diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 748041a..9b406e42 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1422,8 +1422,16 @@
 static int intel_init_ring_buffer(struct drm_device *dev,
 				  struct intel_engine_cs *ring)
 {
+	struct intel_ringbuffer *ringbuf = ring->buffer;
 	int ret;
 
+	if (ringbuf == NULL) {
+		ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL);
+		if (!ringbuf)
+			return -ENOMEM;
+		ring->buffer = ringbuf;
+	}
+
 	ring->dev = dev;
 	INIT_LIST_HEAD(&ring->active_list);
 	INIT_LIST_HEAD(&ring->request_list);
@@ -1435,18 +1443,18 @@
 	if (I915_NEED_GFX_HWS(dev)) {
 		ret = init_status_page(ring);
 		if (ret)
-			return ret;
+			goto error;
 	} else {
 		BUG_ON(ring->id != RCS);
 		ret = init_phys_status_page(ring);
 		if (ret)
-			return ret;
+			goto error;
 	}
 
 	ret = allocate_ring_buffer(ring);
 	if (ret) {
 		DRM_ERROR("Failed to allocate ringbuffer %s: %d\n", ring->name, ret);
-		return ret;
+		goto error;
 	}
 
 	/* Workaround an erratum on the i830 which causes a hang if
@@ -1459,9 +1467,18 @@
 
 	ret = i915_cmd_parser_init_ring(ring);
 	if (ret)
-		return ret;
+		goto error;
 
-	return ring->init(ring);
+	ret = ring->init(ring);
+	if (ret)
+		goto error;
+
+	return 0;
+
+error:
+	kfree(ringbuf);
+	ring->buffer = NULL;
+	return ret;
 }
 
 void intel_cleanup_ring_buffer(struct intel_engine_cs *ring)
@@ -1488,6 +1505,9 @@
 	cleanup_status_page(ring);
 
 	i915_cmd_parser_fini_ring(ring);
+
+	kfree(ring->buffer);
+	ring->buffer = NULL;
 }
 
 static int intel_ring_wait_request(struct intel_engine_cs *ring, int n)
@@ -2022,15 +2042,24 @@
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_engine_cs *ring = &dev_priv->ring[RCS];
+	struct intel_ringbuffer *ringbuf = ring->buffer;
 	int ret;
 
+	if (ringbuf == NULL) {
+		ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL);
+		if (!ringbuf)
+			return -ENOMEM;
+		ring->buffer = ringbuf;
+	}
+
 	ring->name = "render ring";
 	ring->id = RCS;
 	ring->mmio_base = RENDER_RING_BASE;
 
 	if (INTEL_INFO(dev)->gen >= 6) {
 		/* non-kms not supported on gen6+ */
-		return -ENODEV;
+		ret = -ENODEV;
+		goto err_ringbuf;
 	}
 
 	/* Note: gem is not supported on gen5/ilk without kms (the corresponding
@@ -2074,16 +2103,24 @@
 	if (ring->virtual_start == NULL) {
 		DRM_ERROR("can not ioremap virtual address for"
 			  " ring buffer\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto err_ringbuf;
 	}
 
 	if (!I915_NEED_GFX_HWS(dev)) {
 		ret = init_phys_status_page(ring);
 		if (ret)
-			return ret;
+			goto err_vstart;
 	}
 
 	return 0;
+
+err_vstart:
+	iounmap(ring->virtual_start);
+err_ringbuf:
+	kfree(ringbuf);
+	ring->buffer = NULL;
+	return ret;
 }
 
 int intel_init_bsd_ring_buffer(struct drm_device *dev)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 7027473..a0ac668 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -58,6 +58,27 @@
 	bool deadlock;
 };
 
+struct intel_ringbuffer {
+	struct drm_i915_gem_object *obj;
+	void __iomem *virtual_start;
+
+	u32 head;
+	u32 tail;
+	int space;
+	int size;
+	int effective_size;
+
+	/** We track the position of the requests in the ring buffer, and
+	 * when each is retired we increment last_retired_head as the GPU
+	 * must have finished processing the request and so we know we
+	 * can advance the ringbuffer up to that position.
+	 *
+	 * last_retired_head is set to -1 after the value is consumed so
+	 * we can detect new retirements.
+	 */
+	u32 last_retired_head;
+};
+
 struct  intel_engine_cs {
 	const char	*name;
 	enum intel_ring_id {
@@ -73,6 +94,7 @@
 	void		__iomem *virtual_start;
 	struct		drm_device *dev;
 	struct		drm_i915_gem_object *obj;
+	struct intel_ringbuffer *buffer;
 
 	u32		head;
 	u32		tail;
@@ -217,7 +239,7 @@
 static inline bool
 intel_ring_initialized(struct intel_engine_cs *ring)
 {
-	return ring->obj != NULL;
+	return ring->buffer && ring->obj;
 }
 
 static inline unsigned