lib: Add media spin

The media spin utility is derived from media fill. The purpose
is to create a simple means to keep the render engine (media
pipeline) busy for a controlled amount of time. It does so by
emitting a batch with a single execution thread that spins in
a tight loop the requested number of times. Each spin increments
a counter whose final 32-bit value is written to the destination
buffer on completion for checking. The implementation supports
Gen8, Gen8lp, and Gen9.

v2: Apply the recommendations of igt.cocci.

Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Tested-by: Lei Liu <lei.a.liu@intel.com>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/lib/media_spin.h b/lib/media_spin.h
new file mode 100644
index 00000000..8bc48291
--- /dev/null
+++ b/lib/media_spin.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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:
+ * 	Jeff McGee <jeff.mcgee@intel.com>
+ */
+
+#ifndef MEDIA_SPIN_H
+#define MEDIA_SPIN_H
+
+void gen8_media_spinfunc(struct intel_batchbuffer *batch,
+			 struct igt_buf *dst, uint32_t spins);
+
+void gen8lp_media_spinfunc(struct intel_batchbuffer *batch,
+			   struct igt_buf *dst, uint32_t spins);
+
+void gen9_media_spinfunc(struct intel_batchbuffer *batch,
+			 struct igt_buf *dst, uint32_t spins);
+
+#endif /* MEDIA_SPIN_H */