1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_timeline.h b/drivers/gpu/drm/i915/i915_gem_timeline.h
new file mode 100644
index 0000000..98d99a6
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_timeline.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright © 2016 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.
+ *
+ */
+
+#ifndef I915_GEM_TIMELINE_H
+#define I915_GEM_TIMELINE_H
+
+#include <linux/list.h>
+
+#include "i915_gem_request.h"
+
+struct i915_gem_timeline;
+
+struct intel_timeline {
+	u64 fence_context;
+	u32 last_submitted_seqno;
+
+	spinlock_t lock;
+
+	/**
+	 * List of breadcrumbs associated with GPU requests currently
+	 * outstanding.
+	 */
+	struct list_head requests;
+
+	/* Contains an RCU guarded pointer to the last request. No reference is
+	 * held to the request, users must carefully acquire a reference to
+	 * the request using i915_gem_active_get_request_rcu(), or hold the
+	 * struct_mutex.
+	 */
+	struct i915_gem_active last_request;
+	u32 sync_seqno[I915_NUM_ENGINES];
+
+	struct i915_gem_timeline *common;
+};
+
+struct i915_gem_timeline {
+	struct list_head link;
+	atomic_t next_seqno;
+
+	struct drm_i915_private *i915;
+	const char *name;
+
+	struct intel_timeline engine[I915_NUM_ENGINES];
+};
+
+int i915_gem_timeline_init(struct drm_i915_private *i915,
+			   struct i915_gem_timeline *tl,
+			   const char *name);
+int i915_gem_timeline_init__global(struct drm_i915_private *i915);
+void i915_gem_timeline_fini(struct i915_gem_timeline *tl);
+
+#endif