1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_timeline.c b/drivers/gpu/drm/i915/i915_gem_timeline.c
new file mode 100644
index 000000000000..bf8a471b61e6
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_timeline.c
@@ -0,0 +1,90 @@
+/*
+ * 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.
+ *
+ */
+
+#include "i915_drv.h"
+
+static int __i915_gem_timeline_init(struct drm_i915_private *i915,
+				    struct i915_gem_timeline *timeline,
+				    const char *name,
+				    struct lock_class_key *lockclass,
+				    const char *lockname)
+{
+	unsigned int i;
+	u64 fences;
+
+	lockdep_assert_held(&i915->drm.struct_mutex);
+
+	timeline->i915 = i915;
+	timeline->name = kstrdup(name ?: "[kernel]", GFP_KERNEL);
+	if (!timeline->name)
+		return -ENOMEM;
+
+	list_add(&timeline->link, &i915->gt.timelines);
+
+	/* Called during early_init before we know how many engines there are */
+	fences = dma_fence_context_alloc(ARRAY_SIZE(timeline->engine));
+	for (i = 0; i < ARRAY_SIZE(timeline->engine); i++) {
+		struct intel_timeline *tl = &timeline->engine[i];
+
+		tl->fence_context = fences++;
+		tl->common = timeline;
+#ifdef CONFIG_DEBUG_SPINLOCK
+		__raw_spin_lock_init(&tl->lock.rlock, lockname, lockclass);
+#else
+		spin_lock_init(&tl->lock);
+#endif
+		init_request_active(&tl->last_request, NULL);
+		INIT_LIST_HEAD(&tl->requests);
+	}
+
+	return 0;
+}
+
+int i915_gem_timeline_init(struct drm_i915_private *i915,
+			   struct i915_gem_timeline *timeline,
+			   const char *name)
+{
+	static struct lock_class_key class;
+
+	return __i915_gem_timeline_init(i915, timeline, name,
+					&class, "&timeline->lock");
+}
+
+int i915_gem_timeline_init__global(struct drm_i915_private *i915)
+{
+	static struct lock_class_key class;
+
+	return __i915_gem_timeline_init(i915,
+					&i915->gt.global_timeline,
+					"[execution]",
+					&class, "&global_timeline->lock");
+}
+
+void i915_gem_timeline_fini(struct i915_gem_timeline *tl)
+{
+	lockdep_assert_held(&tl->i915->drm.struct_mutex);
+
+	list_del(&tl->link);
+	kfree(tl->name);
+}