From: Ben Skeggs <bskeggs@redhat.com>
Date: Thu, 20 Aug 2015 04:54:19 +0000 (+1000)
Subject: drm/nouveau/disp: convert user classes to new-style nvkm_object
X-Git-Tag: v4.14-rc1~4701^2^2~57
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0ce41e3c66ca8958dec427f1c46f64efdda90f30;p=platform%2Fkernel%2Flinux-rpi.git

drm/nouveau/disp: convert user classes to new-style nvkm_object

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/core/oproxy.h b/drivers/gpu/drm/nouveau/include/nvkm/core/oproxy.h
new file mode 100644
index 0000000..bd52236
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/include/nvkm/core/oproxy.h
@@ -0,0 +1,22 @@
+#ifndef __NVKM_OPROXY_H__
+#define __NVKM_OPROXY_H__
+#define nvkm_oproxy(p) container_of((p), struct nvkm_oproxy, base)
+#include <core/object.h>
+
+struct nvkm_oproxy {
+	const struct nvkm_oproxy_func *func;
+	struct nvkm_object base;
+	struct nvkm_object *object;
+};
+
+struct nvkm_oproxy_func {
+	void (*dtor[2])(struct nvkm_oproxy *);
+	int  (*init[2])(struct nvkm_oproxy *);
+	int  (*fini[2])(struct nvkm_oproxy *, bool suspend);
+};
+
+void nvkm_oproxy_ctor(const struct nvkm_oproxy_func *,
+		      const struct nvkm_oclass *, struct nvkm_oproxy *);
+int  nvkm_oproxy_new_(const struct nvkm_oproxy_func *,
+		      const struct nvkm_oclass *, struct nvkm_oproxy **);
+#endif
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/engine/disp.h b/drivers/gpu/drm/nouveau/include/nvkm/engine/disp.h
index 2df7765..026a18a 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/engine/disp.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/engine/disp.h
@@ -1,10 +1,14 @@
 #ifndef __NVKM_DISP_H__
 #define __NVKM_DISP_H__
+#define nvkm_disp(p) container_of((p), struct nvkm_disp, engine)
 #include <core/engine.h>
 #include <core/event.h>
 
 struct nvkm_disp {
 	struct nvkm_engine engine;
+	const struct nvkm_disp_func *func;
+
+	struct nvkm_oproxy *client;
 
 	struct list_head outp;
 	struct list_head conn;
@@ -13,6 +17,10 @@ struct nvkm_disp {
 	struct nvkm_event vblank;
 };
 
+struct nvkm_disp_func {
+	const struct nvkm_disp_oclass *root;
+};
+
 extern struct nvkm_oclass *nv04_disp_oclass;
 extern struct nvkm_oclass *nv50_disp_oclass;
 extern struct nvkm_oclass *g84_disp_oclass;
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/Kbuild b/drivers/gpu/drm/nouveau/nvkm/core/Kbuild
index 98cf39f..e56c8eb 100644
--- a/drivers/gpu/drm/nouveau/nvkm/core/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvkm/core/Kbuild
@@ -11,6 +11,7 @@ nvkm-y += nvkm/core/mm.o
 nvkm-y += nvkm/core/namedb.o
 nvkm-y += nvkm/core/notify.o
 nvkm-y += nvkm/core/object.o
+nvkm-y += nvkm/core/oproxy.o
 nvkm-y += nvkm/core/option.o
 nvkm-y += nvkm/core/parent.o
 nvkm-y += nvkm/core/ramht.o
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/oproxy.c b/drivers/gpu/drm/nouveau/nvkm/core/oproxy.c
new file mode 100644
index 0000000..b2b7435
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/core/oproxy.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include <core/oproxy.h>
+
+static int
+nvkm_oproxy_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
+{
+	return nvkm_object_mthd(nvkm_oproxy(object)->object, mthd, data, size);
+}
+
+static int
+nvkm_oproxy_ntfy(struct nvkm_object *object, u32 mthd,
+		 struct nvkm_event **pevent)
+{
+	return nvkm_object_ntfy(nvkm_oproxy(object)->object, mthd, pevent);
+}
+
+static int
+nvkm_oproxy_map(struct nvkm_object *object, u64 *addr, u32 *size)
+{
+	return nvkm_object_map(nvkm_oproxy(object)->object, addr, size);
+}
+
+static int
+nvkm_oproxy_rd08(struct nvkm_object *object, u64 addr, u8 *data)
+{
+	return nvkm_object_rd08(nvkm_oproxy(object)->object, addr, data);
+}
+
+static int
+nvkm_oproxy_rd16(struct nvkm_object *object, u64 addr, u16 *data)
+{
+	return nvkm_object_rd16(nvkm_oproxy(object)->object, addr, data);
+}
+
+static int
+nvkm_oproxy_rd32(struct nvkm_object *object, u64 addr, u32 *data)
+{
+	return nvkm_object_rd32(nvkm_oproxy(object)->object, addr, data);
+}
+
+static int
+nvkm_oproxy_wr08(struct nvkm_object *object, u64 addr, u8 data)
+{
+	return nvkm_object_wr08(nvkm_oproxy(object)->object, addr, data);
+}
+
+static int
+nvkm_oproxy_wr16(struct nvkm_object *object, u64 addr, u16 data)
+{
+	return nvkm_object_wr16(nvkm_oproxy(object)->object, addr, data);
+}
+
+static int
+nvkm_oproxy_wr32(struct nvkm_object *object, u64 addr, u32 data)
+{
+	return nvkm_object_wr32(nvkm_oproxy(object)->object, addr, data);
+}
+
+static int
+nvkm_oproxy_bind(struct nvkm_object *object, struct nvkm_gpuobj *parent,
+		 int align, struct nvkm_gpuobj **pgpuobj)
+{
+	return nvkm_object_bind(nvkm_oproxy(object)->object,
+				parent, align, pgpuobj);
+}
+
+static int
+nvkm_oproxy_sclass(struct nvkm_object *object, int index,
+		   struct nvkm_oclass *oclass)
+{
+	struct nvkm_oproxy *oproxy = nvkm_oproxy(object);
+	oclass->parent = oproxy->object;
+	if (oproxy->object->oclass)
+		return -ENOSYS;
+	if (!oproxy->object->func->sclass)
+		return -ENODEV;
+	return oproxy->object->func->sclass(oproxy->object, index, oclass);
+}
+
+static int
+nvkm_oproxy_fini(struct nvkm_object *object, bool suspend)
+{
+	struct nvkm_oproxy *oproxy = nvkm_oproxy(object);
+	int ret;
+
+	if (oproxy->func->fini[0]) {
+		ret = oproxy->func->fini[0](oproxy, suspend);
+		if (ret && suspend)
+			return ret;
+	}
+
+	ret = nvkm_object_fini(oproxy->object, suspend);
+	if (ret && suspend)
+		return ret;
+
+	if (oproxy->func->fini[1]) {
+		ret = oproxy->func->fini[1](oproxy, suspend);
+		if (ret && suspend)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int
+nvkm_oproxy_init(struct nvkm_object *object)
+{
+	struct nvkm_oproxy *oproxy = nvkm_oproxy(object);
+	int ret;
+
+	if (oproxy->func->init[0]) {
+		ret = oproxy->func->init[0](oproxy);
+		if (ret)
+			return ret;
+	}
+
+	ret = nvkm_object_init(oproxy->object);
+	if (ret)
+		return ret;
+
+	if (oproxy->func->init[1]) {
+		ret = oproxy->func->init[1](oproxy);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static void *
+nvkm_oproxy_dtor(struct nvkm_object *object)
+{
+	struct nvkm_oproxy *oproxy = nvkm_oproxy(object);
+	if (oproxy->func->dtor[0])
+		oproxy->func->dtor[0](oproxy);
+	nvkm_object_ref(NULL, &oproxy->object);
+	if (oproxy->func->dtor[1])
+		oproxy->func->dtor[1](oproxy);
+	return oproxy;
+}
+
+static const struct nvkm_object_func
+nvkm_oproxy_func = {
+	.dtor = nvkm_oproxy_dtor,
+	.init = nvkm_oproxy_init,
+	.fini = nvkm_oproxy_fini,
+	.mthd = nvkm_oproxy_mthd,
+	.ntfy = nvkm_oproxy_ntfy,
+	.map = nvkm_oproxy_map,
+	.rd08 = nvkm_oproxy_rd08,
+	.rd16 = nvkm_oproxy_rd16,
+	.rd32 = nvkm_oproxy_rd32,
+	.wr08 = nvkm_oproxy_wr08,
+	.wr16 = nvkm_oproxy_wr16,
+	.wr32 = nvkm_oproxy_wr32,
+	.bind = nvkm_oproxy_bind,
+	.sclass = nvkm_oproxy_sclass,
+};
+
+void
+nvkm_oproxy_ctor(const struct nvkm_oproxy_func *func,
+		 const struct nvkm_oclass *oclass, struct nvkm_oproxy *oproxy)
+{
+	nvkm_object_ctor(&nvkm_oproxy_func, oclass, &oproxy->base);
+	oproxy->func = func;
+}
+
+int
+nvkm_oproxy_new_(const struct nvkm_oproxy_func *func,
+		 const struct nvkm_oclass *oclass, struct nvkm_oproxy **poproxy)
+{
+	if (!(*poproxy = kzalloc(sizeof(**poproxy), GFP_KERNEL)))
+		return -ENOMEM;
+	nvkm_oproxy_ctor(func, oclass, *poproxy);
+	return 0;
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild b/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild
index 75fc7e6..04f6045 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild
@@ -53,17 +53,27 @@ nvkm-y += nvkm/engine/disp/dmacgf119.o
 
 nvkm-y += nvkm/engine/disp/basenv50.o
 nvkm-y += nvkm/engine/disp/baseg84.o
+nvkm-y += nvkm/engine/disp/basegt200.o
+nvkm-y += nvkm/engine/disp/basegt215.o
 nvkm-y += nvkm/engine/disp/basegf119.o
+nvkm-y += nvkm/engine/disp/basegk104.o
+nvkm-y += nvkm/engine/disp/basegk110.o
 
 nvkm-y += nvkm/engine/disp/corenv50.o
 nvkm-y += nvkm/engine/disp/coreg84.o
 nvkm-y += nvkm/engine/disp/coreg94.o
+nvkm-y += nvkm/engine/disp/coregt200.o
+nvkm-y += nvkm/engine/disp/coregt215.o
 nvkm-y += nvkm/engine/disp/coregf119.o
 nvkm-y += nvkm/engine/disp/coregk104.o
+nvkm-y += nvkm/engine/disp/coregk110.o
+nvkm-y += nvkm/engine/disp/coregm107.o
+nvkm-y += nvkm/engine/disp/coregm204.o
 
 nvkm-y += nvkm/engine/disp/ovlynv50.o
 nvkm-y += nvkm/engine/disp/ovlyg84.o
 nvkm-y += nvkm/engine/disp/ovlygt200.o
+nvkm-y += nvkm/engine/disp/ovlygt215.o
 nvkm-y += nvkm/engine/disp/ovlygf119.o
 nvkm-y += nvkm/engine/disp/ovlygk104.o
 
@@ -71,7 +81,13 @@ nvkm-y += nvkm/engine/disp/piocnv50.o
 nvkm-y += nvkm/engine/disp/piocgf119.o
 
 nvkm-y += nvkm/engine/disp/cursnv50.o
+nvkm-y += nvkm/engine/disp/cursg84.o
+nvkm-y += nvkm/engine/disp/cursgt215.o
 nvkm-y += nvkm/engine/disp/cursgf119.o
+nvkm-y += nvkm/engine/disp/cursgk104.o
 
 nvkm-y += nvkm/engine/disp/oimmnv50.o
+nvkm-y += nvkm/engine/disp/oimmg84.o
+nvkm-y += nvkm/engine/disp/oimmgt215.o
 nvkm-y += nvkm/engine/disp/oimmgf119.o
+nvkm-y += nvkm/engine/disp/oimmgk104.o
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
index fea8516..165f9d4 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
@@ -25,7 +25,9 @@
 #include "conn.h"
 #include "outp.h"
 
+#include <core/client.h>
 #include <core/notify.h>
+#include <core/oproxy.h>
 #include <subdev/bios.h>
 #include <subdev/bios/dcb.h>
 
@@ -114,6 +116,66 @@ nvkm_disp_ntfy(struct nvkm_object *object, u32 type, struct nvkm_event **event)
 	return -EINVAL;
 }
 
+static void
+nvkm_disp_class_del(struct nvkm_oproxy *oproxy)
+{
+	struct nvkm_disp *disp = nvkm_disp(oproxy->base.engine);
+	mutex_lock(&disp->engine.subdev.mutex);
+	if (disp->client == oproxy)
+		disp->client = NULL;
+	mutex_unlock(&disp->engine.subdev.mutex);
+}
+
+static const struct nvkm_oproxy_func
+nvkm_disp_class = {
+	.dtor[1] = nvkm_disp_class_del,
+};
+
+static int
+nvkm_disp_class_new(struct nvkm_device *device,
+		    const struct nvkm_oclass *oclass, void *data, u32 size,
+		    struct nvkm_object **pobject)
+{
+	const struct nvkm_disp_oclass *sclass = oclass->engn;
+	struct nvkm_disp *disp = nvkm_disp(oclass->engine);
+	struct nvkm_oproxy *oproxy;
+	int ret;
+
+	ret = nvkm_oproxy_new_(&nvkm_disp_class, oclass, &oproxy);
+	if (ret)
+		return ret;
+	*pobject = &oproxy->base;
+
+	mutex_lock(&disp->engine.subdev.mutex);
+	if (disp->client) {
+		mutex_unlock(&disp->engine.subdev.mutex);
+		return -EBUSY;
+	}
+	disp->client = oproxy;
+	mutex_unlock(&disp->engine.subdev.mutex);
+
+	return sclass->ctor(disp, oclass, data, size, &oproxy->object);
+}
+
+static const struct nvkm_device_oclass
+nvkm_disp_sclass = {
+	.ctor = nvkm_disp_class_new,
+};
+
+static int
+nvkm_disp_class_get(struct nvkm_oclass *oclass, int index,
+		    const struct nvkm_device_oclass **class)
+{
+	struct nvkm_disp *disp = nvkm_disp(oclass->engine);
+	if (index == 0) {
+		oclass->base = disp->func->root->base;
+		oclass->engn = disp->func->root;
+		*class = &nvkm_disp_sclass;
+		return 0;
+	}
+	return 1;
+}
+
 int
 _nvkm_disp_fini(struct nvkm_object *object, bool suspend)
 {
@@ -180,6 +242,11 @@ _nvkm_disp_dtor(struct nvkm_object *object)
 	nvkm_engine_destroy(&disp->engine);
 }
 
+static const struct nvkm_engine_func
+nvkm_disp = {
+	.base.sclass = nvkm_disp_class_get,
+};
+
 int
 nvkm_disp_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 		  struct nvkm_oclass *oclass, int heads, const char *intname,
@@ -203,6 +270,7 @@ nvkm_disp_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->engine.func = &nvkm_disp;
 	INIT_LIST_HEAD(&disp->outp);
 	INIT_LIST_HEAD(&disp->conn);
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/baseg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/baseg84.c
index c476ed0..6d17630 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/baseg84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/baseg84.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 g84_disp_base_mthd_base = {
@@ -53,13 +56,25 @@ g84_disp_base_mthd_base = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-g84_disp_base_mthd_chan = {
+const struct nv50_disp_chan_mthd
+g84_disp_base_chan_mthd = {
 	.name = "Base",
 	.addr = 0x000540,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &g84_disp_base_mthd_base },
 		{  "Image", 2, &nv50_disp_base_mthd_image },
 		{}
 	}
 };
+
+const struct nv50_disp_dmac_oclass
+g84_disp_base_oclass = {
+	.base.oclass = G82_DISP_BASE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_base_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &g84_disp_base_chan_mthd,
+	.chid = 1,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegf119.c
index d3c37b4..ebcb925 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegf119.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 gf119_disp_base_mthd_base = {
@@ -87,10 +90,11 @@ gf119_disp_base_mthd_image = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-gf119_disp_base_mthd_chan = {
+const struct nv50_disp_chan_mthd
+gf119_disp_base_chan_mthd = {
 	.name = "Base",
 	.addr = 0x001000,
+	.prev = -0x020000,
 	.data = {
 		{ "Global", 1, &gf119_disp_base_mthd_base },
 		{  "Image", 2, &gf119_disp_base_mthd_image },
@@ -98,17 +102,13 @@ gf119_disp_base_mthd_chan = {
 	}
 };
 
-struct nv50_disp_chan_impl
-gf119_disp_base_ofuncs = {
-	.base.ctor = nv50_disp_base_ctor,
-	.base.dtor = nv50_disp_dmac_dtor,
-	.base.init = gf119_disp_dmac_init,
-	.base.fini = gf119_disp_dmac_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_dmac_oclass
+gf119_disp_base_oclass = {
+	.base.oclass = GF110_DISP_BASE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_base_new,
+	.func = &gf119_disp_dmac_func,
+	.mthd = &gf119_disp_base_chan_mthd,
 	.chid = 1,
-	.attach = gf119_disp_dmac_object_attach,
-	.detach = gf119_disp_dmac_object_detach,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegk104.c
new file mode 100644
index 0000000..780a1d9
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegk104.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gk104_disp_base_oclass = {
+	.base.oclass = GK104_DISP_BASE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_base_new,
+	.func = &gf119_disp_dmac_func,
+	.mthd = &gf119_disp_base_chan_mthd,
+	.chid = 1,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegk110.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegk110.c
new file mode 100644
index 0000000..d8bdd24
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegk110.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gk110_disp_base_oclass = {
+	.base.oclass = GK110_DISP_BASE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_base_new,
+	.func = &gf119_disp_dmac_func,
+	.mthd = &gf119_disp_base_chan_mthd,
+	.chid = 1,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegt200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegt200.c
new file mode 100644
index 0000000..93451e4
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegt200.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gt200_disp_base_oclass = {
+	.base.oclass = GT200_DISP_BASE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_base_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &g84_disp_base_chan_mthd,
+	.chid = 1,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegt215.c
new file mode 100644
index 0000000..08e2b1f
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basegt215.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gt215_disp_base_oclass = {
+	.base.oclass = GT214_DISP_BASE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_base_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &g84_disp_base_chan_mthd,
+	.chid = 1,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basenv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basenv50.c
index cfb1eac..52775d8 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/basenv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/basenv50.c
@@ -22,12 +22,44 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
 
 #include <core/client.h>
 
 #include <nvif/class.h>
 #include <nvif/unpack.h>
 
+int
+nv50_disp_base_new(const struct nv50_disp_dmac_func *func,
+		   const struct nv50_disp_chan_mthd *mthd,
+		   struct nv50_disp_root *root, int chid,
+		   const struct nvkm_oclass *oclass, void *data, u32 size,
+		   struct nvkm_object **pobject)
+{
+	union {
+		struct nv50_disp_base_channel_dma_v0 v0;
+	} *args = data;
+	struct nvkm_object *parent = oclass->parent;
+	struct nv50_disp *disp = root->disp;
+	int head, ret;
+	u64 push;
+
+	nvif_ioctl(parent, "create disp base channel dma size %d\n", size);
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		nvif_ioctl(parent, "create disp base channel dma vers %d "
+				   "pushbuf %016llx head %d\n",
+			   args->v0.version, args->v0.pushbuf, args->v0.head);
+		if (args->v0.head > disp->head.nr)
+			return -EINVAL;
+		push = args->v0.pushbuf;
+		head = args->v0.head;
+	} else
+		return ret;
+
+	return nv50_disp_dmac_new_(func, mthd, root, chid + head,
+				   head, push, oclass, pobject);
+}
+
 static const struct nv50_disp_mthd_list
 nv50_disp_base_mthd_base = {
 	.mthd = 0x0000,
@@ -67,10 +99,11 @@ nv50_disp_base_mthd_image = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-nv50_disp_base_mthd_chan = {
+static const struct nv50_disp_chan_mthd
+nv50_disp_base_chan_mthd = {
 	.name = "Base",
 	.addr = 0x000540,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &nv50_disp_base_mthd_base },
 		{  "Image", 2, &nv50_disp_base_mthd_image },
@@ -78,50 +111,13 @@ nv50_disp_base_mthd_chan = {
 	}
 };
 
-int
-nv50_disp_base_ctor(struct nvkm_object *parent,
-		    struct nvkm_object *engine,
-		    struct nvkm_oclass *oclass, void *data, u32 size,
-		    struct nvkm_object **pobject)
-{
-	union {
-		struct nv50_disp_base_channel_dma_v0 v0;
-	} *args = data;
-	struct nv50_disp *disp = (void *)engine;
-	struct nv50_disp_dmac *dmac;
-	int ret;
-
-	nvif_ioctl(parent, "create disp base channel dma size %d\n", size);
-	if (nvif_unpack(args->v0, 0, 0, false)) {
-		nvif_ioctl(parent, "create disp base channel dma vers %d "
-				   "pushbuf %016llx head %d\n",
-			   args->v0.version, args->v0.pushbuf, args->v0.head);
-		if (args->v0.head > disp->head.nr)
-			return -EINVAL;
-	} else
-		return ret;
-
-	ret = nv50_disp_dmac_create_(parent, engine, oclass, args->v0.pushbuf,
-				     args->v0.head, sizeof(*dmac),
-				     (void **)&dmac);
-	*pobject = nv_object(dmac);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-struct nv50_disp_chan_impl
-nv50_disp_base_ofuncs = {
-	.base.ctor = nv50_disp_base_ctor,
-	.base.dtor = nv50_disp_dmac_dtor,
-	.base.init = nv50_disp_dmac_init,
-	.base.fini = nv50_disp_dmac_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_dmac_oclass
+nv50_disp_base_oclass = {
+	.base.oclass = NV50_DISP_BASE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_base_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &nv50_disp_base_chan_mthd,
 	.chid = 1,
-	.attach = nv50_disp_dmac_object_attach,
-	.detach = nv50_disp_dmac_object_detach,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.c
index 2999996..c9cbfbd 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.c
@@ -24,6 +24,10 @@
 #include "channv50.h"
 #include "rootnv50.h"
 
+#include <core/client.h>
+#include <core/ramht.h>
+#include <engine/dma.h>
+
 #include <nvif/class.h>
 #include <nvif/event.h>
 #include <nvif/unpack.h>
@@ -58,39 +62,38 @@ nv50_disp_mthd_list(struct nv50_disp *disp, int debug, u32 base, int c,
 }
 
 void
-nv50_disp_mthd_chan(struct nv50_disp *disp, int debug, int head,
-		    const struct nv50_disp_mthd_chan *chan)
+nv50_disp_chan_mthd(struct nv50_disp_chan *chan, int debug)
 {
-	struct nvkm_object *object = nv_object(disp);
-	const struct nv50_disp_impl *impl = (void *)object->oclass;
-	const struct nv50_disp_mthd_list *list;
+	struct nv50_disp *disp = chan->root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
+	const struct nv50_disp_chan_mthd *mthd = chan->mthd;
+	const struct nv50_disp_mthd_list *list;
 	int i, j;
 
-	if (debug > nv_subdev(disp)->debug)
+	if (debug > subdev->debug)
 		return;
 
-	for (i = 0; (list = chan->data[i].mthd) != NULL; i++) {
-		u32 base = head * chan->addr;
-		for (j = 0; j < chan->data[i].nr; j++, base += list->addr) {
-			const char *cname = chan->name;
+	for (i = 0; (list = mthd->data[i].mthd) != NULL; i++) {
+		u32 base = chan->head * mthd->addr;
+		for (j = 0; j < mthd->data[i].nr; j++, base += list->addr) {
+			const char *cname = mthd->name;
 			const char *sname = "";
 			char cname_[16], sname_[16];
 
-			if (chan->addr) {
+			if (mthd->addr) {
 				snprintf(cname_, sizeof(cname_), "%s %d",
-					 chan->name, head);
+					 mthd->name, chan->chid);
 				cname = cname_;
 			}
 
-			if (chan->data[i].nr > 1) {
+			if (mthd->data[i].nr > 1) {
 				snprintf(sname_, sizeof(sname_), " - %s %d",
-					 chan->data[i].name, j);
+					 mthd->data[i].name, j);
 				sname = sname_;
 			}
 
 			nvkm_printk_(subdev, debug, info, "%s%s:\n", cname, sname);
-			nv50_disp_mthd_list(disp, debug, base, impl->mthd.prev,
+			nv50_disp_mthd_list(disp, debug, base, mthd->prev,
 					    list, j);
 		}
 	}
@@ -127,7 +130,7 @@ int
 nv50_disp_chan_uevent_ctor(struct nvkm_object *object, void *data, u32 size,
 			   struct nvkm_notify *notify)
 {
-	struct nv50_disp_dmac *dmac = (void *)object;
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
 	union {
 		struct nvif_notify_uevent_req none;
 	} *args = data;
@@ -136,7 +139,7 @@ nv50_disp_chan_uevent_ctor(struct nvkm_object *object, void *data, u32 size,
 	if (nvif_unvers(args->none)) {
 		notify->size  = sizeof(struct nvif_notify_uevent_rep);
 		notify->types = 1;
-		notify->index = dmac->base.chid;
+		notify->index = chan->chid;
 		return 0;
 	}
 
@@ -151,10 +154,31 @@ nv50_disp_chan_uevent = {
 };
 
 int
+nv50_disp_chan_rd32(struct nvkm_object *object, u64 addr, u32 *data)
+{
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	struct nv50_disp *disp = chan->root->disp;
+	struct nvkm_device *device = disp->base.engine.subdev.device;
+	*data = nvkm_rd32(device, 0x640000 + (chan->chid * 0x1000) + addr);
+	return 0;
+}
+
+int
+nv50_disp_chan_wr32(struct nvkm_object *object, u64 addr, u32 data)
+{
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	struct nv50_disp *disp = chan->root->disp;
+	struct nvkm_device *device = disp->base.engine.subdev.device;
+	nvkm_wr32(device, 0x640000 + (chan->chid * 0x1000) + addr, data);
+	return 0;
+}
+
+int
 nv50_disp_chan_ntfy(struct nvkm_object *object, u32 type,
 		    struct nvkm_event **pevent)
 {
-	struct nv50_disp *disp = (void *)object->engine;
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	struct nv50_disp *disp = chan->root->disp;
 	switch (type) {
 	case NV50_DISP_CORE_CHANNEL_DMA_V0_NTFY_UEVENT:
 		*pevent = &disp->uevent;
@@ -168,62 +192,110 @@ nv50_disp_chan_ntfy(struct nvkm_object *object, u32 type,
 int
 nv50_disp_chan_map(struct nvkm_object *object, u64 *addr, u32 *size)
 {
-	struct nv50_disp_chan *chan = (void *)object;
-	*addr = nv_device_resource_start(nv_device(object), 0) +
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	struct nv50_disp *disp = chan->root->disp;
+	struct nvkm_device *device = disp->base.engine.subdev.device;
+	*addr = nv_device_resource_start(device, 0) +
 		0x640000 + (chan->chid * 0x1000);
 	*size = 0x001000;
 	return 0;
 }
 
-u32
-nv50_disp_chan_rd32(struct nvkm_object *object, u64 addr)
+static int
+nv50_disp_chan_child_new(const struct nvkm_oclass *oclass,
+			 void *data, u32 size, struct nvkm_object **pobject)
 {
-	struct nv50_disp_chan *chan = (void *)object;
-	struct nvkm_device *device = object->engine->subdev.device;
-	return nvkm_rd32(device, 0x640000 + (chan->chid * 0x1000) + addr);
+	struct nv50_disp_chan *chan = nv50_disp_chan(oclass->parent);
+	return chan->func->child_new(chan, oclass, data, size, pobject);
 }
 
-void
-nv50_disp_chan_wr32(struct nvkm_object *object, u64 addr, u32 data)
+static int
+nv50_disp_chan_child_get(struct nvkm_object *object, int index,
+			 struct nvkm_oclass *oclass)
 {
-	struct nv50_disp_chan *chan = (void *)object;
-	struct nvkm_device *device = object->engine->subdev.device;
-	nvkm_wr32(device, 0x640000 + (chan->chid * 0x1000) + addr, data);
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	if (chan->func->child_get) {
+		int ret = chan->func->child_get(chan, index, oclass);
+		if (ret == 0)
+			oclass->ctor = nv50_disp_chan_child_new;
+		return ret;
+	}
+	return -EINVAL;
 }
 
-void
-nv50_disp_chan_destroy(struct nv50_disp_chan *chan)
+static int
+nv50_disp_chan_fini(struct nvkm_object *object, bool suspend)
 {
-	struct nv50_disp_root *root = (void *)nv_object(chan)->parent;
-	root->chan &= ~(1 << chan->chid);
-	nvkm_namedb_destroy(&chan->base);
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	chan->func->fini(chan);
+	return 0;
 }
 
-int
-nv50_disp_chan_create_(struct nvkm_object *parent,
-		       struct nvkm_object *engine,
-		       struct nvkm_oclass *oclass, int head,
-		       int length, void **pobject)
+static int
+nv50_disp_chan_init(struct nvkm_object *object)
 {
-	const struct nv50_disp_chan_impl *impl = (void *)oclass->ofuncs;
-	struct nv50_disp_root *root = (void *)parent;
-	struct nv50_disp_chan *chan;
-	int chid = impl->chid + head;
-	int ret;
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	return chan->func->init(chan);
+}
 
-	if (root->chan & (1 << chid))
-		return -EBUSY;
-	root->chan |= (1 << chid);
+static void *
+nv50_disp_chan_dtor(struct nvkm_object *object)
+{
+	struct nv50_disp_chan *chan = nv50_disp_chan(object);
+	struct nv50_disp *disp = chan->root->disp;
+	if (chan->chid >= 0)
+		disp->chan[chan->chid] = NULL;
+	return chan->func->dtor ? chan->func->dtor(chan) : chan;
+}
 
-	ret = nvkm_namedb_create_(parent, engine, oclass, 0, NULL,
-				  (1ULL << NVDEV_ENGINE_DMAOBJ),
-				  length, pobject);
-	chan = *pobject;
-	if (ret)
-		return ret;
+static const struct nvkm_object_func
+nv50_disp_chan = {
+	.dtor = nv50_disp_chan_dtor,
+	.init = nv50_disp_chan_init,
+	.fini = nv50_disp_chan_fini,
+	.rd32 = nv50_disp_chan_rd32,
+	.wr32 = nv50_disp_chan_wr32,
+	.ntfy = nv50_disp_chan_ntfy,
+	.map = nv50_disp_chan_map,
+	.sclass = nv50_disp_chan_child_get,
+};
+
+int
+nv50_disp_chan_ctor(const struct nv50_disp_chan_func *func,
+		    const struct nv50_disp_chan_mthd *mthd,
+		    struct nv50_disp_root *root, int chid, int head,
+		    const struct nvkm_oclass *oclass,
+		    struct nv50_disp_chan *chan)
+{
+	struct nv50_disp *disp = root->disp;
+
+	nvkm_object_ctor(&nv50_disp_chan, oclass, &chan->object);
+	chan->func = func;
+	chan->mthd = mthd;
+	chan->root = root;
 	chan->chid = chid;
+	chan->head = head;
 
-	nv_parent(chan)->object_attach = impl->attach;
-	nv_parent(chan)->object_detach = impl->detach;
+	if (disp->chan[chan->chid]) {
+		chan->chid = -1;
+		return -EBUSY;
+	}
+	disp->chan[chan->chid] = chan;
 	return 0;
 }
+
+int
+nv50_disp_chan_new_(const struct nv50_disp_chan_func *func,
+		    const struct nv50_disp_chan_mthd *mthd,
+		    struct nv50_disp_root *root, int chid, int head,
+		    const struct nvkm_oclass *oclass,
+		    struct nvkm_object **pobject)
+{
+	struct nv50_disp_chan *chan;
+
+	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
+		return -ENOMEM;
+	*pobject = &chan->object;
+
+	return nv50_disp_chan_ctor(func, mthd, root, chid, head, oclass, chan);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h
index 982d1bf..aee3748 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h
@@ -1,28 +1,40 @@
 #ifndef __NV50_DISP_CHAN_H__
 #define __NV50_DISP_CHAN_H__
+#define nv50_disp_chan(p) container_of((p), struct nv50_disp_chan, object)
 #include "nv50.h"
 
-struct nv50_disp_chan_impl {
-	struct nvkm_ofuncs base;
+struct nv50_disp_chan {
+	const struct nv50_disp_chan_func *func;
+	const struct nv50_disp_chan_mthd *mthd;
+	struct nv50_disp_root *root;
 	int chid;
-	int  (*attach)(struct nvkm_object *, struct nvkm_object *, u32);
-	void (*detach)(struct nvkm_object *, int);
-};
+	int head;
 
-#include <core/namedb.h>
+	struct nvkm_object object;
+};
 
-struct nv50_disp_chan {
-	struct nvkm_namedb base;
-	int chid;
+struct nv50_disp_chan_func {
+	void *(*dtor)(struct nv50_disp_chan *);
+	int (*init)(struct nv50_disp_chan *);
+	void (*fini)(struct nv50_disp_chan *);
+	int (*child_get)(struct nv50_disp_chan *, int index,
+			 struct nvkm_oclass *);
+	int (*child_new)(struct nv50_disp_chan *, const struct nvkm_oclass *,
+			 void *data, u32 size, struct nvkm_object **);
 };
 
-int  nv50_disp_chan_create_(struct nvkm_object *, struct nvkm_object *,
-			    struct nvkm_oclass *, int, int, void **);
-void nv50_disp_chan_destroy(struct nv50_disp_chan *);
-int  nv50_disp_chan_ntfy(struct nvkm_object *, u32, struct nvkm_event **);
-int  nv50_disp_chan_map(struct nvkm_object *, u64 *, u32 *);
-u32  nv50_disp_chan_rd32(struct nvkm_object *, u64);
-void nv50_disp_chan_wr32(struct nvkm_object *, u64, u32);
+int nv50_disp_chan_ctor(const struct nv50_disp_chan_func *,
+			const struct nv50_disp_chan_mthd *,
+			struct nv50_disp_root *, int chid, int head,
+			const struct nvkm_oclass *, struct nv50_disp_chan *);
+int nv50_disp_chan_new_(const struct nv50_disp_chan_func *,
+			const struct nv50_disp_chan_mthd *,
+			struct nv50_disp_root *, int chid, int head,
+			const struct nvkm_oclass *, struct nvkm_object **);
+
+extern const struct nv50_disp_chan_func nv50_disp_pioc_func;
+extern const struct nv50_disp_chan_func gf119_disp_pioc_func;
+
 extern const struct nvkm_event_func nv50_disp_chan_uevent;
 int  nv50_disp_chan_uevent_ctor(struct nvkm_object *, void *, u32,
 				struct nvkm_notify *);
@@ -30,24 +42,6 @@ void nv50_disp_chan_uevent_send(struct nv50_disp *, int);
 
 extern const struct nvkm_event_func gf119_disp_chan_uevent;
 
-#define nv50_disp_chan_init(a)                                                 \
-	nvkm_namedb_init(&(a)->base)
-#define nv50_disp_chan_fini(a,b)                                               \
-	nvkm_namedb_fini(&(a)->base, (b))
-
-struct nv50_disp_pioc {
-	struct nv50_disp_chan base;
-};
-
-int  nv50_disp_pioc_create_(struct nvkm_object *, struct nvkm_object *,
-			    struct nvkm_oclass *, int, int, void **);
-void nv50_disp_pioc_dtor(struct nvkm_object *);
-int  nv50_disp_pioc_init(struct nvkm_object *);
-int  nv50_disp_pioc_fini(struct nvkm_object *, bool);
-
-int  gf119_disp_pioc_init(struct nvkm_object *);
-int  gf119_disp_pioc_fini(struct nvkm_object *, bool);
-
 struct nv50_disp_mthd_list {
 	u32 mthd;
 	u32 addr;
@@ -58,9 +52,10 @@ struct nv50_disp_mthd_list {
 	} data[];
 };
 
-struct nv50_disp_mthd_chan {
+struct nv50_disp_chan_mthd {
 	const char *name;
 	u32 addr;
+	s32 prev;
 	struct {
 		const char *name;
 		int nr;
@@ -68,36 +63,65 @@ struct nv50_disp_mthd_chan {
 	} data[];
 };
 
-void nv50_disp_mthd_chan(struct nv50_disp *, int debug, int head,
-			 const struct nv50_disp_mthd_chan *);
+void nv50_disp_chan_mthd(struct nv50_disp_chan *, int debug);
 
-extern const struct nv50_disp_mthd_chan nv50_disp_core_mthd_chan;
 extern const struct nv50_disp_mthd_list nv50_disp_core_mthd_base;
 extern const struct nv50_disp_mthd_list nv50_disp_core_mthd_sor;
 extern const struct nv50_disp_mthd_list nv50_disp_core_mthd_pior;
-extern const struct nv50_disp_mthd_chan nv50_disp_base_mthd_chan;
 extern const struct nv50_disp_mthd_list nv50_disp_base_mthd_image;
-extern const struct nv50_disp_mthd_chan nv50_disp_ovly_mthd_chan;
-extern const struct nv50_disp_mthd_list nv50_disp_ovly_mthd_base;
 
-extern const struct nv50_disp_mthd_chan g84_disp_core_mthd_chan;
+extern const struct nv50_disp_chan_mthd g84_disp_core_chan_mthd;
 extern const struct nv50_disp_mthd_list g84_disp_core_mthd_dac;
 extern const struct nv50_disp_mthd_list g84_disp_core_mthd_head;
-extern const struct nv50_disp_mthd_chan g84_disp_base_mthd_chan;
-extern const struct nv50_disp_mthd_chan g84_disp_ovly_mthd_chan;
-
-extern const struct nv50_disp_mthd_chan g94_disp_core_mthd_chan;
+extern const struct nv50_disp_chan_mthd g84_disp_base_chan_mthd;
+extern const struct nv50_disp_chan_mthd g84_disp_ovly_chan_mthd;
 
-extern const struct nv50_disp_mthd_chan gt200_disp_ovly_mthd_chan;
+extern const struct nv50_disp_chan_mthd g94_disp_core_chan_mthd;
 
-extern const struct nv50_disp_mthd_chan gf119_disp_core_mthd_chan;
 extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_base;
 extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_dac;
 extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_sor;
 extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_pior;
-extern const struct nv50_disp_mthd_chan gf119_disp_base_mthd_chan;
-extern const struct nv50_disp_mthd_chan gf119_disp_ovly_mthd_chan;
+extern const struct nv50_disp_chan_mthd gf119_disp_base_chan_mthd;
+
+extern const struct nv50_disp_chan_mthd gk104_disp_core_chan_mthd;
+
+struct nv50_disp_pioc_oclass {
+	int (*ctor)(const struct nv50_disp_chan_func *,
+		    const struct nv50_disp_chan_mthd *,
+		    struct nv50_disp_root *, int chid,
+		    const struct nvkm_oclass *, void *data, u32 size,
+		    struct nvkm_object **);
+	struct nvkm_sclass base;
+	const struct nv50_disp_chan_func *func;
+	const struct nv50_disp_chan_mthd *mthd;
+	int chid;
+};
+
+extern const struct nv50_disp_pioc_oclass nv50_disp_oimm_oclass;
+extern const struct nv50_disp_pioc_oclass nv50_disp_curs_oclass;
+
+extern const struct nv50_disp_pioc_oclass g84_disp_oimm_oclass;
+extern const struct nv50_disp_pioc_oclass g84_disp_curs_oclass;
+
+extern const struct nv50_disp_pioc_oclass gt215_disp_oimm_oclass;
+extern const struct nv50_disp_pioc_oclass gt215_disp_curs_oclass;
+
+extern const struct nv50_disp_pioc_oclass gf119_disp_oimm_oclass;
+extern const struct nv50_disp_pioc_oclass gf119_disp_curs_oclass;
+
+extern const struct nv50_disp_pioc_oclass gk104_disp_oimm_oclass;
+extern const struct nv50_disp_pioc_oclass gk104_disp_curs_oclass;
+
 
-extern const struct nv50_disp_mthd_chan gk104_disp_core_mthd_chan;
-extern const struct nv50_disp_mthd_chan gk104_disp_ovly_mthd_chan;
+int nv50_disp_curs_new(const struct nv50_disp_chan_func *,
+		       const struct nv50_disp_chan_mthd *,
+		       struct nv50_disp_root *, int chid,
+		       const struct nvkm_oclass *, void *data, u32 size,
+		       struct nvkm_object **);
+int nv50_disp_oimm_new(const struct nv50_disp_chan_func *,
+		       const struct nv50_disp_chan_mthd *,
+		       struct nv50_disp_root *, int chid,
+		       const struct nvkm_oclass *, void *data, u32 size,
+		       struct nvkm_object **);
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c
index 29b020f..1baa5c3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 const struct nv50_disp_mthd_list
 g84_disp_core_mthd_dac = {
@@ -87,10 +90,11 @@ g84_disp_core_mthd_head = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-g84_disp_core_mthd_chan = {
+const struct nv50_disp_chan_mthd
+g84_disp_core_chan_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &nv50_disp_core_mthd_base },
 		{    "DAC", 3, &g84_disp_core_mthd_dac  },
@@ -100,3 +104,14 @@ g84_disp_core_mthd_chan = {
 		{}
 	}
 };
+
+const struct nv50_disp_dmac_oclass
+g84_disp_core_oclass = {
+	.base.oclass = G82_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &nv50_disp_core_func,
+	.mthd = &g84_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c
index 8145525..019379a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 const struct nv50_disp_mthd_list
 g94_disp_core_mthd_sor = {
@@ -33,10 +36,11 @@ g94_disp_core_mthd_sor = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-g94_disp_core_mthd_chan = {
+const struct nv50_disp_chan_mthd
+g94_disp_core_chan_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &nv50_disp_core_mthd_base },
 		{    "DAC", 3, &g84_disp_core_mthd_dac  },
@@ -46,3 +50,14 @@ g94_disp_core_mthd_chan = {
 		{}
 	}
 };
+
+const struct nv50_disp_dmac_oclass
+g94_disp_core_oclass = {
+	.base.oclass = GT206_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &nv50_disp_core_func,
+	.mthd = &g94_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c
index 87f5c43..6b1dc70 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c
@@ -22,9 +22,14 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
 
+#include <core/client.h>
 #include <subdev/timer.h>
 
+#include <nvif/class.h>
+#include <nvif/unpack.h>
+
 const struct nv50_disp_mthd_list
 gf119_disp_core_mthd_base = {
 	.mthd = 0x0000,
@@ -151,10 +156,11 @@ gf119_disp_core_mthd_head = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-gf119_disp_core_mthd_chan = {
+static const struct nv50_disp_chan_mthd
+gf119_disp_core_chan_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
+	.prev = -0x020000,
 	.data = {
 		{ "Global", 1, &gf119_disp_core_mthd_base },
 		{    "DAC", 3, &gf119_disp_core_mthd_dac  },
@@ -165,11 +171,10 @@ gf119_disp_core_mthd_chan = {
 	}
 };
 
-static int
-gf119_disp_core_fini(struct nvkm_object *object, bool suspend)
+static void
+gf119_disp_core_fini(struct nv50_disp_dmac *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *mast = (void *)object;
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 
@@ -182,35 +187,25 @@ gf119_disp_core_fini(struct nvkm_object *object, bool suspend)
 	) < 0) {
 		nvkm_error(subdev, "core fini: %08x\n",
 			   nvkm_rd32(device, 0x610490));
-		if (suspend)
-			return -EBUSY;
 	}
 
 	/* disable error reporting and completion notification */
 	nvkm_mask(device, 0x610090, 0x00000001, 0x00000000);
 	nvkm_mask(device, 0x6100a0, 0x00000001, 0x00000000);
-
-	return nv50_disp_chan_fini(&mast->base, suspend);
 }
 
 static int
-gf119_disp_core_init(struct nvkm_object *object)
+gf119_disp_core_init(struct nv50_disp_dmac *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *mast = (void *)object;
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int ret;
-
-	ret = nv50_disp_chan_init(&mast->base);
-	if (ret)
-		return ret;
 
 	/* enable error reporting */
 	nvkm_mask(device, 0x6100a0, 0x00000001, 0x00000001);
 
 	/* initialise channel for dma command submission */
-	nvkm_wr32(device, 0x610494, mast->push);
+	nvkm_wr32(device, 0x610494, chan->push);
 	nvkm_wr32(device, 0x610498, 0x00010000);
 	nvkm_wr32(device, 0x61049c, 0x00000001);
 	nvkm_mask(device, 0x610490, 0x00000010, 0x00000010);
@@ -230,17 +225,20 @@ gf119_disp_core_init(struct nvkm_object *object)
 	return 0;
 }
 
-struct nv50_disp_chan_impl
-gf119_disp_core_ofuncs = {
-	.base.ctor = nv50_disp_core_ctor,
-	.base.dtor = nv50_disp_dmac_dtor,
-	.base.init = gf119_disp_core_init,
-	.base.fini = gf119_disp_core_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_dmac_func
+gf119_disp_core_func = {
+	.init = gf119_disp_core_init,
+	.fini = gf119_disp_core_fini,
+	.bind = gf119_disp_dmac_bind,
+};
+
+const struct nv50_disp_dmac_oclass
+gf119_disp_core_oclass = {
+	.base.oclass = GF110_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &gf119_disp_core_func,
+	.mthd = &gf119_disp_core_chan_mthd,
 	.chid = 0,
-	.attach = gf119_disp_dmac_object_attach,
-	.detach = gf119_disp_dmac_object_detach,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c
index 6662cc6..088ab22 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 gk104_disp_core_mthd_head = {
@@ -102,10 +105,11 @@ gk104_disp_core_mthd_head = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-gk104_disp_core_mthd_chan = {
+const struct nv50_disp_chan_mthd
+gk104_disp_core_chan_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
+	.prev = -0x020000,
 	.data = {
 		{ "Global", 1, &gf119_disp_core_mthd_base },
 		{    "DAC", 3, &gf119_disp_core_mthd_dac  },
@@ -115,3 +119,14 @@ gk104_disp_core_mthd_chan = {
 		{}
 	}
 };
+
+const struct nv50_disp_dmac_oclass
+gk104_disp_core_oclass = {
+	.base.oclass = GK104_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &gf119_disp_core_func,
+	.mthd = &gk104_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk110.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk110.c
new file mode 100644
index 0000000..df0f45c
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk110.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gk110_disp_core_oclass = {
+	.base.oclass = GK110_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &gf119_disp_core_func,
+	.mthd = &gk104_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm107.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm107.c
new file mode 100644
index 0000000..9e27f8f
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm107.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gm107_disp_core_oclass = {
+	.base.oclass = GM107_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &gf119_disp_core_func,
+	.mthd = &gk104_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm204.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm204.c
new file mode 100644
index 0000000..222f4a8
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm204.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gm204_disp_core_oclass = {
+	.base.oclass = GM204_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &gf119_disp_core_func,
+	.mthd = &gk104_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt200.c
new file mode 100644
index 0000000..b234547
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt200.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gt200_disp_core_oclass = {
+	.base.oclass = GT200_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &nv50_disp_core_func,
+	.mthd = &g84_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt215.c
new file mode 100644
index 0000000..8f5ba20
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt215.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gt215_disp_core_oclass = {
+	.base.oclass = GT214_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &nv50_disp_core_func,
+	.mthd = &g94_disp_core_chan_mthd,
+	.chid = 0,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c
index 624b795..db4a9b3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c
@@ -22,6 +22,7 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
 
 #include <core/client.h>
 #include <subdev/timer.h>
@@ -29,6 +30,33 @@
 #include <nvif/class.h>
 #include <nvif/unpack.h>
 
+int
+nv50_disp_core_new(const struct nv50_disp_dmac_func *func,
+		   const struct nv50_disp_chan_mthd *mthd,
+		   struct nv50_disp_root *root, int chid,
+		   const struct nvkm_oclass *oclass, void *data, u32 size,
+		   struct nvkm_object **pobject)
+{
+	union {
+		struct nv50_disp_core_channel_dma_v0 v0;
+	} *args = data;
+	struct nvkm_object *parent = oclass->parent;
+	u64 push;
+	int ret;
+
+	nvif_ioctl(parent, "create disp core channel dma size %d\n", size);
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		nvif_ioctl(parent, "create disp core channel dma vers %d "
+				   "pushbuf %016llx\n",
+			   args->v0.version, args->v0.pushbuf);
+		push = args->v0.pushbuf;
+	} else
+		return ret;
+
+	return nv50_disp_dmac_new_(func, mthd, root, chid, 0,
+				   push, oclass, pobject);
+}
+
 const struct nv50_disp_mthd_list
 nv50_disp_core_mthd_base = {
 	.mthd = 0x0000,
@@ -121,10 +149,11 @@ nv50_disp_core_mthd_head = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-nv50_disp_core_mthd_chan = {
+static const struct nv50_disp_chan_mthd
+nv50_disp_core_chan_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &nv50_disp_core_mthd_base },
 		{    "DAC", 3, &nv50_disp_core_mthd_dac  },
@@ -135,11 +164,10 @@ nv50_disp_core_mthd_chan = {
 	}
 };
 
-static int
-nv50_disp_core_fini(struct nvkm_object *object, bool suspend)
+static void
+nv50_disp_core_fini(struct nv50_disp_dmac *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *mast = (void *)object;
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 
@@ -152,28 +180,18 @@ nv50_disp_core_fini(struct nvkm_object *object, bool suspend)
 	) < 0) {
 		nvkm_error(subdev, "core fini: %08x\n",
 			   nvkm_rd32(device, 0x610200));
-		if (suspend)
-			return -EBUSY;
 	}
 
 	/* disable error reporting and completion notifications */
 	nvkm_mask(device, 0x610028, 0x00010001, 0x00000000);
-
-	return nv50_disp_chan_fini(&mast->base, suspend);
 }
 
 static int
-nv50_disp_core_init(struct nvkm_object *object)
+nv50_disp_core_init(struct nv50_disp_dmac *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *mast = (void *)object;
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int ret;
-
-	ret = nv50_disp_chan_init(&mast->base);
-	if (ret)
-		return ret;
 
 	/* enable error reporting */
 	nvkm_mask(device, 0x610028, 0x00010000, 0x00010000);
@@ -185,7 +203,7 @@ nv50_disp_core_init(struct nvkm_object *object)
 		nvkm_mask(device, 0x610200, 0x00600000, 0x00600000);
 
 	/* initialise channel for dma command submission */
-	nvkm_wr32(device, 0x610204, mast->push);
+	nvkm_wr32(device, 0x610204, chan->push);
 	nvkm_wr32(device, 0x610208, 0x00010000);
 	nvkm_wr32(device, 0x61020c, 0x00000000);
 	nvkm_mask(device, 0x610200, 0x00000010, 0x00000010);
@@ -205,46 +223,20 @@ nv50_disp_core_init(struct nvkm_object *object)
 	return 0;
 }
 
-int
-nv50_disp_core_ctor(struct nvkm_object *parent,
-		    struct nvkm_object *engine,
-		    struct nvkm_oclass *oclass, void *data, u32 size,
-		    struct nvkm_object **pobject)
-{
-	union {
-		struct nv50_disp_core_channel_dma_v0 v0;
-	} *args = data;
-	struct nv50_disp_dmac *mast;
-	int ret;
-
-	nvif_ioctl(parent, "create disp core channel dma size %d\n", size);
-	if (nvif_unpack(args->v0, 0, 0, false)) {
-		nvif_ioctl(parent, "create disp core channel dma vers %d "
-				   "pushbuf %016llx\n",
-			   args->v0.version, args->v0.pushbuf);
-	} else
-		return ret;
-
-	ret = nv50_disp_dmac_create_(parent, engine, oclass, args->v0.pushbuf,
-				     0, sizeof(*mast), (void **)&mast);
-	*pobject = nv_object(mast);
-	if (ret)
-		return ret;
-
-	return 0;
-}
+const struct nv50_disp_dmac_func
+nv50_disp_core_func = {
+	.init = nv50_disp_core_init,
+	.fini = nv50_disp_core_fini,
+	.bind = nv50_disp_dmac_bind,
+};
 
-struct nv50_disp_chan_impl
-nv50_disp_core_ofuncs = {
-	.base.ctor = nv50_disp_core_ctor,
-	.base.dtor = nv50_disp_dmac_dtor,
-	.base.init = nv50_disp_core_init,
-	.base.fini = nv50_disp_core_fini,
-	.base.map  = nv50_disp_chan_map,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_dmac_oclass
+nv50_disp_core_oclass = {
+	.base.oclass = NV50_DISP_CORE_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_core_new,
+	.func = &nv50_disp_core_func,
+	.mthd = &nv50_disp_core_chan_mthd,
 	.chid = 0,
-	.attach = nv50_disp_dmac_object_attach,
-	.detach = nv50_disp_dmac_object_detach,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursg84.c
new file mode 100644
index 0000000..dd99fc7
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursg84.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "channv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+g84_disp_curs_oclass = {
+	.base.oclass = G82_DISP_CURSOR,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_curs_new,
+	.func = &nv50_disp_pioc_func,
+	.chid = 7,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgf119.c
index 5537a4a..2a1574e 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgf119.c
@@ -22,16 +22,16 @@
  * Authors: Ben Skeggs
  */
 #include "channv50.h"
+#include "rootnv50.h"
 
-struct nv50_disp_chan_impl
-gf119_disp_curs_ofuncs = {
-	.base.ctor = nv50_disp_curs_ctor,
-	.base.dtor = nv50_disp_pioc_dtor,
-	.base.init = gf119_disp_pioc_init,
-	.base.fini = gf119_disp_pioc_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+gf119_disp_curs_oclass = {
+	.base.oclass = GF110_DISP_CURSOR,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_curs_new,
+	.func = &gf119_disp_pioc_func,
 	.chid = 13,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgk104.c
new file mode 100644
index 0000000..28e8f06
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgk104.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "channv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+gk104_disp_curs_oclass = {
+	.base.oclass = GK104_DISP_CURSOR,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_curs_new,
+	.func = &gf119_disp_pioc_func,
+	.chid = 13,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgt215.c
new file mode 100644
index 0000000..d8a4b9c
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgt215.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "channv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+gt215_disp_curs_oclass = {
+	.base.oclass = GT214_DISP_CURSOR,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_curs_new,
+	.func = &nv50_disp_pioc_func,
+	.chid = 7,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursnv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursnv50.c
index 2b4e877..f3ce583 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursnv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/cursnv50.c
@@ -22,6 +22,7 @@
  * Authors: Ben Skeggs
  */
 #include "channv50.h"
+#include "rootnv50.h"
 
 #include <core/client.h>
 
@@ -29,17 +30,18 @@
 #include <nvif/unpack.h>
 
 int
-nv50_disp_curs_ctor(struct nvkm_object *parent,
-		    struct nvkm_object *engine,
-		    struct nvkm_oclass *oclass, void *data, u32 size,
-		    struct nvkm_object **pobject)
+nv50_disp_curs_new(const struct nv50_disp_chan_func *func,
+		   const struct nv50_disp_chan_mthd *mthd,
+		   struct nv50_disp_root *root, int chid,
+		   const struct nvkm_oclass *oclass, void *data, u32 size,
+		   struct nvkm_object **pobject)
 {
 	union {
 		struct nv50_disp_cursor_v0 v0;
 	} *args = data;
-	struct nv50_disp *disp = (void *)engine;
-	struct nv50_disp_pioc *pioc;
-	int ret;
+	struct nvkm_object *parent = oclass->parent;
+	struct nv50_disp *disp = root->disp;
+	int head, ret;
 
 	nvif_ioctl(parent, "create disp cursor size %d\n", size);
 	if (nvif_unpack(args->v0, 0, 0, false)) {
@@ -47,27 +49,20 @@ nv50_disp_curs_ctor(struct nvkm_object *parent,
 			   args->v0.version, args->v0.head);
 		if (args->v0.head > disp->head.nr)
 			return -EINVAL;
+		head = args->v0.head;
 	} else
 		return ret;
 
-	ret = nv50_disp_pioc_create_(parent, engine, oclass, args->v0.head,
-				     sizeof(*pioc), (void **)&pioc);
-	*pobject = nv_object(pioc);
-	if (ret)
-		return ret;
-
-	return 0;
+	return nv50_disp_chan_new_(func, mthd, root, chid + head,
+				   head, oclass, pobject);
 }
 
-struct nv50_disp_chan_impl
-nv50_disp_curs_ofuncs = {
-	.base.ctor = nv50_disp_curs_ctor,
-	.base.dtor = nv50_disp_pioc_dtor,
-	.base.init = nv50_disp_pioc_init,
-	.base.fini = nv50_disp_pioc_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_pioc_oclass
+nv50_disp_curs_oclass = {
+	.base.oclass = NV50_DISP_CURSOR,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_curs_new,
+	.func = &nv50_disp_pioc_func,
 	.chid = 7,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacgf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacgf119.c
index 6add32f..876b145 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacgf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacgf119.c
@@ -27,32 +27,22 @@
 #include <core/ramht.h>
 #include <subdev/timer.h>
 
-void
-gf119_disp_dmac_object_detach(struct nvkm_object *parent, int cookie)
-{
-	struct nv50_disp_root *root = (void *)parent->parent;
-	nvkm_ramht_remove(root->ramht, cookie);
-}
-
 int
-gf119_disp_dmac_object_attach(struct nvkm_object *parent,
-			      struct nvkm_object *object, u32 name)
+gf119_disp_dmac_bind(struct nv50_disp_dmac *chan,
+		     struct nvkm_object *object, u32 handle)
 {
-	struct nv50_disp_root *root = (void *)parent->parent;
-	struct nv50_disp_chan *chan = (void *)parent;
-	u32 addr = nv_gpuobj(object)->node->offset;
-	u32 data = (chan->chid << 27) | (addr << 9) | 0x00000001;
-	return nvkm_ramht_insert(root->ramht, NULL, chan->chid, 0, name, data);
+	return nvkm_ramht_insert(chan->base.root->ramht, object,
+				 chan->base.chid, -9, handle,
+				 chan->base.chid << 27 | 0x00000001);
 }
 
-int
-gf119_disp_dmac_fini(struct nvkm_object *object, bool suspend)
+static void
+gf119_disp_dmac_fini(struct nv50_disp_dmac *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *dmac = (void *)object;
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = dmac->base.chid;
+	int chid = chan->base.chid;
 
 	/* deactivate channel */
 	nvkm_mask(device, 0x610490 + (chid * 0x0010), 0x00001010, 0x00001000);
@@ -63,36 +53,26 @@ gf119_disp_dmac_fini(struct nvkm_object *object, bool suspend)
 	) < 0) {
 		nvkm_error(subdev, "ch %d fini: %08x\n", chid,
 			   nvkm_rd32(device, 0x610490 + (chid * 0x10)));
-		if (suspend)
-			return -EBUSY;
 	}
 
 	/* disable error reporting and completion notification */
 	nvkm_mask(device, 0x610090, 0x00000001 << chid, 0x00000000);
 	nvkm_mask(device, 0x6100a0, 0x00000001 << chid, 0x00000000);
-
-	return nv50_disp_chan_fini(&dmac->base, suspend);
 }
 
-int
-gf119_disp_dmac_init(struct nvkm_object *object)
+static int
+gf119_disp_dmac_init(struct nv50_disp_dmac *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *dmac = (void *)object;
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = dmac->base.chid;
-	int ret;
-
-	ret = nv50_disp_chan_init(&dmac->base);
-	if (ret)
-		return ret;
+	int chid = chan->base.chid;
 
 	/* enable error reporting */
 	nvkm_mask(device, 0x6100a0, 0x00000001 << chid, 0x00000001 << chid);
 
 	/* initialise channel for dma command submission */
-	nvkm_wr32(device, 0x610494 + (chid * 0x0010), dmac->push);
+	nvkm_wr32(device, 0x610494 + (chid * 0x0010), chan->push);
 	nvkm_wr32(device, 0x610498 + (chid * 0x0010), 0x00010000);
 	nvkm_wr32(device, 0x61049c + (chid * 0x0010), 0x00000001);
 	nvkm_mask(device, 0x610490 + (chid * 0x0010), 0x00000010, 0x00000010);
@@ -111,3 +91,10 @@ gf119_disp_dmac_init(struct nvkm_object *object)
 
 	return 0;
 }
+
+const struct nv50_disp_dmac_func
+gf119_disp_dmac_func = {
+	.init = gf119_disp_dmac_init,
+	.fini = gf119_disp_dmac_fini,
+	.bind = gf119_disp_dmac_bind,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.c
index 43c17d0..9ad9512 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.c
@@ -26,38 +26,172 @@
 
 #include <core/client.h>
 #include <core/handle.h>
+#include <core/oproxy.h>
 #include <core/ramht.h>
 #include <subdev/fb.h>
 #include <subdev/timer.h>
 #include <engine/dma.h>
 
-void
-nv50_disp_dmac_object_detach(struct nvkm_object *parent, int cookie)
+struct nv50_disp_dmac_object {
+	struct nvkm_oproxy oproxy;
+	struct nv50_disp_root *root;
+	int hash;
+};
+
+static void
+nv50_disp_dmac_child_del_(struct nvkm_oproxy *base)
+{
+	struct nv50_disp_dmac_object *object =
+		container_of(base, typeof(*object), oproxy);
+	nvkm_ramht_remove(object->root->ramht, object->hash);
+}
+
+static const struct nvkm_oproxy_func
+nv50_disp_dmac_child_func_ = {
+	.dtor[0] = nv50_disp_dmac_child_del_,
+};
+
+static int
+nv50_disp_dmac_child_new_(struct nv50_disp_chan *base,
+			  const struct nvkm_oclass *oclass,
+			  void *data, u32 size, struct nvkm_object **pobject)
+{
+	struct nv50_disp_dmac *chan = nv50_disp_dmac(base);
+	struct nv50_disp_root *root = chan->base.root;
+	struct nvkm_device *device = root->disp->base.engine.subdev.device;
+	const struct nvkm_device_oclass *sclass = oclass->priv;
+	struct nv50_disp_dmac_object *object;
+	int ret;
+
+	if (!(object = kzalloc(sizeof(*object), GFP_KERNEL)))
+		return -ENOMEM;
+	nvkm_oproxy_ctor(&nv50_disp_dmac_child_func_, oclass, &object->oproxy);
+	object->root = root;
+	*pobject = &object->oproxy.base;
+
+	ret = sclass->ctor(device, oclass, data, size, &object->oproxy.object);
+	if (ret)
+		return ret;
+
+	object->hash = chan->func->bind(chan, object->oproxy.object,
+					      oclass->handle);
+	if (object->hash < 0)
+		return object->hash;
+
+	return 0;
+}
+
+static int
+nv50_disp_dmac_child_get_(struct nv50_disp_chan *base, int index,
+			  struct nvkm_oclass *sclass)
+{
+	struct nv50_disp_dmac *chan = nv50_disp_dmac(base);
+	struct nv50_disp *disp = chan->base.root->disp;
+	struct nvkm_device *device = disp->base.engine.subdev.device;
+	const struct nvkm_device_oclass *oclass = NULL;
+
+	sclass->engine = nvkm_device_engine(device, NVDEV_ENGINE_DMAOBJ);
+	if (sclass->engine && sclass->engine->func->base.sclass) {
+		sclass->engine->func->base.sclass(sclass, index, &oclass);
+		if (oclass) {
+			sclass->priv = oclass;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static void
+nv50_disp_dmac_fini_(struct nv50_disp_chan *base)
+{
+	struct nv50_disp_dmac *chan = nv50_disp_dmac(base);
+	chan->func->fini(chan);
+}
+
+static int
+nv50_disp_dmac_init_(struct nv50_disp_chan *base)
+{
+	struct nv50_disp_dmac *chan = nv50_disp_dmac(base);
+	return chan->func->init(chan);
+}
+
+static void *
+nv50_disp_dmac_dtor_(struct nv50_disp_chan *base)
 {
-	struct nv50_disp_root *root = (void *)parent->parent;
-	nvkm_ramht_remove(root->ramht, cookie);
+	return nv50_disp_dmac(base);
 }
 
+static const struct nv50_disp_chan_func
+nv50_disp_dmac_func_ = {
+	.dtor = nv50_disp_dmac_dtor_,
+	.init = nv50_disp_dmac_init_,
+	.fini = nv50_disp_dmac_fini_,
+	.child_get = nv50_disp_dmac_child_get_,
+	.child_new = nv50_disp_dmac_child_new_,
+};
+
 int
-nv50_disp_dmac_object_attach(struct nvkm_object *parent,
-			     struct nvkm_object *object, u32 name)
+nv50_disp_dmac_new_(const struct nv50_disp_dmac_func *func,
+		    const struct nv50_disp_chan_mthd *mthd,
+		    struct nv50_disp_root *root, int chid, int head, u64 push,
+		    const struct nvkm_oclass *oclass,
+		    struct nvkm_object **pobject)
 {
-	struct nv50_disp_root *root = (void *)parent->parent;
-	struct nv50_disp_chan *chan = (void *)parent;
-	u32 addr = nv_gpuobj(object)->node->offset;
-	u32 chid = chan->chid;
-	u32 data = (chid << 28) | (addr << 10) | chid;
-	return nvkm_ramht_insert(root->ramht, NULL, chid, 0, name, data);
+	struct nvkm_device *device = root->disp->base.engine.subdev.device;
+	struct nvkm_client *client = oclass->client;
+	struct nvkm_dmaobj *dmaobj;
+	struct nv50_disp_dmac *chan;
+	int ret;
+
+	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
+		return -ENOMEM;
+	*pobject = &chan->base.object;
+	chan->func = func;
+
+	ret = nv50_disp_chan_ctor(&nv50_disp_dmac_func_, mthd, root,
+				  chid, head, oclass, &chan->base);
+	if (ret)
+		return ret;
+
+	dmaobj = nvkm_dma_search(device->dma, client, push);
+	if (!dmaobj)
+		return -ENOENT;
+
+	if (dmaobj->limit - dmaobj->start != 0xfff)
+		return -EINVAL;
+
+	switch (dmaobj->target) {
+	case NV_MEM_TARGET_VRAM:
+		chan->push = 0x00000001 | dmaobj->start >> 8;
+		break;
+	case NV_MEM_TARGET_PCI_NOSNOOP:
+		chan->push = 0x00000003 | dmaobj->start >> 8;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
 int
-nv50_disp_dmac_fini(struct nvkm_object *object, bool suspend)
+nv50_disp_dmac_bind(struct nv50_disp_dmac *chan,
+		    struct nvkm_object *object, u32 handle)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *dmac = (void *)object;
+	return nvkm_ramht_insert(chan->base.root->ramht, object,
+				 chan->base.chid, -10, handle,
+				 chan->base.chid << 28 |
+				 chan->base.chid);
+}
+
+static void
+nv50_disp_dmac_fini(struct nv50_disp_dmac *chan)
+{
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = dmac->base.chid;
+	int chid = chan->base.chid;
 
 	/* deactivate channel */
 	nvkm_mask(device, 0x610200 + (chid * 0x0010), 0x00001010, 0x00001000);
@@ -68,35 +202,25 @@ nv50_disp_dmac_fini(struct nvkm_object *object, bool suspend)
 	) < 0) {
 		nvkm_error(subdev, "ch %d fini timeout, %08x\n", chid,
 			   nvkm_rd32(device, 0x610200 + (chid * 0x10)));
-		if (suspend)
-			return -EBUSY;
 	}
 
 	/* disable error reporting and completion notifications */
 	nvkm_mask(device, 0x610028, 0x00010001 << chid, 0x00000000 << chid);
-
-	return nv50_disp_chan_fini(&dmac->base, suspend);
 }
 
-int
-nv50_disp_dmac_init(struct nvkm_object *object)
+static int
+nv50_disp_dmac_init(struct nv50_disp_dmac *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_dmac *dmac = (void *)object;
+	struct nv50_disp *disp = chan->base.root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = dmac->base.chid;
-	int ret;
-
-	ret = nv50_disp_chan_init(&dmac->base);
-	if (ret)
-		return ret;
+	int chid = chan->base.chid;
 
 	/* enable error reporting */
 	nvkm_mask(device, 0x610028, 0x00010000 << chid, 0x00010000 << chid);
 
 	/* initialise channel for dma command submission */
-	nvkm_wr32(device, 0x610204 + (chid * 0x0010), dmac->push);
+	nvkm_wr32(device, 0x610204 + (chid * 0x0010), chan->push);
 	nvkm_wr32(device, 0x610208 + (chid * 0x0010), 0x00010000);
 	nvkm_wr32(device, 0x61020c + (chid * 0x0010), chid);
 	nvkm_mask(device, 0x610200 + (chid * 0x0010), 0x00000010, 0x00000010);
@@ -116,48 +240,9 @@ nv50_disp_dmac_init(struct nvkm_object *object)
 	return 0;
 }
 
-void
-nv50_disp_dmac_dtor(struct nvkm_object *object)
-{
-	struct nv50_disp_dmac *dmac = (void *)object;
-	nv50_disp_chan_destroy(&dmac->base);
-}
-
-int
-nv50_disp_dmac_create_(struct nvkm_object *parent,
-		       struct nvkm_object *engine,
-		       struct nvkm_oclass *oclass, u64 pushbuf, int head,
-		       int length, void **pobject)
-{
-	struct nvkm_device *device = parent->engine->subdev.device;
-	struct nvkm_client *client = nvkm_client(parent);
-	struct nvkm_dmaobj *dmaobj;
-	struct nv50_disp_dmac *dmac;
-	int ret;
-
-	ret = nv50_disp_chan_create_(parent, engine, oclass, head,
-				     length, pobject);
-	dmac = *pobject;
-	if (ret)
-		return ret;
-
-	dmaobj = nvkm_dma_search(device->dma, client, pushbuf);
-	if (!dmaobj)
-		return -ENOENT;
-
-	if (dmaobj->limit - dmaobj->start != 0xfff)
-		return -EINVAL;
-
-	switch (dmaobj->target) {
-	case NV_MEM_TARGET_VRAM:
-		dmac->push = 0x00000001 | dmaobj->start >> 8;
-		break;
-	case NV_MEM_TARGET_PCI_NOSNOOP:
-		dmac->push = 0x00000003 | dmaobj->start >> 8;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
+const struct nv50_disp_dmac_func
+nv50_disp_dmac_func = {
+	.init = nv50_disp_dmac_init,
+	.fini = nv50_disp_dmac_fini,
+	.bind = nv50_disp_dmac_bind,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h
index cfd09d2..c748ca2 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h
@@ -1,24 +1,91 @@
 #ifndef __NV50_DISP_DMAC_H__
 #define __NV50_DISP_DMAC_H__
+#define nv50_disp_dmac(p) container_of((p), struct nv50_disp_dmac, base)
 #include "channv50.h"
 
 struct nv50_disp_dmac {
+	const struct nv50_disp_dmac_func *func;
 	struct nv50_disp_chan base;
 	u32 push;
 };
 
-void nv50_disp_dmac_dtor(struct nvkm_object *);
-int  nv50_disp_dmac_object_attach(struct nvkm_object *,
-				  struct nvkm_object *, u32);
-void nv50_disp_dmac_object_detach(struct nvkm_object *, int);
-int  nv50_disp_dmac_create_(struct nvkm_object *, struct nvkm_object *,
-			    struct nvkm_oclass *, u64, int, int, void **);
-int  nv50_disp_dmac_init(struct nvkm_object *);
-int  nv50_disp_dmac_fini(struct nvkm_object *, bool);
-
-int  gf119_disp_dmac_object_attach(struct nvkm_object *,
-				   struct nvkm_object *, u32);
-void gf119_disp_dmac_object_detach(struct nvkm_object *, int);
-int  gf119_disp_dmac_init(struct nvkm_object *);
-int  gf119_disp_dmac_fini(struct nvkm_object *, bool);
+struct nv50_disp_dmac_func {
+	int  (*init)(struct nv50_disp_dmac *);
+	void (*fini)(struct nv50_disp_dmac *);
+	int  (*bind)(struct nv50_disp_dmac *, struct nvkm_object *, u32 handle);
+};
+
+int nv50_disp_dmac_new_(const struct nv50_disp_dmac_func *,
+			const struct nv50_disp_chan_mthd *,
+			struct nv50_disp_root *, int chid, int head, u64 push,
+			const struct nvkm_oclass *, struct nvkm_object **);
+
+extern const struct nv50_disp_dmac_func nv50_disp_dmac_func;
+int nv50_disp_dmac_bind(struct nv50_disp_dmac *, struct nvkm_object *, u32);
+extern const struct nv50_disp_dmac_func nv50_disp_core_func;
+
+extern const struct nv50_disp_dmac_func gf119_disp_dmac_func;
+int gf119_disp_dmac_bind(struct nv50_disp_dmac *, struct nvkm_object *, u32);
+extern const struct nv50_disp_dmac_func gf119_disp_core_func;
+
+struct nv50_disp_dmac_oclass {
+	int (*ctor)(const struct nv50_disp_dmac_func *,
+		    const struct nv50_disp_chan_mthd *,
+		    struct nv50_disp_root *, int chid,
+		    const struct nvkm_oclass *, void *data, u32 size,
+		    struct nvkm_object **);
+	struct nvkm_sclass base;
+	const struct nv50_disp_dmac_func *func;
+	const struct nv50_disp_chan_mthd *mthd;
+	int chid;
+};
+
+int nv50_disp_core_new(const struct nv50_disp_dmac_func *,
+		       const struct nv50_disp_chan_mthd *,
+		       struct nv50_disp_root *, int chid,
+		       const struct nvkm_oclass *oclass, void *data, u32 size,
+		       struct nvkm_object **);
+int nv50_disp_base_new(const struct nv50_disp_dmac_func *,
+		       const struct nv50_disp_chan_mthd *,
+		       struct nv50_disp_root *, int chid,
+		       const struct nvkm_oclass *oclass, void *data, u32 size,
+		       struct nvkm_object **);
+int nv50_disp_ovly_new(const struct nv50_disp_dmac_func *,
+		       const struct nv50_disp_chan_mthd *,
+		       struct nv50_disp_root *, int chid,
+		       const struct nvkm_oclass *oclass, void *data, u32 size,
+		       struct nvkm_object **);
+
+extern const struct nv50_disp_dmac_oclass nv50_disp_core_oclass;
+extern const struct nv50_disp_dmac_oclass nv50_disp_base_oclass;
+extern const struct nv50_disp_dmac_oclass nv50_disp_ovly_oclass;
+
+extern const struct nv50_disp_dmac_oclass g84_disp_core_oclass;
+extern const struct nv50_disp_dmac_oclass g84_disp_base_oclass;
+extern const struct nv50_disp_dmac_oclass g84_disp_ovly_oclass;
+
+extern const struct nv50_disp_dmac_oclass g94_disp_core_oclass;
+
+extern const struct nv50_disp_dmac_oclass gt200_disp_core_oclass;
+extern const struct nv50_disp_dmac_oclass gt200_disp_base_oclass;
+extern const struct nv50_disp_dmac_oclass gt200_disp_ovly_oclass;
+
+extern const struct nv50_disp_dmac_oclass gt215_disp_core_oclass;
+extern const struct nv50_disp_dmac_oclass gt215_disp_base_oclass;
+extern const struct nv50_disp_dmac_oclass gt215_disp_ovly_oclass;
+
+extern const struct nv50_disp_dmac_oclass gf119_disp_core_oclass;
+extern const struct nv50_disp_dmac_oclass gf119_disp_base_oclass;
+extern const struct nv50_disp_dmac_oclass gf119_disp_ovly_oclass;
+
+extern const struct nv50_disp_dmac_oclass gk104_disp_core_oclass;
+extern const struct nv50_disp_dmac_oclass gk104_disp_base_oclass;
+extern const struct nv50_disp_dmac_oclass gk104_disp_ovly_oclass;
+
+extern const struct nv50_disp_dmac_oclass gk110_disp_core_oclass;
+extern const struct nv50_disp_dmac_oclass gk110_disp_base_oclass;
+
+extern const struct nv50_disp_dmac_oclass gm107_disp_core_oclass;
+
+extern const struct nv50_disp_dmac_oclass gm204_disp_core_oclass;
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/g84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/g84.c
index 5995bca..a223cef 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/g84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/g84.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+g84_disp = {
+	.root = &g84_disp_root_oclass,
+};
+
 static int
 g84_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	      struct nvkm_oclass *oclass, void *data, u32 size,
@@ -38,15 +43,14 @@ g84_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &g84_disp;
+
 	ret = nvkm_event_init(&nv50_disp_chan_uevent, 1, 9, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = g84_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = nv50_disp_intr;
 	INIT_WORK(&disp->supervisor, nv50_disp_intr_supervisor);
-	disp->sclass = g84_disp_sclass;
 	disp->head.nr = 2;
 	disp->dac.nr = 3;
 	disp->sor.nr = 2;
@@ -74,9 +78,5 @@ g84_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.external.tmds = nv50_pior_output_new,
 	.base.outp.external.dp = nv50_pior_dp_new,
 	.base.vblank = &nv50_disp_vblank_func,
-	.mthd.core = &g84_disp_core_mthd_chan,
-	.mthd.base = &g84_disp_base_mthd_chan,
-	.mthd.ovly = &g84_disp_ovly_mthd_chan,
-	.mthd.prev = 0x000004,
 	.head.scanoutpos = nv50_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/g94.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/g94.c
index 0247090..639b02b 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/g94.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/g94.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+g94_disp = {
+	.root = &g94_disp_root_oclass,
+};
+
 static int
 g94_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	      struct nvkm_oclass *oclass, void *data, u32 size,
@@ -38,15 +43,14 @@ g94_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &g94_disp;
+
 	ret = nvkm_event_init(&nv50_disp_chan_uevent, 1, 9, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = g94_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = nv50_disp_intr;
 	INIT_WORK(&disp->supervisor, nv50_disp_intr_supervisor);
-	disp->sclass = g94_disp_sclass;
 	disp->head.nr = 2;
 	disp->dac.nr = 3;
 	disp->sor.nr = 4;
@@ -75,9 +79,5 @@ g94_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.external.lvds = nv50_pior_output_new,
 	.base.outp.external.dp = nv50_pior_dp_new,
 	.base.vblank = &nv50_disp_vblank_func,
-	.mthd.core = &g94_disp_core_mthd_chan,
-	.mthd.base = &g84_disp_base_mthd_chan,
-	.mthd.ovly = &g84_disp_ovly_mthd_chan,
-	.mthd.prev = 0x000004,
 	.head.scanoutpos = nv50_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c
index 154185a..c3d22e3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c
@@ -370,7 +370,6 @@ gf119_disp_intr_supervisor(struct work_struct *work)
 {
 	struct nv50_disp *disp =
 		container_of(work, struct nv50_disp, supervisor);
-	struct nv50_disp_impl *impl = (void *)nv_object(disp)->oclass;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 mask[4];
@@ -383,7 +382,7 @@ gf119_disp_intr_supervisor(struct work_struct *work)
 	}
 
 	if (disp->super & 0x00000001) {
-		nv50_disp_mthd_chan(disp, NV_DBG_DEBUG, 0, impl->mthd.core);
+		nv50_disp_chan_mthd(disp->chan[0], NV_DBG_DEBUG);
 		for (head = 0; head < disp->head.nr; head++) {
 			if (!(mask[head] & 0x00001000))
 				continue;
@@ -428,7 +427,6 @@ gf119_disp_intr_supervisor(struct work_struct *work)
 static void
 gf119_disp_intr_error(struct nv50_disp *disp, int chid)
 {
-	const struct nv50_disp_impl *impl = (void *)nv_object(disp)->oclass;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 mthd = nvkm_rd32(device, 0x6101f0 + (chid * 12));
@@ -438,31 +436,10 @@ gf119_disp_intr_error(struct nv50_disp *disp, int chid)
 	nvkm_error(subdev, "chid %d mthd %04x data %08x %08x %08x\n",
 		   chid, (mthd & 0x0000ffc), data, mthd, unkn);
 
-	if (chid == 0) {
+	if (chid < ARRAY_SIZE(disp->chan)) {
 		switch (mthd & 0xffc) {
 		case 0x0080:
-			nv50_disp_mthd_chan(disp, NV_DBG_ERROR, chid - 0,
-					    impl->mthd.core);
-			break;
-		default:
-			break;
-		}
-	} else
-	if (chid <= 4) {
-		switch (mthd & 0xffc) {
-		case 0x0080:
-			nv50_disp_mthd_chan(disp, NV_DBG_ERROR, chid - 1,
-					    impl->mthd.base);
-			break;
-		default:
-			break;
-		}
-	} else
-	if (chid <= 8) {
-		switch (mthd & 0xffc) {
-		case 0x0080:
-			nv50_disp_mthd_chan(disp, NV_DBG_ERROR, chid - 5,
-					    impl->mthd.ovly);
+			nv50_disp_chan_mthd(disp->chan[chid], NV_DBG_ERROR);
 			break;
 		default:
 			break;
@@ -528,6 +505,11 @@ gf119_disp_intr(struct nvkm_subdev *subdev)
 	}
 }
 
+static const struct nvkm_disp_func
+gf119_disp = {
+	.root = &gf119_disp_root_oclass,
+};
+
 static int
 gf119_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 		struct nvkm_oclass *oclass, void *data, u32 size,
@@ -544,15 +526,14 @@ gf119_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &gf119_disp;
+
 	ret = nvkm_event_init(&gf119_disp_chan_uevent, 1, 17, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = gf119_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = gf119_disp_intr;
 	INIT_WORK(&disp->supervisor, gf119_disp_intr_supervisor);
-	disp->sclass = gf119_disp_sclass;
 	disp->head.nr = heads;
 	disp->dac.nr = 3;
 	disp->sor.nr = 4;
@@ -578,9 +559,5 @@ gf110_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.internal.lvds = nv50_sor_output_new,
 	.base.outp.internal.dp = gf119_sor_dp_new,
 	.base.vblank = &gf119_disp_vblank_func,
-	.mthd.core = &gf119_disp_core_mthd_chan,
-	.mthd.base = &gf119_disp_base_mthd_chan,
-	.mthd.ovly = &gf119_disp_ovly_mthd_chan,
-	.mthd.prev = -0x020000,
 	.head.scanoutpos = gf119_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk104.c
index 404c752..e478c9f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk104.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+gk104_disp = {
+	.root = &gk104_disp_root_oclass,
+};
+
 static int
 gk104_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 		struct nvkm_oclass *oclass, void *data, u32 size,
@@ -40,15 +45,14 @@ gk104_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &gk104_disp;
+
 	ret = nvkm_event_init(&gf119_disp_chan_uevent, 1, 17, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = gk104_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = gf119_disp_intr;
 	INIT_WORK(&disp->supervisor, gf119_disp_intr_supervisor);
-	disp->sclass = gk104_disp_sclass;
 	disp->head.nr = heads;
 	disp->dac.nr = 3;
 	disp->sor.nr = 4;
@@ -74,9 +78,5 @@ gk104_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.internal.lvds = nv50_sor_output_new,
 	.base.outp.internal.dp = gf119_sor_dp_new,
 	.base.vblank = &gf119_disp_vblank_func,
-	.mthd.core = &gk104_disp_core_mthd_chan,
-	.mthd.base = &gf119_disp_base_mthd_chan,
-	.mthd.ovly = &gk104_disp_ovly_mthd_chan,
-	.mthd.prev = -0x020000,
 	.head.scanoutpos = gf119_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk110.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk110.c
index 2bb3515..f4801f8 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk110.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gk110.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+gk110_disp = {
+	.root = &gk110_disp_root_oclass,
+};
+
 static int
 gk110_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 		struct nvkm_oclass *oclass, void *data, u32 size,
@@ -40,15 +45,14 @@ gk110_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &gk110_disp;
+
 	ret = nvkm_event_init(&gf119_disp_chan_uevent, 1, 17, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = gk110_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = gf119_disp_intr;
 	INIT_WORK(&disp->supervisor, gf119_disp_intr_supervisor);
-	disp->sclass = gk110_disp_sclass;
 	disp->head.nr = heads;
 	disp->dac.nr = 3;
 	disp->sor.nr = 4;
@@ -74,9 +78,5 @@ gk110_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.internal.lvds = nv50_sor_output_new,
 	.base.outp.internal.dp = gf119_sor_dp_new,
 	.base.vblank = &gf119_disp_vblank_func,
-	.mthd.core = &gk104_disp_core_mthd_chan,
-	.mthd.base = &gf119_disp_base_mthd_chan,
-	.mthd.ovly = &gk104_disp_ovly_mthd_chan,
-	.mthd.prev = -0x020000,
 	.head.scanoutpos = gf119_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm107.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm107.c
index fbc6b7c..a72f610 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm107.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm107.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+gm107_disp = {
+	.root = &gm107_disp_root_oclass,
+};
+
 static int
 gm107_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 		struct nvkm_oclass *oclass, void *data, u32 size,
@@ -40,15 +45,14 @@ gm107_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &gm107_disp;
+
 	ret = nvkm_event_init(&gf119_disp_chan_uevent, 1, 17, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = gm107_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = gf119_disp_intr;
 	INIT_WORK(&disp->supervisor, gf119_disp_intr_supervisor);
-	disp->sclass = gm107_disp_sclass;
 	disp->head.nr = heads;
 	disp->dac.nr = 3;
 	disp->sor.nr = 4;
@@ -74,9 +78,5 @@ gm107_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.internal.lvds = nv50_sor_output_new,
 	.base.outp.internal.dp = gf119_sor_dp_new,
 	.base.vblank = &gf119_disp_vblank_func,
-	.mthd.core = &gk104_disp_core_mthd_chan,
-	.mthd.base = &gf119_disp_base_mthd_chan,
-	.mthd.ovly = &gk104_disp_ovly_mthd_chan,
-	.mthd.prev = -0x020000,
 	.head.scanoutpos = gf119_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm204.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm204.c
index bf6ede5..363e939 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm204.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gm204.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+gm204_disp = {
+	.root = &gm204_disp_root_oclass,
+};
+
 static int
 gm204_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 		struct nvkm_oclass *oclass, void *data, u32 size,
@@ -40,15 +45,14 @@ gm204_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &gm204_disp;
+
 	ret = nvkm_event_init(&gf119_disp_chan_uevent, 1, 17, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = gm204_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = gf119_disp_intr;
 	INIT_WORK(&disp->supervisor, gf119_disp_intr_supervisor);
-	disp->sclass = gm204_disp_sclass;
 	disp->head.nr = heads;
 	disp->dac.nr = 3;
 	disp->sor.nr = 4;
@@ -75,9 +79,5 @@ gm204_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.internal.lvds = nv50_sor_output_new,
 	.base.outp.internal.dp = gm204_sor_dp_new,
 	.base.vblank = &gf119_disp_vblank_func,
-	.mthd.core = &gk104_disp_core_mthd_chan,
-	.mthd.base = &gf119_disp_base_mthd_chan,
-	.mthd.ovly = &gk104_disp_ovly_mthd_chan,
-	.mthd.prev = -0x020000,
 	.head.scanoutpos = gf119_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt200.c
index 811f092..c699c5f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt200.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+gt200_disp = {
+	.root = &gt200_disp_root_oclass,
+};
+
 static int
 gt200_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 		struct nvkm_oclass *oclass, void *data, u32 size,
@@ -38,15 +43,14 @@ gt200_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &gt200_disp;
+
 	ret = nvkm_event_init(&nv50_disp_chan_uevent, 1, 9, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = gt200_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = nv50_disp_intr;
 	INIT_WORK(&disp->supervisor, nv50_disp_intr_supervisor);
-	disp->sclass = gt200_disp_sclass;
 	disp->head.nr = 2;
 	disp->dac.nr = 3;
 	disp->sor.nr = 2;
@@ -74,9 +78,5 @@ gt200_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.external.tmds = nv50_pior_output_new,
 	.base.outp.external.dp = nv50_pior_dp_new,
 	.base.vblank = &nv50_disp_vblank_func,
-	.mthd.core = &g84_disp_core_mthd_chan,
-	.mthd.base = &g84_disp_base_mthd_chan,
-	.mthd.ovly = &gt200_disp_ovly_mthd_chan,
-	.mthd.prev = 0x000004,
 	.head.scanoutpos = nv50_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt215.c
index fdde7ce..ddf6590 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt215.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gt215.c
@@ -24,6 +24,11 @@
 #include "nv50.h"
 #include "rootnv50.h"
 
+static const struct nvkm_disp_func
+gt215_disp_func = {
+	.root = &gt215_disp_root_oclass,
+};
+
 static int
 gt215_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 		struct nvkm_oclass *oclass, void *data, u32 size,
@@ -38,15 +43,14 @@ gt215_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &gt215_disp_func;
+
 	ret = nvkm_event_init(&nv50_disp_chan_uevent, 1, 9, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = gt215_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = nv50_disp_intr;
 	INIT_WORK(&disp->supervisor, nv50_disp_intr_supervisor);
-	disp->sclass = gt215_disp_sclass;
 	disp->head.nr = 2;
 	disp->dac.nr = 3;
 	disp->sor.nr = 4;
@@ -76,9 +80,5 @@ gt215_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.external.lvds = nv50_pior_output_new,
 	.base.outp.external.dp = nv50_pior_dp_new,
 	.base.vblank = &nv50_disp_vblank_func,
-	.mthd.core = &g94_disp_core_mthd_chan,
-	.mthd.base = &g84_disp_base_mthd_chan,
-	.mthd.ovly = &g84_disp_ovly_mthd_chan,
-	.mthd.prev = 0x000004,
 	.head.scanoutpos = nv50_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv04.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv04.c
index ceac0c0..33922f3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv04.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv04.c
@@ -74,6 +74,11 @@ nv04_disp_intr(struct nvkm_subdev *subdev)
 	}
 }
 
+static const struct nvkm_disp_func
+nv04_disp = {
+	.root = &nv04_disp_root_oclass,
+};
+
 static int
 nv04_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	       struct nvkm_oclass *oclass, void *data, u32 size,
@@ -88,7 +93,8 @@ nv04_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = nv04_disp_sclass;
+	disp->func = &nv04_disp;
+
 	nv_subdev(disp)->intr = nv04_disp_intr;
 	return 0;
 }
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
index 240a543..9bc4273 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
@@ -33,47 +33,6 @@
 #include <subdev/bios/pll.h>
 #include <subdev/devinit.h>
 
-static int
-nv50_disp_data_ctor(struct nvkm_object *parent,
-		    struct nvkm_object *engine,
-		    struct nvkm_oclass *oclass, void *data, u32 size,
-		    struct nvkm_object **pobject)
-{
-	struct nv50_disp *disp = (void *)engine;
-	struct nvkm_gpuobj *gpuobj;
-	int ret;
-
-	/* no context needed for channel objects... */
-	if (parent->parent != &nvkm_client(parent)->object) {
-		atomic_inc(&parent->refcount);
-		*pobject = parent;
-		return 1;
-	}
-
-	/* allocate display hardware to client */
-	ret = nvkm_gpuobj_create(parent, engine, oclass, 0, NULL,
-				 0x10000, 0x10000, NVOBJ_FLAG_HEAP,
-				 &gpuobj);
-	*pobject = nv_object(gpuobj);
-	mutex_lock(&nv_subdev(disp)->mutex);
-	if (!list_empty(&nv_engine(disp)->contexts))
-		ret = -EBUSY;
-	mutex_unlock(&nv_subdev(disp)->mutex);
-	return ret;
-}
-
-struct nvkm_oclass
-nv50_disp_cclass = {
-	.ofuncs = &(struct nvkm_ofuncs) {
-		.ctor = nv50_disp_data_ctor,
-		.dtor = _nvkm_gpuobj_dtor,
-		.init = _nvkm_gpuobj_init,
-		.fini = _nvkm_gpuobj_fini,
-		.rd32 = _nvkm_gpuobj_rd32,
-		.wr32 = _nvkm_gpuobj_wr32,
-	},
-};
-
 static void
 nv50_disp_vblank_fini(struct nvkm_event *event, int type, int head)
 {
@@ -115,7 +74,6 @@ nv50_disp_intr_error_code[] = {
 static void
 nv50_disp_intr_error(struct nv50_disp *disp, int chid)
 {
-	struct nv50_disp_impl *impl = (void *)nv_object(disp)->oclass;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 data = nvkm_rd32(device, 0x610084 + (chid * 0x08));
@@ -133,31 +91,10 @@ nv50_disp_intr_error(struct nv50_disp *disp, int chid)
 		   type, et ? et->name : "", code, ec ? ec->name : "",
 		   chid, mthd, data);
 
-	if (chid == 0) {
-		switch (mthd) {
-		case 0x0080:
-			nv50_disp_mthd_chan(disp, NV_DBG_ERROR, chid - 0,
-					    impl->mthd.core);
-			break;
-		default:
-			break;
-		}
-	} else
-	if (chid <= 2) {
-		switch (mthd) {
-		case 0x0080:
-			nv50_disp_mthd_chan(disp, NV_DBG_ERROR, chid - 1,
-					    impl->mthd.base);
-			break;
-		default:
-			break;
-		}
-	} else
-	if (chid <= 4) {
+	if (chid < ARRAY_SIZE(disp->chan)) {
 		switch (mthd) {
 		case 0x0080:
-			nv50_disp_mthd_chan(disp, NV_DBG_ERROR, chid - 3,
-					    impl->mthd.ovly);
+			nv50_disp_chan_mthd(disp->chan[chid], NV_DBG_ERROR);
 			break;
 		default:
 			break;
@@ -673,7 +610,6 @@ nv50_disp_intr_supervisor(struct work_struct *work)
 {
 	struct nv50_disp *disp =
 		container_of(work, struct nv50_disp, supervisor);
-	struct nv50_disp_impl *impl = (void *)nv_object(disp)->oclass;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 super = nvkm_rd32(device, 0x610030);
@@ -682,7 +618,7 @@ nv50_disp_intr_supervisor(struct work_struct *work)
 	nvkm_debug(subdev, "supervisor %08x %08x\n", disp->super, super);
 
 	if (disp->super & 0x00000010) {
-		nv50_disp_mthd_chan(disp, NV_DBG_DEBUG, 0, impl->mthd.core);
+		nv50_disp_chan_mthd(disp->chan[0], NV_DBG_DEBUG);
 		for (head = 0; head < disp->head.nr; head++) {
 			if (!(super & (0x00000020 << head)))
 				continue;
@@ -756,6 +692,11 @@ nv50_disp_intr(struct nvkm_subdev *subdev)
 	}
 }
 
+static const struct nvkm_disp_func
+nv50_disp = {
+	.root = &nv50_disp_root_oclass,
+};
+
 static int
 nv50_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	       struct nvkm_oclass *oclass, void *data, u32 size,
@@ -770,15 +711,14 @@ nv50_disp_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
+	disp->base.func = &nv50_disp;
+
 	ret = nvkm_event_init(&nv50_disp_chan_uevent, 1, 9, &disp->uevent);
 	if (ret)
 		return ret;
 
-	nv_engine(disp)->sclass = nv50_disp_root_oclass;
-	nv_engine(disp)->cclass = &nv50_disp_cclass;
 	nv_subdev(disp)->intr = nv50_disp_intr;
 	INIT_WORK(&disp->supervisor, nv50_disp_intr_supervisor);
-	disp->sclass = nv50_disp_sclass;
 	disp->head.nr = 2;
 	disp->dac.nr = 3;
 	disp->sor.nr = 2;
@@ -805,9 +745,5 @@ nv50_disp_oclass = &(struct nv50_disp_impl) {
 	.base.outp.external.tmds = nv50_pior_output_new,
 	.base.outp.external.dp = nv50_pior_dp_new,
 	.base.vblank = &nv50_disp_vblank_func,
-	.mthd.core = &nv50_disp_core_mthd_chan,
-	.mthd.base = &nv50_disp_base_mthd_chan,
-	.mthd.ovly = &nv50_disp_ovly_mthd_chan,
-	.mthd.prev = 0x000004,
 	.head.scanoutpos = nv50_disp_root_scanoutpos,
 }.base.base;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.h
index e42e66e..13766b2 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.h
@@ -1,5 +1,6 @@
 #ifndef __NV50_DISP_H__
 #define __NV50_DISP_H__
+#define nv50_disp(p) container_of((p), struct nv50_disp, base)
 #include "priv.h"
 struct nvkm_output;
 struct nvkm_output_dp;
@@ -11,7 +12,6 @@ struct nvkm_output_dp;
 
 struct nv50_disp {
 	struct nvkm_disp base;
-	struct nvkm_oclass *sclass;
 
 	struct work_struct supervisor;
 	u32 super;
@@ -39,23 +39,18 @@ struct nv50_disp {
 		int (*power)(NV50_DISP_MTHD_V1);
 		u8 type[3];
 	} pior;
+
+	struct nv50_disp_chan *chan[17];
 };
 
 struct nv50_disp_impl {
 	struct nvkm_disp_impl base;
 	struct {
-		const struct nv50_disp_mthd_chan *core;
-		const struct nv50_disp_mthd_chan *base;
-		const struct nv50_disp_mthd_chan *ovly;
-		int prev;
-	} mthd;
-	struct {
 		int (*scanoutpos)(NV50_DISP_MTHD_V0);
 	} head;
 };
 
 int nv50_disp_root_scanoutpos(NV50_DISP_MTHD_V0);
-int nv50_disp_root_mthd(struct nvkm_object *, u32, void *, u32);
 
 int gf119_disp_root_scanoutpos(NV50_DISP_MTHD_V0);
 
@@ -73,59 +68,11 @@ int gk104_hdmi_ctrl(NV50_DISP_MTHD_V1);
 int nv50_sor_power(NV50_DISP_MTHD_V1);
 int nv50_pior_power(NV50_DISP_MTHD_V1);
 
-extern struct nv50_disp_chan_impl nv50_disp_core_ofuncs;
-int nv50_disp_core_ctor(struct nvkm_object *, struct nvkm_object *,
-			struct nvkm_oclass *, void *, u32,
-			struct nvkm_object **);
-extern struct nv50_disp_chan_impl nv50_disp_base_ofuncs;
-int nv50_disp_base_ctor(struct nvkm_object *, struct nvkm_object *,
-			struct nvkm_oclass *, void *, u32,
-			struct nvkm_object **);
-extern struct nv50_disp_chan_impl nv50_disp_ovly_ofuncs;
-int nv50_disp_ovly_ctor(struct nvkm_object *, struct nvkm_object *,
-			struct nvkm_oclass *, void *, u32,
-			struct nvkm_object **);
-extern struct nv50_disp_chan_impl nv50_disp_oimm_ofuncs;
-int nv50_disp_oimm_ctor(struct nvkm_object *, struct nvkm_object *,
-			struct nvkm_oclass *, void *, u32,
-			struct nvkm_object **);
-extern struct nv50_disp_chan_impl nv50_disp_curs_ofuncs;
-int nv50_disp_curs_ctor(struct nvkm_object *, struct nvkm_object *,
-			struct nvkm_oclass *, void *, u32,
-			struct nvkm_object **);
-extern struct nvkm_ofuncs nv50_disp_root_ofuncs;
-int  nv50_disp_root_ctor(struct nvkm_object *, struct nvkm_object *,
-			 struct nvkm_oclass *, void *, u32,
-			 struct nvkm_object **);
-void nv50_disp_root_dtor(struct nvkm_object *);
-extern struct nvkm_oclass nv50_disp_cclass;
 void nv50_disp_intr_supervisor(struct work_struct *);
 void nv50_disp_intr(struct nvkm_subdev *);
 extern const struct nvkm_event_func nv50_disp_vblank_func;
 
-extern struct nv50_disp_chan_impl gf119_disp_core_ofuncs;
-extern struct nv50_disp_chan_impl gf119_disp_base_ofuncs;
-extern struct nv50_disp_chan_impl gf119_disp_ovly_ofuncs;
-extern struct nv50_disp_chan_impl gf119_disp_oimm_ofuncs;
-extern struct nv50_disp_chan_impl gf119_disp_curs_ofuncs;
-extern struct nvkm_ofuncs gf119_disp_root_ofuncs;
-extern struct nvkm_oclass gf119_disp_cclass;
 void gf119_disp_intr_supervisor(struct work_struct *);
 void gf119_disp_intr(struct nvkm_subdev *);
 extern const struct nvkm_event_func gf119_disp_vblank_func;
-
-extern struct nvkm_output_dp_impl nv50_pior_dp_impl;
-extern struct nvkm_oclass *nv50_disp_outp_sclass[];
-
-extern struct nvkm_output_dp_impl g94_sor_dp_impl;
-u32 g94_sor_dp_lane_map(struct nvkm_device *, u8 lane);
-int g94_sor_dp_lnk_pwr(struct nvkm_output_dp *, int);
-extern struct nvkm_oclass *g94_disp_outp_sclass[];
-
-extern struct nvkm_output_dp_impl gf119_sor_dp_impl;
-int gf119_sor_dp_lnk_ctl(struct nvkm_output_dp *, int, int, bool);
-extern struct nvkm_oclass *gf119_disp_outp_sclass[];
-
-void gm204_sor_magic(struct nvkm_output *outp);
-extern struct nvkm_output_dp_impl gm204_sor_dp_impl;
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmg84.c
new file mode 100644
index 0000000..54a4ae8
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmg84.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "channv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+g84_disp_oimm_oclass = {
+	.base.oclass = G82_DISP_OVERLAY,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_oimm_new,
+	.func = &nv50_disp_pioc_func,
+	.chid = 5,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgf119.c
index fa52805..c658db5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgf119.c
@@ -22,16 +22,16 @@
  * Authors: Ben Skeggs
  */
 #include "channv50.h"
+#include "rootnv50.h"
 
-struct nv50_disp_chan_impl
-gf119_disp_oimm_ofuncs = {
-	.base.ctor = nv50_disp_oimm_ctor,
-	.base.dtor = nv50_disp_pioc_dtor,
-	.base.init = gf119_disp_pioc_init,
-	.base.fini = gf119_disp_pioc_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+gf119_disp_oimm_oclass = {
+	.base.oclass = GF110_DISP_OVERLAY,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_oimm_new,
+	.func = &gf119_disp_pioc_func,
 	.chid = 9,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgk104.c
new file mode 100644
index 0000000..b1fde8c
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgk104.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "channv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+gk104_disp_oimm_oclass = {
+	.base.oclass = GK104_DISP_OVERLAY,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_oimm_new,
+	.func = &gf119_disp_pioc_func,
+	.chid = 9,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgt215.c
new file mode 100644
index 0000000..f4e7eb3
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmgt215.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "channv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_pioc_oclass
+gt215_disp_oimm_oclass = {
+	.base.oclass = GT214_DISP_OVERLAY,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_oimm_new,
+	.func = &nv50_disp_pioc_func,
+	.chid = 5,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmnv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmnv50.c
index 2128b01..6f31c81 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmnv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/oimmnv50.c
@@ -22,6 +22,7 @@
  * Authors: Ben Skeggs
  */
 #include "channv50.h"
+#include "rootnv50.h"
 
 #include <core/client.h>
 
@@ -29,17 +30,18 @@
 #include <nvif/unpack.h>
 
 int
-nv50_disp_oimm_ctor(struct nvkm_object *parent,
-		    struct nvkm_object *engine,
-		    struct nvkm_oclass *oclass, void *data, u32 size,
-		    struct nvkm_object **pobject)
+nv50_disp_oimm_new(const struct nv50_disp_chan_func *func,
+		   const struct nv50_disp_chan_mthd *mthd,
+		   struct nv50_disp_root *root, int chid,
+		   const struct nvkm_oclass *oclass, void *data, u32 size,
+		   struct nvkm_object **pobject)
 {
 	union {
 		struct nv50_disp_overlay_v0 v0;
 	} *args = data;
-	struct nv50_disp *disp = (void *)engine;
-	struct nv50_disp_pioc *pioc;
-	int ret;
+	struct nvkm_object *parent = oclass->parent;
+	struct nv50_disp *disp = root->disp;
+	int head, ret;
 
 	nvif_ioctl(parent, "create disp overlay size %d\n", size);
 	if (nvif_unpack(args->v0, 0, 0, false)) {
@@ -47,27 +49,20 @@ nv50_disp_oimm_ctor(struct nvkm_object *parent,
 			   args->v0.version, args->v0.head);
 		if (args->v0.head > disp->head.nr)
 			return -EINVAL;
+		head = args->v0.head;
 	} else
 		return ret;
 
-	ret = nv50_disp_pioc_create_(parent, engine, oclass, args->v0.head,
-				     sizeof(*pioc), (void **)&pioc);
-	*pobject = nv_object(pioc);
-	if (ret)
-		return ret;
-
-	return 0;
+	return nv50_disp_chan_new_(func, mthd, root, chid + head,
+				   head, oclass, pobject);
 }
 
-struct nv50_disp_chan_impl
-nv50_disp_oimm_ofuncs = {
-	.base.ctor = nv50_disp_oimm_ctor,
-	.base.dtor = nv50_disp_pioc_dtor,
-	.base.init = nv50_disp_pioc_init,
-	.base.fini = nv50_disp_pioc_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_pioc_oclass
+nv50_disp_oimm_oclass = {
+	.base.oclass = NV50_DISP_OVERLAY,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_oimm_new,
+	.func = &nv50_disp_pioc_func,
 	.chid = 5,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
index 83d9d3f..2590fec 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
@@ -27,18 +27,22 @@ struct nvkm_output_func {
 
 void nvkm_output_ctor(const struct nvkm_output_func *, struct nvkm_disp *,
 		      int index, struct dcb_output *, struct nvkm_output *);
-int  nvkm_output_new_(const struct nvkm_output_func *, struct nvkm_disp *,
-		      int index, struct dcb_output *, struct nvkm_output **);
+int nvkm_output_new_(const struct nvkm_output_func *, struct nvkm_disp *,
+		     int index, struct dcb_output *, struct nvkm_output **);
 void nvkm_output_del(struct nvkm_output **);
 void nvkm_output_init(struct nvkm_output *);
 void nvkm_output_fini(struct nvkm_output *);
 
-int  nv50_dac_output_new(struct nvkm_disp *, int, struct dcb_output *,
+int nv50_dac_output_new(struct nvkm_disp *, int, struct dcb_output *,
+			struct nvkm_output **);
+int nv50_sor_output_new(struct nvkm_disp *, int, struct dcb_output *,
+			struct nvkm_output **);
+int nv50_pior_output_new(struct nvkm_disp *, int, struct dcb_output *,
 			 struct nvkm_output **);
-int  nv50_sor_output_new(struct nvkm_disp *, int, struct dcb_output *,
-			 struct nvkm_output **);
-int  nv50_pior_output_new(struct nvkm_disp *, int, struct dcb_output *,
-			  struct nvkm_output **);
+
+u32 g94_sor_dp_lane_map(struct nvkm_device *, u8 lane);
+
+void gm204_sor_magic(struct nvkm_output *outp);
 
 #define OUTP_MSG(o,l,f,a...) do {                                              \
 	struct nvkm_output *_outp = (o);                                       \
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h
index 18ddf48..731136d 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h
@@ -52,14 +52,16 @@ int nvkm_output_dp_new_(const struct nvkm_output_dp_func *, struct nvkm_disp *,
 			int index, struct dcb_output *,
 			struct nvkm_output **);
 
-int  nv50_pior_dp_new(struct nvkm_disp *, int, struct dcb_output *,
-		      struct nvkm_output **);
+int nv50_pior_dp_new(struct nvkm_disp *, int, struct dcb_output *,
+		     struct nvkm_output **);
 
-int  g94_sor_dp_new(struct nvkm_disp *, int, struct dcb_output *,
-		    struct nvkm_output **);
+int g94_sor_dp_new(struct nvkm_disp *, int, struct dcb_output *,
+		   struct nvkm_output **);
+int g94_sor_dp_lnk_pwr(struct nvkm_output_dp *, int);
 
-int  gf119_sor_dp_new(struct nvkm_disp *, int, struct dcb_output *,
-		      struct nvkm_output **);
+int gf119_sor_dp_new(struct nvkm_disp *, int, struct dcb_output *,
+		     struct nvkm_output **);
+int gf119_sor_dp_lnk_ctl(struct nvkm_output_dp *, int, int, bool);
 
 int  gm204_sor_dp_new(struct nvkm_disp *, int, struct dcb_output *,
 		      struct nvkm_output **);
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlyg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlyg84.c
index 149e7c4..db6234e 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlyg84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlyg84.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 g84_disp_ovly_mthd_base = {
@@ -51,12 +54,24 @@ g84_disp_ovly_mthd_base = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-g84_disp_ovly_mthd_chan = {
+const struct nv50_disp_chan_mthd
+g84_disp_ovly_chan_mthd = {
 	.name = "Overlay",
 	.addr = 0x000540,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &g84_disp_ovly_mthd_base },
 		{}
 	}
 };
+
+const struct nv50_disp_dmac_oclass
+g84_disp_ovly_oclass = {
+	.base.oclass = G82_DISP_OVERLAY_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_ovly_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &g84_disp_ovly_chan_mthd,
+	.chid = 3,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygf119.c
index c44c927..5985879 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygf119.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 gf119_disp_ovly_mthd_base = {
@@ -75,27 +78,24 @@ gf119_disp_ovly_mthd_base = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-gf119_disp_ovly_mthd_chan = {
+static const struct nv50_disp_chan_mthd
+gf119_disp_ovly_chan_mthd = {
 	.name = "Overlay",
 	.addr = 0x001000,
+	.prev = -0x020000,
 	.data = {
 		{ "Global", 1, &gf119_disp_ovly_mthd_base },
 		{}
 	}
 };
 
-struct nv50_disp_chan_impl
-gf119_disp_ovly_ofuncs = {
-	.base.ctor = nv50_disp_ovly_ctor,
-	.base.dtor = nv50_disp_dmac_dtor,
-	.base.init = gf119_disp_dmac_init,
-	.base.fini = gf119_disp_dmac_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_dmac_oclass
+gf119_disp_ovly_oclass = {
+	.base.oclass = GF110_DISP_OVERLAY_CONTROL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_ovly_new,
+	.func = &gf119_disp_dmac_func,
+	.mthd = &gf119_disp_ovly_chan_mthd,
 	.chid = 5,
-	.attach = gf119_disp_dmac_object_attach,
-	.detach = gf119_disp_dmac_object_detach,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygk104.c
index 7b83d70..2e2dc06 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygk104.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 gk104_disp_ovly_mthd_base = {
@@ -77,12 +80,24 @@ gk104_disp_ovly_mthd_base = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-gk104_disp_ovly_mthd_chan = {
+static const struct nv50_disp_chan_mthd
+gk104_disp_ovly_chan_mthd = {
 	.name = "Overlay",
 	.addr = 0x001000,
+	.prev = -0x020000,
 	.data = {
 		{ "Global", 1, &gk104_disp_ovly_mthd_base },
 		{}
 	}
 };
+
+const struct nv50_disp_dmac_oclass
+gk104_disp_ovly_oclass = {
+	.base.oclass = GK104_DISP_OVERLAY_CONTROL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_ovly_new,
+	.func = &gf119_disp_dmac_func,
+	.mthd = &gk104_disp_ovly_chan_mthd,
+	.chid = 5,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygt200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygt200.c
index 8299b5e..f858053 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygt200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygt200.c
@@ -22,6 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 gt200_disp_ovly_mthd_base = {
@@ -54,12 +57,24 @@ gt200_disp_ovly_mthd_base = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-gt200_disp_ovly_mthd_chan = {
+static const struct nv50_disp_chan_mthd
+gt200_disp_ovly_chan_mthd = {
 	.name = "Overlay",
 	.addr = 0x000540,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &gt200_disp_ovly_mthd_base },
 		{}
 	}
 };
+
+const struct nv50_disp_dmac_oclass
+gt200_disp_ovly_oclass = {
+	.base.oclass = GT200_DISP_OVERLAY_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_ovly_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &gt200_disp_ovly_chan_mthd,
+	.chid = 3,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygt215.c
new file mode 100644
index 0000000..c947e1e
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlygt215.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "dmacnv50.h"
+#include "rootnv50.h"
+
+#include <nvif/class.h>
+
+const struct nv50_disp_dmac_oclass
+gt215_disp_ovly_oclass = {
+	.base.oclass = GT214_DISP_OVERLAY_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_ovly_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &g84_disp_ovly_chan_mthd,
+	.chid = 3,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlynv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlynv50.c
index 840e2b0..110662c 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlynv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/ovlynv50.c
@@ -22,13 +22,45 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
+#include "rootnv50.h"
 
 #include <core/client.h>
 
 #include <nvif/class.h>
 #include <nvif/unpack.h>
 
-const struct nv50_disp_mthd_list
+int
+nv50_disp_ovly_new(const struct nv50_disp_dmac_func *func,
+		   const struct nv50_disp_chan_mthd *mthd,
+		   struct nv50_disp_root *root, int chid,
+		   const struct nvkm_oclass *oclass, void *data, u32 size,
+		   struct nvkm_object **pobject)
+{
+	union {
+		struct nv50_disp_overlay_channel_dma_v0 v0;
+	} *args = data;
+	struct nvkm_object *parent = oclass->parent;
+	struct nv50_disp *disp = root->disp;
+	int head, ret;
+	u64 push;
+
+	nvif_ioctl(parent, "create disp overlay channel dma size %d\n", size);
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		nvif_ioctl(parent, "create disp overlay channel dma vers %d "
+				   "pushbuf %016llx head %d\n",
+			   args->v0.version, args->v0.pushbuf, args->v0.head);
+		if (args->v0.head > disp->head.nr)
+			return -EINVAL;
+		push = args->v0.pushbuf;
+		head = args->v0.head;
+	} else
+		return ret;
+
+	return nv50_disp_dmac_new_(func, mthd, root, chid + head,
+				   head, push, oclass, pobject);
+}
+
+static const struct nv50_disp_mthd_list
 nv50_disp_ovly_mthd_base = {
 	.mthd = 0x0000,
 	.addr = 0x000000,
@@ -56,60 +88,24 @@ nv50_disp_ovly_mthd_base = {
 	}
 };
 
-const struct nv50_disp_mthd_chan
-nv50_disp_ovly_mthd_chan = {
+static const struct nv50_disp_chan_mthd
+nv50_disp_ovly_chan_mthd = {
 	.name = "Overlay",
 	.addr = 0x000540,
+	.prev = 0x000004,
 	.data = {
 		{ "Global", 1, &nv50_disp_ovly_mthd_base },
 		{}
 	}
 };
 
-int
-nv50_disp_ovly_ctor(struct nvkm_object *parent,
-		    struct nvkm_object *engine,
-		    struct nvkm_oclass *oclass, void *data, u32 size,
-		    struct nvkm_object **pobject)
-{
-	union {
-		struct nv50_disp_overlay_channel_dma_v0 v0;
-	} *args = data;
-	struct nv50_disp *disp = (void *)engine;
-	struct nv50_disp_dmac *dmac;
-	int ret;
-
-	nvif_ioctl(parent, "create disp overlay channel dma size %d\n", size);
-	if (nvif_unpack(args->v0, 0, 0, false)) {
-		nvif_ioctl(parent, "create disp overlay channel dma vers %d "
-				   "pushbuf %016llx head %d\n",
-			   args->v0.version, args->v0.pushbuf, args->v0.head);
-		if (args->v0.head > disp->head.nr)
-			return -EINVAL;
-	} else
-		return ret;
-
-	ret = nv50_disp_dmac_create_(parent, engine, oclass, args->v0.pushbuf,
-				     args->v0.head, sizeof(*dmac),
-				     (void **)&dmac);
-	*pobject = nv_object(dmac);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-struct nv50_disp_chan_impl
-nv50_disp_ovly_ofuncs = {
-	.base.ctor = nv50_disp_ovly_ctor,
-	.base.dtor = nv50_disp_dmac_dtor,
-	.base.init = nv50_disp_dmac_init,
-	.base.fini = nv50_disp_dmac_fini,
-	.base.ntfy = nv50_disp_chan_ntfy,
-	.base.map  = nv50_disp_chan_map,
-	.base.rd32 = nv50_disp_chan_rd32,
-	.base.wr32 = nv50_disp_chan_wr32,
+const struct nv50_disp_dmac_oclass
+nv50_disp_ovly_oclass = {
+	.base.oclass = NV50_DISP_OVERLAY_CHANNEL_DMA,
+	.base.minver = 0,
+	.base.maxver = 0,
+	.ctor = nv50_disp_ovly_new,
+	.func = &nv50_disp_dmac_func,
+	.mthd = &nv50_disp_ovly_chan_mthd,
 	.chid = 3,
-	.attach = nv50_disp_dmac_object_attach,
-	.detach = nv50_disp_dmac_object_detach,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocgf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocgf119.c
index 08aeb8e..a625a98 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocgf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocgf119.c
@@ -22,17 +22,17 @@
  * Authors: Ben Skeggs
  */
 #include "channv50.h"
+#include "rootnv50.h"
 
 #include <subdev/timer.h>
 
-int
-gf119_disp_pioc_fini(struct nvkm_object *object, bool suspend)
+static void
+gf119_disp_pioc_fini(struct nv50_disp_chan *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_pioc *pioc = (void *)object;
+	struct nv50_disp *disp = chan->root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = pioc->base.chid;
+	int chid = chan->chid;
 
 	nvkm_mask(device, 0x610490 + (chid * 0x10), 0x00000001, 0x00000000);
 	if (nvkm_msec(device, 2000,
@@ -41,30 +41,20 @@ gf119_disp_pioc_fini(struct nvkm_object *object, bool suspend)
 	) < 0) {
 		nvkm_error(subdev, "ch %d fini: %08x\n", chid,
 			   nvkm_rd32(device, 0x610490 + (chid * 0x10)));
-		if (suspend)
-			return -EBUSY;
 	}
 
 	/* disable error reporting and completion notification */
 	nvkm_mask(device, 0x610090, 0x00000001 << chid, 0x00000000);
 	nvkm_mask(device, 0x6100a0, 0x00000001 << chid, 0x00000000);
-
-	return nv50_disp_chan_fini(&pioc->base, suspend);
 }
 
-int
-gf119_disp_pioc_init(struct nvkm_object *object)
+static int
+gf119_disp_pioc_init(struct nv50_disp_chan *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_pioc *pioc = (void *)object;
+	struct nv50_disp *disp = chan->root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = pioc->base.chid;
-	int ret;
-
-	ret = nv50_disp_chan_init(&pioc->base);
-	if (ret)
-		return ret;
+	int chid = chan->chid;
 
 	/* enable error reporting */
 	nvkm_mask(device, 0x6100a0, 0x00000001 << chid, 0x00000001 << chid);
@@ -83,3 +73,9 @@ gf119_disp_pioc_init(struct nvkm_object *object)
 
 	return 0;
 }
+
+const struct nv50_disp_chan_func
+gf119_disp_pioc_func = {
+	.init = gf119_disp_pioc_init,
+	.fini = gf119_disp_pioc_fini,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocnv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocnv50.c
index 13e4711..9d2618d 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocnv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/piocnv50.c
@@ -22,17 +22,17 @@
  * Authors: Ben Skeggs
  */
 #include "channv50.h"
+#include "rootnv50.h"
 
 #include <subdev/timer.h>
 
-int
-nv50_disp_pioc_fini(struct nvkm_object *object, bool suspend)
+static void
+nv50_disp_pioc_fini(struct nv50_disp_chan *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_pioc *pioc = (void *)object;
+	struct nv50_disp *disp = chan->root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = pioc->base.chid;
+	int chid = chan->chid;
 
 	nvkm_mask(device, 0x610200 + (chid * 0x10), 0x00000001, 0x00000000);
 	if (nvkm_msec(device, 2000,
@@ -41,26 +41,16 @@ nv50_disp_pioc_fini(struct nvkm_object *object, bool suspend)
 	) < 0) {
 		nvkm_error(subdev, "ch %d timeout: %08x\n", chid,
 			   nvkm_rd32(device, 0x610200 + (chid * 0x10)));
-		if (suspend)
-			return -EBUSY;
 	}
-
-	return nv50_disp_chan_fini(&pioc->base, suspend);
 }
 
-int
-nv50_disp_pioc_init(struct nvkm_object *object)
+static int
+nv50_disp_pioc_init(struct nv50_disp_chan *chan)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_pioc *pioc = (void *)object;
+	struct nv50_disp *disp = chan->root->disp;
 	struct nvkm_subdev *subdev = &disp->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	int chid = pioc->base.chid;
-	int ret;
-
-	ret = nv50_disp_chan_init(&pioc->base);
-	if (ret)
-		return ret;
+	int chid = chan->chid;
 
 	nvkm_wr32(device, 0x610200 + (chid * 0x10), 0x00002000);
 	if (nvkm_msec(device, 2000,
@@ -86,19 +76,8 @@ nv50_disp_pioc_init(struct nvkm_object *object)
 	return 0;
 }
 
-void
-nv50_disp_pioc_dtor(struct nvkm_object *object)
-{
-	struct nv50_disp_pioc *pioc = (void *)object;
-	nv50_disp_chan_destroy(&pioc->base);
-}
-
-int
-nv50_disp_pioc_create_(struct nvkm_object *parent,
-		       struct nvkm_object *engine,
-		       struct nvkm_oclass *oclass, int head,
-		       int length, void **pobject)
-{
-	return nv50_disp_chan_create_(parent, engine, oclass, head,
-				      length, pobject);
-}
+const struct nv50_disp_chan_func
+nv50_disp_pioc_func = {
+	.init = nv50_disp_pioc_init,
+	.fini = nv50_disp_pioc_fini,
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h
index 603526c..6cd6086 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h
@@ -57,5 +57,11 @@ int  nvkm_disp_vblank_ctor(struct nvkm_object *, void *data, u32 size,
 void nvkm_disp_vblank(struct nvkm_disp *, int head);
 int  nvkm_disp_ntfy(struct nvkm_object *, u32, struct nvkm_event **);
 
-extern struct nvkm_oclass nv04_disp_sclass[];
+extern const struct nvkm_disp_oclass nv04_disp_root_oclass;
+
+struct nvkm_disp_oclass {
+	int (*ctor)(struct nvkm_disp *, const struct nvkm_oclass *,
+		    void *data, u32 size, struct nvkm_object **);
+	struct nvkm_sclass base;
+};
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c
index 128b2d7..721e4f7 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-g84_disp_sclass[] = {
-	{ G82_DISP_CORE_CHANNEL_DMA, &nv50_disp_core_ofuncs.base },
-	{ G82_DISP_BASE_CHANNEL_DMA, &nv50_disp_base_ofuncs.base },
-	{ G82_DISP_OVERLAY_CHANNEL_DMA, &nv50_disp_ovly_ofuncs.base },
-	{ G82_DISP_OVERLAY, &nv50_disp_oimm_ofuncs.base },
-	{ G82_DISP_CURSOR, &nv50_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+g84_disp_root = {
+	.init = nv50_disp_root_init,
+	.fini = nv50_disp_root_fini,
+	.dmac = {
+		&g84_disp_core_oclass,
+		&g84_disp_base_oclass,
+		&g84_disp_ovly_oclass,
+	},
+	.pioc = {
+		&g84_disp_oimm_oclass,
+		&g84_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-g84_disp_root_oclass[] = {
-	{ G82_DISP, &nv50_disp_root_ofuncs },
-	{}
+static int
+g84_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		  void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&g84_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+g84_disp_root_oclass = {
+	.base.oclass = G82_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = g84_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c
index 9b1ef88..9493f6e 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-g94_disp_sclass[] = {
-	{ GT206_DISP_CORE_CHANNEL_DMA, &nv50_disp_core_ofuncs.base },
-	{ GT200_DISP_BASE_CHANNEL_DMA, &nv50_disp_base_ofuncs.base },
-	{ GT200_DISP_OVERLAY_CHANNEL_DMA, &nv50_disp_ovly_ofuncs.base },
-	{ G82_DISP_OVERLAY, &nv50_disp_oimm_ofuncs.base },
-	{ G82_DISP_CURSOR, &nv50_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+g94_disp_root = {
+	.init = nv50_disp_root_init,
+	.fini = nv50_disp_root_fini,
+	.dmac = {
+		&g94_disp_core_oclass,
+		&gt200_disp_base_oclass,
+		&gt200_disp_ovly_oclass,
+	},
+	.pioc = {
+		&g84_disp_oimm_oclass,
+		&g84_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-g94_disp_root_oclass[] = {
-	{ GT206_DISP, &nv50_disp_root_ofuncs },
-	{}
+static int
+g94_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		  void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&g94_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+g94_disp_root_oclass = {
+	.base.oclass = GT206_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = g94_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c
index ae55cb2..5868c44 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c
@@ -65,18 +65,21 @@ gf119_disp_root_scanoutpos(NV50_DISP_MTHD_V0)
 	return 0;
 }
 
-static int
-gf119_disp_root_init(struct nvkm_object *object)
+void
+gf119_disp_root_fini(struct nv50_disp_root *root)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_root *root = (void *)object;
+	struct nvkm_device *device = root->disp->base.engine.subdev.device;
+	/* disable all interrupts */
+	nvkm_wr32(device, 0x6100b0, 0x00000000);
+}
+
+int
+gf119_disp_root_init(struct nv50_disp_root *root)
+{
+	struct nv50_disp *disp = root->disp;
 	struct nvkm_device *device = disp->base.engine.subdev.device;
-	int ret, i;
 	u32 tmp;
-
-	ret = nvkm_parent_init(&root->base);
-	if (ret)
-		return ret;
+	int i;
 
 	/* The below segments of code copying values from one register to
 	 * another appear to inform EVO of the display capabilities or
@@ -117,7 +120,7 @@ gf119_disp_root_init(struct nvkm_object *object)
 	}
 
 	/* point at display engine memory area (hash table, objects) */
-	nvkm_wr32(device, 0x610010, (nv_gpuobj(object->parent)->addr >> 8) | 9);
+	nvkm_wr32(device, 0x610010, (root->instmem->addr >> 8) | 9);
 
 	/* enable supervisor interrupts, disable everything else */
 	nvkm_wr32(device, 0x610090, 0x00000000);
@@ -136,41 +139,33 @@ gf119_disp_root_init(struct nvkm_object *object)
 	return 0;
 }
 
-static int
-gf119_disp_root_fini(struct nvkm_object *object, bool suspend)
-{
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_root *root = (void *)object;
-	struct nvkm_device *device = disp->base.engine.subdev.device;
-
-	/* disable all interrupts */
-	nvkm_wr32(device, 0x6100b0, 0x00000000);
-
-	return nvkm_parent_fini(&root->base, suspend);
-}
-
-struct nvkm_ofuncs
-gf119_disp_root_ofuncs = {
-	.ctor = nv50_disp_root_ctor,
-	.dtor = nv50_disp_root_dtor,
+static const struct nv50_disp_root_func
+gf119_disp_root = {
 	.init = gf119_disp_root_init,
 	.fini = gf119_disp_root_fini,
-	.mthd = nv50_disp_root_mthd,
-	.ntfy = nvkm_disp_ntfy,
+	.dmac = {
+		&gf119_disp_core_oclass,
+		&gf119_disp_base_oclass,
+		&gf119_disp_ovly_oclass,
+	},
+	.pioc = {
+		&gf119_disp_oimm_oclass,
+		&gf119_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-gf119_disp_root_oclass[] = {
-	{ GF110_DISP, &gf119_disp_root_ofuncs },
-	{}
-};
+static int
+gf119_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&gf119_disp_root, disp, oclass,
+				   data, size, pobject);
+}
 
-struct nvkm_oclass
-gf119_disp_sclass[] = {
-	{ GF110_DISP_CORE_CHANNEL_DMA, &gf119_disp_core_ofuncs.base },
-	{ GF110_DISP_BASE_CHANNEL_DMA, &gf119_disp_base_ofuncs.base },
-	{ GF110_DISP_OVERLAY_CONTROL_DMA, &gf119_disp_ovly_ofuncs.base },
-	{ GF110_DISP_OVERLAY, &gf119_disp_oimm_ofuncs.base },
-	{ GF110_DISP_CURSOR, &gf119_disp_curs_ofuncs.base },
-	{}
+const struct nvkm_disp_oclass
+gf119_disp_root_oclass = {
+	.base.oclass = GF110_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = gf119_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c
index f89b334..0bfdb1d 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-gk104_disp_sclass[] = {
-	{ GK104_DISP_CORE_CHANNEL_DMA, &gf119_disp_core_ofuncs.base },
-	{ GK104_DISP_BASE_CHANNEL_DMA, &gf119_disp_base_ofuncs.base },
-	{ GK104_DISP_OVERLAY_CONTROL_DMA, &gf119_disp_ovly_ofuncs.base },
-	{ GK104_DISP_OVERLAY, &gf119_disp_oimm_ofuncs.base },
-	{ GK104_DISP_CURSOR, &gf119_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+gk104_disp_root = {
+	.init = gf119_disp_root_init,
+	.fini = gf119_disp_root_fini,
+	.dmac = {
+		&gk104_disp_core_oclass,
+		&gk104_disp_base_oclass,
+		&gk104_disp_ovly_oclass,
+	},
+	.pioc = {
+		&gk104_disp_oimm_oclass,
+		&gk104_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-gk104_disp_root_oclass[] = {
-	{ GK104_DISP, &gf119_disp_root_ofuncs },
-	{}
+static int
+gk104_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&gk104_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+gk104_disp_root_oclass = {
+	.base.oclass = GK104_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = gk104_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c
index ef2f73a..1e8dbed 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-gk110_disp_sclass[] = {
-	{ GK110_DISP_CORE_CHANNEL_DMA, &gf119_disp_core_ofuncs.base },
-	{ GK110_DISP_BASE_CHANNEL_DMA, &gf119_disp_base_ofuncs.base },
-	{ GK104_DISP_OVERLAY_CONTROL_DMA, &gf119_disp_ovly_ofuncs.base },
-	{ GK104_DISP_OVERLAY, &gf119_disp_oimm_ofuncs.base },
-	{ GK104_DISP_CURSOR, &gf119_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+gk110_disp_root = {
+	.init = gf119_disp_root_init,
+	.fini = gf119_disp_root_fini,
+	.dmac = {
+		&gk110_disp_core_oclass,
+		&gk110_disp_base_oclass,
+		&gk104_disp_ovly_oclass,
+	},
+	.pioc = {
+		&gk104_disp_oimm_oclass,
+		&gk104_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-gk110_disp_root_oclass[] = {
-	{ GK110_DISP, &gf119_disp_root_ofuncs },
-	{}
+static int
+gk110_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&gk110_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+gk110_disp_root_oclass = {
+	.base.oclass = GK110_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = gk110_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c
index ba69ee4..44c55be 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-gm107_disp_sclass[] = {
-	{ GM107_DISP_CORE_CHANNEL_DMA, &gf119_disp_core_ofuncs.base },
-	{ GK110_DISP_BASE_CHANNEL_DMA, &gf119_disp_base_ofuncs.base },
-	{ GK104_DISP_OVERLAY_CONTROL_DMA, &gf119_disp_ovly_ofuncs.base },
-	{ GK104_DISP_OVERLAY, &gf119_disp_oimm_ofuncs.base },
-	{ GK104_DISP_CURSOR, &gf119_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+gm107_disp_root = {
+	.init = gf119_disp_root_init,
+	.fini = gf119_disp_root_fini,
+	.dmac = {
+		&gm107_disp_core_oclass,
+		&gk110_disp_base_oclass,
+		&gk104_disp_ovly_oclass,
+	},
+	.pioc = {
+		&gk104_disp_oimm_oclass,
+		&gk104_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-gm107_disp_root_oclass[] = {
-	{ GM107_DISP, &gf119_disp_root_ofuncs },
-	{}
+static int
+gm107_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&gm107_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+gm107_disp_root_oclass = {
+	.base.oclass = GM107_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = gm107_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm204.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm204.c
index 255308f..168bffe 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm204.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm204.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-gm204_disp_sclass[] = {
-	{ GM204_DISP_CORE_CHANNEL_DMA, &gf119_disp_core_ofuncs.base },
-	{ GK110_DISP_BASE_CHANNEL_DMA, &gf119_disp_base_ofuncs.base },
-	{ GK104_DISP_OVERLAY_CONTROL_DMA, &gf119_disp_ovly_ofuncs.base },
-	{ GK104_DISP_OVERLAY, &gf119_disp_oimm_ofuncs.base },
-	{ GK104_DISP_CURSOR, &gf119_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+gm204_disp_root = {
+	.init = gf119_disp_root_init,
+	.fini = gf119_disp_root_fini,
+	.dmac = {
+		&gm204_disp_core_oclass,
+		&gk110_disp_base_oclass,
+		&gk104_disp_ovly_oclass,
+	},
+	.pioc = {
+		&gk104_disp_oimm_oclass,
+		&gk104_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-gm204_disp_root_oclass[] = {
-	{ GM204_DISP, &gf119_disp_root_ofuncs },
-	{}
+static int
+gm204_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&gm204_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+gm204_disp_root_oclass = {
+	.base.oclass = GM204_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = gm204_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c
index b1963e5..124a0c2 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-gt200_disp_sclass[] = {
-	{ GT200_DISP_CORE_CHANNEL_DMA, &nv50_disp_core_ofuncs.base },
-	{ GT200_DISP_BASE_CHANNEL_DMA, &nv50_disp_base_ofuncs.base },
-	{ GT200_DISP_OVERLAY_CHANNEL_DMA, &nv50_disp_ovly_ofuncs.base },
-	{ G82_DISP_OVERLAY, &nv50_disp_oimm_ofuncs.base },
-	{ G82_DISP_CURSOR, &nv50_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+gt200_disp_root = {
+	.init = nv50_disp_root_init,
+	.fini = nv50_disp_root_fini,
+	.dmac = {
+		&gt200_disp_core_oclass,
+		&gt200_disp_base_oclass,
+		&gt200_disp_ovly_oclass,
+	},
+	.pioc = {
+		&g84_disp_oimm_oclass,
+		&g84_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-gt200_disp_root_oclass[] = {
-	{ GT200_DISP, &nv50_disp_root_ofuncs },
-	{}
+static int
+gt200_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&gt200_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+gt200_disp_root_oclass = {
+	.base.oclass = GT200_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = gt200_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c
index 83b214a..dff52f3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c
@@ -26,18 +26,33 @@
 
 #include <nvif/class.h>
 
-struct nvkm_oclass
-gt215_disp_sclass[] = {
-	{ GT214_DISP_CORE_CHANNEL_DMA, &nv50_disp_core_ofuncs.base },
-	{ GT214_DISP_BASE_CHANNEL_DMA, &nv50_disp_base_ofuncs.base },
-	{ GT214_DISP_OVERLAY_CHANNEL_DMA, &nv50_disp_ovly_ofuncs.base },
-	{ GT214_DISP_OVERLAY, &nv50_disp_oimm_ofuncs.base },
-	{ GT214_DISP_CURSOR, &nv50_disp_curs_ofuncs.base },
-	{}
+static const struct nv50_disp_root_func
+gt215_disp_root = {
+	.init = nv50_disp_root_init,
+	.fini = nv50_disp_root_fini,
+	.dmac = {
+		&gt215_disp_core_oclass,
+		&gt215_disp_base_oclass,
+		&gt215_disp_ovly_oclass,
+	},
+	.pioc = {
+		&gt215_disp_oimm_oclass,
+		&gt215_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-gt215_disp_root_oclass[] = {
-	{ GT214_DISP, &nv50_disp_root_ofuncs },
-	{}
+static int
+gt215_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&gt215_disp_root, disp, oclass,
+				   data, size, pobject);
+}
+
+const struct nvkm_disp_oclass
+gt215_disp_root_oclass = {
+	.base.oclass = GT214_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = gt215_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv04.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv04.c
index 603ebb6..2d9b81f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv04.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv04.c
@@ -21,6 +21,7 @@
  *
  * Authors: Ben Skeggs
  */
+#define nv04_disp_root(p) container_of((p), struct nv04_disp_root, object);
 #include "priv.h"
 
 #include <core/client.h>
@@ -28,11 +29,17 @@
 #include <nvif/class.h>
 #include <nvif/unpack.h>
 
+struct nv04_disp_root {
+	struct nvkm_object object;
+	struct nvkm_disp *disp;
+};
+
 static int
-nv04_disp_scanoutpos(struct nvkm_object *object, struct nvkm_disp *disp,
+nv04_disp_scanoutpos(struct nv04_disp_root *root,
 		     void *data, u32 size, int head)
 {
-	struct nvkm_device *device = disp->engine.subdev.device;
+	struct nvkm_device *device = root->disp->engine.subdev.device;
+	struct nvkm_object *object = &root->object;
 	const u32 hoff = head * 0x2000;
 	union {
 		struct nv04_disp_scanoutpos_v0 v0;
@@ -74,10 +81,10 @@ nv04_disp_scanoutpos(struct nvkm_object *object, struct nvkm_disp *disp,
 static int
 nv04_disp_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 {
+	struct nv04_disp_root *root = nv04_disp_root(object);
 	union {
 		struct nv04_disp_mthd_v0 v0;
 	} *args = data;
-	struct nvkm_disp *disp = (void *)object->engine;
 	int head, ret;
 
 	nvif_ioctl(object, "disp mthd size %d\n", size);
@@ -94,7 +101,7 @@ nv04_disp_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 
 	switch (mthd) {
 	case NV04_DISP_SCANOUTPOS:
-		return nv04_disp_scanoutpos(object, disp, data, size, head);
+		return nv04_disp_scanoutpos(root, data, size, head);
 	default:
 		break;
 	}
@@ -102,18 +109,31 @@ nv04_disp_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 	return -EINVAL;
 }
 
-static struct nvkm_ofuncs
-nv04_disp_ofuncs = {
-	.ctor = _nvkm_object_ctor,
-	.dtor = nvkm_object_destroy,
-	.init = _nvkm_object_init,
-	.fini = _nvkm_object_fini,
+static struct nvkm_object_func
+nv04_disp_root = {
 	.mthd = nv04_disp_mthd,
 	.ntfy = nvkm_disp_ntfy,
 };
 
-struct nvkm_oclass
-nv04_disp_sclass[] = {
-	{ NV04_DISP, &nv04_disp_ofuncs },
-	{},
+static int
+nv04_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		   void *data, u32 size, struct nvkm_object **pobject)
+{
+	struct nv04_disp_root *root;
+
+	if (!(root = kzalloc(sizeof(*root), GFP_KERNEL)))
+		return -ENOMEM;
+	root->disp = disp;
+	*pobject = &root->object;
+
+	nvkm_object_ctor(&nv04_disp_root, oclass, &root->object);
+	return 0;
+}
+
+const struct nvkm_disp_oclass
+nv04_disp_root_oclass = {
+	.base.oclass = NV04_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = nv04_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c
index 8354970..472357f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c
@@ -66,14 +66,15 @@ nv50_disp_root_scanoutpos(NV50_DISP_MTHD_V0)
 }
 
 int
-nv50_disp_root_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
+nv50_disp_root_mthd_(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 {
-	const struct nv50_disp_impl *impl = (void *)nv_oclass(object->engine);
 	union {
 		struct nv50_disp_mthd_v0 v0;
 		struct nv50_disp_mthd_v1 v1;
 	} *args = data;
-	struct nv50_disp *disp = (void *)object->engine;
+	struct nv50_disp_root *root = nv50_disp_root(object);
+	struct nv50_disp *disp = root->disp;
+	const struct nv50_disp_impl *impl = (void *)nv_oclass(object->engine);
 	struct nvkm_output *outp = NULL;
 	struct nvkm_output *temp;
 	u16 type, mask = 0;
@@ -187,48 +188,127 @@ nv50_disp_root_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 	return -EINVAL;
 }
 
+static int
+nv50_disp_root_dmac_new_(const struct nvkm_oclass *oclass,
+			 void *data, u32 size, struct nvkm_object **pobject)
+{
+	const struct nv50_disp_dmac_oclass *sclass = oclass->priv;
+	struct nv50_disp_root *root = nv50_disp_root(oclass->parent);
+	return sclass->ctor(sclass->func, sclass->mthd, root, sclass->chid,
+			    oclass, data, size, pobject);
+}
+
+static int
+nv50_disp_root_pioc_new_(const struct nvkm_oclass *oclass,
+			 void *data, u32 size, struct nvkm_object **pobject)
+{
+	const struct nv50_disp_pioc_oclass *sclass = oclass->priv;
+	struct nv50_disp_root *root = nv50_disp_root(oclass->parent);
+	return sclass->ctor(sclass->func, sclass->mthd, root, sclass->chid,
+			    oclass, data, size, pobject);
+}
+
+static int
+nv50_disp_root_child_get_(struct nvkm_object *object, int index,
+			  struct nvkm_oclass *sclass)
+{
+	struct nv50_disp_root *root = nv50_disp_root(object);
+
+	if (index < ARRAY_SIZE(root->func->dmac)) {
+		sclass->base = root->func->dmac[index]->base;
+		sclass->priv = root->func->dmac[index];
+		sclass->ctor = nv50_disp_root_dmac_new_;
+		return 0;
+	}
+
+	index -= ARRAY_SIZE(root->func->dmac);
+
+	if (index < ARRAY_SIZE(root->func->pioc)) {
+		sclass->base = root->func->pioc[index]->base;
+		sclass->priv = root->func->pioc[index];
+		sclass->ctor = nv50_disp_root_pioc_new_;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static int
+nv50_disp_root_fini_(struct nvkm_object *object, bool suspend)
+{
+	struct nv50_disp_root *root = nv50_disp_root(object);
+	root->func->fini(root);
+	return 0;
+}
+
+static int
+nv50_disp_root_init_(struct nvkm_object *object)
+{
+	struct nv50_disp_root *root = nv50_disp_root(object);
+	return root->func->init(root);
+}
+
+static void *
+nv50_disp_root_dtor_(struct nvkm_object *object)
+{
+	struct nv50_disp_root *root = nv50_disp_root(object);
+	nvkm_ramht_del(&root->ramht);
+	nvkm_gpuobj_del(&root->instmem);
+	return root;
+}
+
+static const struct nvkm_object_func
+nv50_disp_root_ = {
+	.dtor = nv50_disp_root_dtor_,
+	.init = nv50_disp_root_init_,
+	.fini = nv50_disp_root_fini_,
+	.mthd = nv50_disp_root_mthd_,
+	.ntfy = nvkm_disp_ntfy,
+	.sclass = nv50_disp_root_child_get_,
+};
+
 int
-nv50_disp_root_ctor(struct nvkm_object *parent,
-		    struct nvkm_object *engine,
-		    struct nvkm_oclass *oclass, void *data, u32 size,
-		    struct nvkm_object **pobject)
+nv50_disp_root_new_(const struct nv50_disp_root_func *func,
+		    struct nvkm_disp *base, const struct nvkm_oclass *oclass,
+		    void *data, u32 size, struct nvkm_object **pobject)
 {
-	struct nv50_disp *disp = (void *)engine;
+	struct nv50_disp *disp = nv50_disp(base);
 	struct nv50_disp_root *root;
 	struct nvkm_device *device = disp->base.engine.subdev.device;
-	struct nvkm_gpuobj *instmem = (void *)parent;
 	int ret;
 
-	ret = nvkm_parent_create(parent, engine, oclass, 0,
-				 disp->sclass, 0, &root);
-	*pobject = nv_object(root);
+	if (!(root = kzalloc(sizeof(*root), GFP_KERNEL)))
+		return -ENOMEM;
+	*pobject = &root->object;
+
+	nvkm_object_ctor(&nv50_disp_root_, oclass, &root->object);
+	root->func = func;
+	root->disp = disp;
+
+	ret = nvkm_gpuobj_new(disp->base.engine.subdev.device, 0x10000, 0x10000,
+			      false, NULL, &root->instmem);
 	if (ret)
 		return ret;
 
-
-	return nvkm_ramht_new(device, 0x1000, 0, instmem, &root->ramht);
+	return nvkm_ramht_new(device, 0x1000, 0, root->instmem, &root->ramht);
 }
 
 void
-nv50_disp_root_dtor(struct nvkm_object *object)
+nv50_disp_root_fini(struct nv50_disp_root *root)
 {
-	struct nv50_disp_root *root = (void *)object;
-	nvkm_ramht_del(&root->ramht);
-	nvkm_parent_destroy(&root->base);
+	struct nvkm_device *device = root->disp->base.engine.subdev.device;
+	/* disable all interrupts */
+	nvkm_wr32(device, 0x610024, 0x00000000);
+	nvkm_wr32(device, 0x610020, 0x00000000);
 }
 
-static int
-nv50_disp_root_init(struct nvkm_object *object)
+int
+nv50_disp_root_init(struct nv50_disp_root *root)
 {
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_root *root = (void *)object;
+	struct nv50_disp *disp = root->disp;
 	struct nvkm_device *device = disp->base.engine.subdev.device;
-	int ret, i;
 	u32 tmp;
-
-	ret = nvkm_parent_init(&root->base);
-	if (ret)
-		return ret;
+	int i;
 
 	/* The below segments of code copying values from one register to
 	 * another appear to inform EVO of the display capabilities or
@@ -279,7 +359,7 @@ nv50_disp_root_init(struct nvkm_object *object)
 	}
 
 	/* point at display engine memory area (hash table, objects) */
-	nvkm_wr32(device, 0x610010, (root->ramht->gpuobj->addr >> 8) | 9);
+	nvkm_wr32(device, 0x610010, (root->instmem->addr >> 8) | 9);
 
 	/* enable supervisor interrupts, disable everything else */
 	nvkm_wr32(device, 0x61002c, 0x00000370);
@@ -287,42 +367,33 @@ nv50_disp_root_init(struct nvkm_object *object)
 	return 0;
 }
 
-static int
-nv50_disp_root_fini(struct nvkm_object *object, bool suspend)
-{
-	struct nv50_disp *disp = (void *)object->engine;
-	struct nv50_disp_root *root = (void *)object;
-	struct nvkm_device *device = disp->base.engine.subdev.device;
-
-	/* disable all interrupts */
-	nvkm_wr32(device, 0x610024, 0x00000000);
-	nvkm_wr32(device, 0x610020, 0x00000000);
-
-	return nvkm_parent_fini(&root->base, suspend);
-}
-
-struct nvkm_ofuncs
-nv50_disp_root_ofuncs = {
-	.ctor = nv50_disp_root_ctor,
-	.dtor = nv50_disp_root_dtor,
+static const struct nv50_disp_root_func
+nv50_disp_root = {
 	.init = nv50_disp_root_init,
 	.fini = nv50_disp_root_fini,
-	.mthd = nv50_disp_root_mthd,
-	.ntfy = nvkm_disp_ntfy,
+	.dmac = {
+		&nv50_disp_core_oclass,
+		&nv50_disp_base_oclass,
+		&nv50_disp_ovly_oclass,
+	},
+	.pioc = {
+		&nv50_disp_oimm_oclass,
+		&nv50_disp_curs_oclass,
+	},
 };
 
-struct nvkm_oclass
-nv50_disp_root_oclass[] = {
-	{ NV50_DISP, &nv50_disp_root_ofuncs },
-	{}
-};
+static int
+nv50_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
+		   void *data, u32 size, struct nvkm_object **pobject)
+{
+	return nv50_disp_root_new_(&nv50_disp_root, disp, oclass,
+				   data, size, pobject);
+}
 
-struct nvkm_oclass
-nv50_disp_sclass[] = {
-	{ NV50_DISP_CORE_CHANNEL_DMA, &nv50_disp_core_ofuncs.base },
-	{ NV50_DISP_BASE_CHANNEL_DMA, &nv50_disp_base_ofuncs.base },
-	{ NV50_DISP_OVERLAY_CHANNEL_DMA, &nv50_disp_ovly_ofuncs.base },
-	{ NV50_DISP_OVERLAY, &nv50_disp_oimm_ofuncs.base },
-	{ NV50_DISP_CURSOR, &nv50_disp_curs_ofuncs.base },
-	{}
+const struct nvkm_disp_oclass
+nv50_disp_root_oclass = {
+	.base.oclass = NV50_DISP,
+	.base.minver = -1,
+	.base.maxver = -1,
+	.ctor = nv50_disp_root_new,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h
index 9ae4bf9..5b2c903 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h
@@ -1,36 +1,43 @@
 #ifndef __NV50_DISP_ROOT_H__
 #define __NV50_DISP_ROOT_H__
+#define nv50_disp_root(p) container_of((p), struct nv50_disp_root, object)
 #include "nv50.h"
 #include "channv50.h"
 #include "dmacnv50.h"
-#include <core/parent.h>
-
-#include <nvif/class.h>
 
 struct nv50_disp_root {
-	struct nvkm_parent base;
+	const struct nv50_disp_root_func *func;
+	struct nv50_disp *disp;
+	struct nvkm_object object;
+
+	struct nvkm_gpuobj *instmem;
 	struct nvkm_ramht *ramht;
-	u32 chan;
 };
 
-extern struct nvkm_oclass nv50_disp_root_oclass[];
-extern struct nvkm_oclass nv50_disp_sclass[];
-extern struct nvkm_oclass g84_disp_root_oclass[];
-extern struct nvkm_oclass g84_disp_sclass[];
-extern struct nvkm_oclass g94_disp_root_oclass[];
-extern struct nvkm_oclass g94_disp_sclass[];
-extern struct nvkm_oclass gt200_disp_root_oclass[];
-extern struct nvkm_oclass gt200_disp_sclass[];
-extern struct nvkm_oclass gt215_disp_root_oclass[];
-extern struct nvkm_oclass gt215_disp_sclass[];
-extern struct nvkm_oclass gf119_disp_root_oclass[];
-extern struct nvkm_oclass gf119_disp_sclass[];
-extern struct nvkm_oclass gk104_disp_root_oclass[];
-extern struct nvkm_oclass gk104_disp_sclass[];
-extern struct nvkm_oclass gk110_disp_root_oclass[];
-extern struct nvkm_oclass gk110_disp_sclass[];
-extern struct nvkm_oclass gm107_disp_root_oclass[];
-extern struct nvkm_oclass gm107_disp_sclass[];
-extern struct nvkm_oclass gm204_disp_root_oclass[];
-extern struct nvkm_oclass gm204_disp_sclass[];
+struct nv50_disp_root_func {
+	int (*init)(struct nv50_disp_root *);
+	void (*fini)(struct nv50_disp_root *);
+	const struct nv50_disp_dmac_oclass *dmac[3];
+	const struct nv50_disp_pioc_oclass *pioc[2];
+};
+
+int  nv50_disp_root_new_(const struct nv50_disp_root_func *, struct nvkm_disp *,
+			 const struct nvkm_oclass *, void *data, u32 size,
+			 struct nvkm_object **);
+int  nv50_disp_root_init(struct nv50_disp_root *);
+void nv50_disp_root_fini(struct nv50_disp_root *);
+
+int  gf119_disp_root_init(struct nv50_disp_root *);
+void gf119_disp_root_fini(struct nv50_disp_root *);
+
+extern const struct nvkm_disp_oclass nv50_disp_root_oclass;
+extern const struct nvkm_disp_oclass g84_disp_root_oclass;
+extern const struct nvkm_disp_oclass g94_disp_root_oclass;
+extern const struct nvkm_disp_oclass gt200_disp_root_oclass;
+extern const struct nvkm_disp_oclass gt215_disp_root_oclass;
+extern const struct nvkm_disp_oclass gf119_disp_root_oclass;
+extern const struct nvkm_disp_oclass gk104_disp_root_oclass;
+extern const struct nvkm_disp_oclass gk110_disp_root_oclass;
+extern const struct nvkm_disp_oclass gm107_disp_root_oclass;
+extern const struct nvkm_disp_oclass gm204_disp_root_oclass;
 #endif