diff --git a/libdrm/nouveau/nouveau_private.h b/libdrm/nouveau/nouveau_private.h
index 67144e3..9ce87fb 100644
--- a/libdrm/nouveau/nouveau_private.h
+++ b/libdrm/nouveau/nouveau_private.h
@@ -41,6 +41,7 @@
 struct nouveau_pushbuf_priv {
 	struct nouveau_pushbuf base;
 
+	int no_aper_update;
 	int use_cal;
 	uint32_t cal_suffix0;
 	uint32_t cal_suffix1;
diff --git a/libdrm/nouveau/nouveau_pushbuf.c b/libdrm/nouveau/nouveau_pushbuf.c
index fbcddd7..d434a5f 100644
--- a/libdrm/nouveau/nouveau_pushbuf.c
+++ b/libdrm/nouveau/nouveau_pushbuf.c
@@ -202,10 +202,17 @@ nouveau_pushbuf_init_call(struct nouveau_channel *chan)
 	req.channel = chan->id;
 	req.handle = 0;
 	ret = drmCommandWriteRead(nouveau_device(dev)->fd,
-				  DRM_NOUVEAU_GEM_PUSHBUF_CALL,
+				  DRM_NOUVEAU_GEM_PUSHBUF_CALL2,
 				  &req, sizeof(req));
-	if (ret)
-		return;
+	if (ret) {
+		ret = drmCommandWriteRead(nouveau_device(dev)->fd,
+					  DRM_NOUVEAU_GEM_PUSHBUF_CALL2,
+					  &req, sizeof(req));
+		if (ret)
+			return;
+
+		nvpb->no_aper_update = 1;
+	}
 
 	for (i = 0; i < CALPB_BUFFERS; i++) {
 		ret = nouveau_bo_new(dev, NOUVEAU_BO_GART | NOUVEAU_BO_MAP,
@@ -282,14 +289,18 @@ restart_cal:
 				nvpb->current_offset;
 		req.suffix0 = nvpb->cal_suffix0;
 		req.suffix1 = nvpb->cal_suffix1;
-		ret = drmCommandWriteRead(nvdev->fd,
-					  DRM_NOUVEAU_GEM_PUSHBUF_CALL,
+		ret = drmCommandWriteRead(nvdev->fd, nvpb->no_aper_update ?
+					  DRM_NOUVEAU_GEM_PUSHBUF_CALL :
+					  DRM_NOUVEAU_GEM_PUSHBUF_CALL2,
 					  &req, sizeof(req));
 		if (ret == -EAGAIN)
 			goto restart_cal;
 		nvpb->cal_suffix0 = req.suffix0;
 		nvpb->cal_suffix1 = req.suffix1;
-		assert(ret == 0);
+		if (!nvpb->no_aper_update) {
+			nvdev->base.vm_vram_size = req.vram_available;
+			nvdev->base.vm_gart_size = req.gart_available;
+		}
 	} else {
 		struct drm_nouveau_gem_pushbuf req;
 
@@ -305,7 +316,6 @@ restart_push:
 				      &req, sizeof(req));
 		if (ret == -EAGAIN)
 			goto restart_push;
-		assert(ret == 0);
 	}
 
 
@@ -328,12 +338,11 @@ restart_push:
 	nvpb->nr_relocs = 0;
 
 	/* Allocate space for next push buffer */
-	ret = nouveau_pushbuf_space(chan, min);
-	assert(!ret);
+	assert(!nouveau_pushbuf_space(chan, min));
 
 	if (chan->flush_notify)
 		chan->flush_notify(chan);
 
-	return 0;
+	return ret;
 }
 
diff --git a/shared-core/nouveau_drm.h b/shared-core/nouveau_drm.h
index 2050357..1e67c44 100644
--- a/shared-core/nouveau_drm.h
+++ b/shared-core/nouveau_drm.h
@@ -155,6 +155,9 @@ struct drm_nouveau_gem_pushbuf_call {
 	uint64_t relocs;
 	uint32_t suffix0;
 	uint32_t suffix1;
+	/* below only accessed for CALL2 */
+	uint64_t vram_available;
+	uint64_t gart_available;
 };
 
 struct drm_nouveau_gem_pin {
@@ -212,5 +215,6 @@ struct drm_nouveau_sarea {
 #define DRM_NOUVEAU_GEM_CPU_PREP       0x45
 #define DRM_NOUVEAU_GEM_CPU_FINI       0x46
 #define DRM_NOUVEAU_GEM_INFO           0x47
+#define DRM_NOUVEAU_GEM_PUSHBUF_CALL2  0x48
 
 #endif /* __NOUVEAU_DRM_H__ */