_sequence,
+					  signaled_flush_types);
+		}
+	}
+
+	spin_unlock(&info->fence_lock);
+
+	return fc->pending_flush |
+		((fc->pending_exe_flush) ? DRM_FENCE_TYPE_EXE : 0);
+}
+
+
+int xgi_fence_emit_sequence(struct drm_device * dev, uint32_t class,
+			    uint32_t flags, uint32_t * sequence, 
+			    uint32_t * native_type)
+{
+	struct xgi_info * info = dev->dev_private;
+
+	if ((info == NULL) || (class != 0))
+		return -EINVAL;
+
+
+	spin_lock(&info->fence_lock);
+	info->next_sequence++;
+	if (info->next_sequence > BEGIN_BEGIN_IDENTIFICATION_MASK) {
+		info->next_sequence = 1;
+	}
+	spin_unlock(&info->fence_lock);
+	
+
+	*sequence = (uint32_t) info->next_sequence;
+	*native_type = DRM_FENCE_TYPE_EXE;
+
+	return 0;
+}
+
+
+void xgi_poke_flush(struct drm_device * dev, uint32_t class)
+{
+	struct drm_fence_manager * fm = &dev->fm;
+	unsigned long flags;
+
+
+	write_lock_irqsave(&fm->lock, flags);
+	xgi_do_flush(dev, class);
+	write_unlock_irqrestore(&fm->lock, flags);
+}
+
+
+void xgi_fence_handler(struct drm_device * dev)
+{
+	struct drm_fence_manager * fm = &dev->fm;
+
+
+	write_lock(&fm->lock);
+	xgi_do_flush(dev, 0);
+	write_unlock(&fm->lock);
+}
+
+
+int xgi_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags)
+{
+	return ((class == 0) && (flags == DRM_FENCE_TYPE_EXE)) ? 1 : 0;
+}