1 files changed, 0 insertions, 91 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 89a5f8d948e7..4b5364d477f1 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2818,97 +2818,6 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 	return ret;
 }
 
-static int
-__i915_gem_object_sync(struct drm_i915_gem_request *to,
-		       struct drm_i915_gem_request *from)
-{
-	int ret;
-
-	if (to->engine == from->engine)
-		return 0;
-
-	if (!i915.semaphores) {
-		ret = i915_wait_request(from,
-					from->i915->mm.interruptible |
-					I915_WAIT_LOCKED,
-					NULL,
-					NO_WAITBOOST);
-		if (ret)
-			return ret;
-	} else {
-		int idx = intel_engine_sync_index(from->engine, to->engine);
-		if (from->fence.seqno <= from->engine->semaphore.sync_seqno[idx])
-			return 0;
-
-		trace_i915_gem_ring_sync_to(to, from);
-		ret = to->engine->semaphore.sync_to(to, from);
-		if (ret)
-			return ret;
-
-		from->engine->semaphore.sync_seqno[idx] = from->fence.seqno;
-	}
-
-	return 0;
-}
-
-/**
- * i915_gem_object_sync - sync an object to a ring.
- *
- * @obj: object which may be in use on another ring.
- * @to: request we are wishing to use
- *
- * This code is meant to abstract object synchronization with the GPU.
- * Conceptually we serialise writes between engines inside the GPU.
- * We only allow one engine to write into a buffer at any time, but
- * multiple readers. To ensure each has a coherent view of memory, we must:
- *
- * - If there is an outstanding write request to the object, the new
- *   request must wait for it to complete (either CPU or in hw, requests
- *   on the same ring will be naturally ordered).
- *
- * - If we are a write request (pending_write_domain is set), the new
- *   request must wait for outstanding read requests to complete.
- *
- * Returns 0 if successful, else propagates up the lower layer error.
- */
-int
-i915_gem_object_sync(struct drm_i915_gem_object *obj,
-		     struct drm_i915_gem_request *to)
-{
-	struct i915_gem_active *active;
-	unsigned long active_mask;
-	int idx;
-
-	lockdep_assert_held(&obj->base.dev->struct_mutex);
-
-	active_mask = i915_gem_object_get_active(obj);
-	if (!active_mask)
-		return 0;
-
-	if (obj->base.pending_write_domain) {
-		active = obj->last_read;
-	} else {
-		active_mask = 1;
-		active = &obj->last_write;
-	}
-
-	for_each_active(active_mask, idx) {
-		struct drm_i915_gem_request *request;
-		int ret;
-
-		request = i915_gem_active_peek(&active[idx],
-					       &obj->base.dev->struct_mutex);
-		if (!request)
-			continue;
-
-		ret = __i915_gem_object_sync(to, request);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-
 static void __i915_vma_iounmap(struct i915_vma *vma)
 {
 	GEM_BUG_ON(i915_vma_is_pinned(vma));