diff --git a/drm/nouveau/include/nvkm/engine/gr.h b/drm/nouveau/include/nvkm/engine/gr.h
index 7cbe202..c772497 100644
--- a/drm/nouveau/include/nvkm/engine/gr.h
+++ b/drm/nouveau/include/nvkm/engine/gr.h
@@ -74,6 +74,7 @@ extern struct nvkm_oclass *gk208_gr_oclass;
 extern struct nvkm_oclass *gm107_gr_oclass;
 extern struct nvkm_oclass *gm204_gr_oclass;
 extern struct nvkm_oclass *gm206_gr_oclass;
+extern struct nvkm_oclass *gm20b_gr_oclass;
 
 #include <core/enum.h>
 
diff --git a/drm/nouveau/nvkm/engine/gr/Kbuild b/drm/nouveau/nvkm/engine/gr/Kbuild
index 2e1b92f..e91b4df 100644
--- a/drm/nouveau/nvkm/engine/gr/Kbuild
+++ b/drm/nouveau/nvkm/engine/gr/Kbuild
@@ -14,6 +14,7 @@ nvkm-y += nvkm/engine/gr/ctxgk208.o
 nvkm-y += nvkm/engine/gr/ctxgm107.o
 nvkm-y += nvkm/engine/gr/ctxgm204.o
 nvkm-y += nvkm/engine/gr/ctxgm206.o
+nvkm-y += nvkm/engine/gr/ctxgm20b.o
 nvkm-y += nvkm/engine/gr/nv04.o
 nvkm-y += nvkm/engine/gr/nv10.o
 nvkm-y += nvkm/engine/gr/nv20.o
@@ -38,3 +39,4 @@ nvkm-y += nvkm/engine/gr/gk208.o
 nvkm-y += nvkm/engine/gr/gm107.o
 nvkm-y += nvkm/engine/gr/gm204.o
 nvkm-y += nvkm/engine/gr/gm206.o
+nvkm-y += nvkm/engine/gr/gm20b.o
diff --git a/drm/nouveau/nvkm/engine/gr/ctxgf100.h b/drm/nouveau/nvkm/engine/gr/ctxgf100.h
index 3676a33..f89ab37 100644
--- a/drm/nouveau/nvkm/engine/gr/ctxgf100.h
+++ b/drm/nouveau/nvkm/engine/gr/ctxgf100.h
@@ -91,6 +91,10 @@ void gk104_grctx_generate_r418bb8(struct gf100_gr_priv *);
 void gk104_grctx_generate_rop_active_fbps(struct gf100_gr_priv *);
 
 
+void gm107_grctx_generate_bundle(struct gf100_grctx *);
+void gm107_grctx_generate_pagepool(struct gf100_grctx *);
+void gm107_grctx_generate_attrib(struct gf100_grctx *);
+
 extern struct nvkm_oclass *gk110_grctx_oclass;
 extern struct nvkm_oclass *gk110b_grctx_oclass;
 extern struct nvkm_oclass *gk208_grctx_oclass;
@@ -102,8 +106,11 @@ void gm107_grctx_generate_attrib(struct gf100_grctx *);
 
 extern struct nvkm_oclass *gm204_grctx_oclass;
 void gm204_grctx_generate_main(struct gf100_gr_priv *, struct gf100_grctx *);
+void gm204_grctx_generate_tpcid(struct gf100_gr_priv *);
+void gm204_grctx_generate_405b60(struct gf100_gr_priv *);
 
 extern struct nvkm_oclass *gm206_grctx_oclass;
+extern struct nvkm_oclass *gm20b_grctx_oclass;
 
 /* context init value lists */
 
diff --git a/drm/nouveau/nvkm/engine/gr/ctxgm107.c b/drm/nouveau/nvkm/engine/gr/ctxgm107.c
index fbeaae3..6bf2fd1 100644
--- a/drm/nouveau/nvkm/engine/gr/ctxgm107.c
+++ b/drm/nouveau/nvkm/engine/gr/ctxgm107.c
@@ -931,7 +931,7 @@ gm107_grctx_generate_attrib(struct gf100_grctx *info)
 	}
 }
 
-static void
+void
 gm107_grctx_generate_tpcid(struct gf100_gr_priv *priv)
 {
 	int gpc, tpc, id;
diff --git a/drm/nouveau/nvkm/engine/gr/ctxgm204.c b/drm/nouveau/nvkm/engine/gr/ctxgm204.c
index ea8e661..efc76bf 100644
--- a/drm/nouveau/nvkm/engine/gr/ctxgm204.c
+++ b/drm/nouveau/nvkm/engine/gr/ctxgm204.c
@@ -918,7 +918,7 @@ gm204_grctx_pack_ppc[] = {
  * PGRAPH context implementation
  ******************************************************************************/
 
-static void
+void
 gm204_grctx_generate_tpcid(struct gf100_gr_priv *priv)
 {
 	int gpc, tpc, id;
@@ -943,7 +943,7 @@ gm204_grctx_generate_rop_active_fbps(struct gf100_gr_priv *priv)
 	nv_mask(priv, 0x408958, 0x0000000f, fbp_count); /* crop */
 }
 
-static void
+void
 gm204_grctx_generate_405b60(struct gf100_gr_priv *priv)
 {
 	const u32 dist_nr = DIV_ROUND_UP(priv->tpc_total, 4);
diff --git a/drm/nouveau/nvkm/engine/gr/ctxgm20b.c b/drm/nouveau/nvkm/engine/gr/ctxgm20b.c
new file mode 100644
index 0000000..c011bf3
--- /dev/null
+++ b/drm/nouveau/nvkm/engine/gr/ctxgm20b.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include "ctxgf100.h"
+
+static void
+gm20b_grctx_generate_r406028(struct gf100_gr_priv *priv)
+{
+	u32 tpc_per_gpc = 0;
+	int i;
+
+	for (i = 0; i < priv->gpc_nr; i++)
+		tpc_per_gpc |= priv->tpc_nr[i] << (4 * i);
+
+	nv_wr32(priv, 0x406028, tpc_per_gpc);
+	nv_wr32(priv, 0x405870, tpc_per_gpc);
+}
+
+static void
+gm20b_grctx_generate_main(struct gf100_gr_priv *priv, struct gf100_grctx *info)
+{
+	struct gf100_grctx_oclass *oclass = (void *)nv_engine(priv)->cclass;
+	int idle_timeout_save;
+	int i, tmp;
+
+	gf100_gr_mmio(priv, priv->fuc_sw_ctx);
+
+	gf100_gr_wait_idle(priv);
+
+	idle_timeout_save = nv_rd32(priv, 0x404154);
+	nv_wr32(priv, 0x404154, 0x00000000);
+
+	oclass->attrib(info);
+
+	oclass->unkn(priv);
+
+	gm204_grctx_generate_tpcid(priv);
+	gm20b_grctx_generate_r406028(priv);
+	gk104_grctx_generate_r418bb8(priv);
+
+	for (i = 0; i < 8; i++)
+		nv_wr32(priv, 0x4064d0 + (i * 0x04), 0x00000000);
+
+	nv_wr32(priv, 0x405b00, (priv->tpc_total << 8) | priv->gpc_nr);
+
+	gk104_grctx_generate_rop_active_fbps(priv);
+	nv_wr32(priv, 0x408908, nv_rd32(priv, 0x410108) | 0x80000000);
+
+	for (tmp = 0, i = 0; i < priv->gpc_nr; i++)
+		tmp |= ((1 << priv->tpc_nr[i]) - 1) << (i * 4);
+	nv_wr32(priv, 0x4041c4, tmp);
+
+	gm204_grctx_generate_405b60(priv);
+
+	gf100_gr_wait_idle(priv);
+
+	nv_wr32(priv, 0x404154, idle_timeout_save);
+	gf100_gr_wait_idle(priv);
+
+	gf100_gr_mthd(priv, priv->fuc_method);
+	gf100_gr_wait_idle(priv);
+
+	gf100_gr_icmd(priv, priv->fuc_bundle);
+	oclass->pagepool(info);
+	oclass->bundle(info);
+}
+
+struct nvkm_oclass *
+gm20b_grctx_oclass = &(struct gf100_grctx_oclass) {
+	.base.handle = NV_ENGCTX(GR, 0x2b),
+	.base.ofuncs = &(struct nvkm_ofuncs) {
+		.ctor = gf100_gr_context_ctor,
+		.dtor = gf100_gr_context_dtor,
+		.init = _nvkm_gr_context_init,
+		.fini = _nvkm_gr_context_fini,
+		.rd32 = _nvkm_gr_context_rd32,
+		.wr32 = _nvkm_gr_context_wr32,
+	},
+	.main  = gm20b_grctx_generate_main,
+	.unkn  = gk104_grctx_generate_unkn,
+	.bundle = gm107_grctx_generate_bundle,
+	.bundle_size = 0x1800,
+	.bundle_min_gpm_fifo_depth = 0x182,
+	.bundle_token_limit = 0x1c0,
+	.pagepool = gm107_grctx_generate_pagepool,
+	.pagepool_size = 0x8000,
+	.attrib = gm107_grctx_generate_attrib,
+	.attrib_nr_max = 0x600,
+	.attrib_nr = 0x400,
+	.alpha_nr_max = 0xc00,
+	.alpha_nr = 0x800,
+}.base;
\ No newline at end of file
diff --git a/drm/nouveau/nvkm/engine/gr/gf100.c b/drm/nouveau/nvkm/engine/gr/gf100.c
index d5c148f..359501f 100644
--- a/drm/nouveau/nvkm/engine/gr/gf100.c
+++ b/drm/nouveau/nvkm/engine/gr/gf100.c
@@ -1720,6 +1720,7 @@ gf100_gr_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	case 0xd7:
 	case 0xd9: /* 1/0/0/0, 1 */
 	case 0xea: /* gk20a */
+	case 0x12b: /* gm20b */
 		priv->magic_not_rop_nr = 0x01;
 		break;
 	}
diff --git a/drm/nouveau/nvkm/engine/gr/gf100.h b/drm/nouveau/nvkm/engine/gr/gf100.h
index af4d70f..719c7ab 100644
--- a/drm/nouveau/nvkm/engine/gr/gf100.h
+++ b/drm/nouveau/nvkm/engine/gr/gf100.h
@@ -141,6 +141,12 @@ int  gk104_gr_ctor(struct nvkm_object *, struct nvkm_object *,
 		     struct nvkm_object **);
 int  gk104_gr_init(struct nvkm_object *);
 
+int  gk20a_gr_ctor(struct nvkm_object *, struct nvkm_object *,
+		     struct nvkm_oclass *, void *data, u32 size,
+		     struct nvkm_object **);
+void gk20a_gr_dtor(struct nvkm_object *);
+int  gk20a_gr_init(struct nvkm_object *);
+
 int  gm204_gr_init(struct nvkm_object *);
 
 extern struct nvkm_ofuncs gf100_fermi_ofuncs;
diff --git a/drm/nouveau/nvkm/engine/gr/gk20a.c b/drm/nouveau/nvkm/engine/gr/gk20a.c
index 65f1089..0c6bf83 100644
--- a/drm/nouveau/nvkm/engine/gr/gk20a.c
+++ b/drm/nouveau/nvkm/engine/gr/gk20a.c
@@ -154,7 +154,7 @@ gk20a_gr_av_to_method(struct gf100_gr_fuc *fuc)
 	return pack;
 }
 
-static int
+int
 gk20a_gr_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	      struct nvkm_oclass *oclass, void *data, u32 size,
 	      struct nvkm_object **pobject)
@@ -204,7 +204,7 @@ gk20a_gr_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	return 0;
 }
 
-static void
+void
 gk20a_gr_dtor(struct nvkm_object *object)
 {
 	struct gf100_gr_priv *priv = (void *)object;
@@ -240,7 +240,7 @@ gk20a_gr_set_hww_esr_report_mask(struct gf100_gr_priv *priv)
 	nv_wr32(priv, 0x419e4c, 0x7f);
 }
 
-static int
+int
 gk20a_gr_init(struct nvkm_object *object)
 {
 	struct gk20a_gr_oclass *oclass = (void *)object->oclass;
diff --git a/drm/nouveau/nvkm/engine/gr/gm20b.c b/drm/nouveau/nvkm/engine/gr/gm20b.c
new file mode 100644
index 0000000..8976280
--- /dev/null
+++ b/drm/nouveau/nvkm/engine/gr/gm20b.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include "gk20a.h"
+#include "ctxgf100.h"
+
+#include <nvif/class.h>
+#include <subdev/timer.h>
+
+static struct nvkm_oclass
+gm20b_gr_sclass[] = {
+	{ FERMI_TWOD_A, &nvkm_object_ofuncs },
+	{ KEPLER_INLINE_TO_MEMORY_B, &nvkm_object_ofuncs },
+	{ MAXWELL_B, &gf100_fermi_ofuncs, gf100_gr_9097_omthds },
+	{ MAXWELL_COMPUTE_B, &nvkm_object_ofuncs, gf100_gr_90c0_omthds },
+	{}
+};
+
+static void
+gm20b_gr_init_gpc_mmu(struct gf100_gr_priv *priv)
+{
+	u32 val;
+
+	/* TODO this needs to be removed once secure boot works */
+	if (1) {
+		nv_wr32(priv, 0x100ce4, 0xffffffff);
+	}
+
+	/* TODO update once secure boot works */
+	val = nv_rd32(priv, 0x100c80);
+	val &= 0xf000087f;
+	nv_wr32(priv, 0x418880, val);
+	nv_wr32(priv, 0x418890, 0);
+	nv_wr32(priv, 0x418894, 0);
+
+	nv_wr32(priv, 0x4188b0, nv_rd32(priv, 0x100cc4));
+	nv_wr32(priv, 0x4188b4, nv_rd32(priv, 0x100cc8));
+	nv_wr32(priv, 0x4188b8, nv_rd32(priv, 0x100ccc));
+
+	nv_wr32(priv, 0x4188ac, nv_rd32(priv, 0x100800));
+}
+
+static void
+gm20b_gr_set_hww_esr_report_mask(struct gf100_gr_priv *priv)
+{
+	nv_wr32(priv, 0x419e44, 0xdffffe);
+	nv_wr32(priv, 0x419e4c, 0x5);
+}
+
+struct nvkm_oclass *
+gm20b_gr_oclass = &(struct gk20a_gr_oclass) {
+	.gf100 = {
+		.base.handle = NV_ENGINE(GR, 0x2b),
+		.base.ofuncs = &(struct nvkm_ofuncs) {
+			.ctor = gk20a_gr_ctor,
+			.dtor = gf100_gr_dtor,
+			.init = gk20a_gr_init,
+			.fini = _nvkm_gr_fini,
+		},
+		.cclass = &gm20b_grctx_oclass,
+		.sclass = gm20b_gr_sclass,
+		.ppc_nr = 1,
+	},
+	.init_gpc_mmu = gm20b_gr_init_gpc_mmu,
+	.set_hww_esr_report_mask = gm20b_gr_set_hww_esr_report_mask,
+}.gf100.base;
