drm/nouveau/mmu/gk20a: fork from gf100

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

drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h

@@ -70,4 +70,5 @@ int nv50_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
 int g84_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
 int gf100_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
 int gk104_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
+int gk20a_mmu_new(struct nvkm_device *, int, struct nvkm_mmu **);
 #endif

drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

@@ -1790,7 +1790,7 @@ nvea_chipset = {
 	.imem = gk20a_instmem_new,
 	.ltc = gk104_ltc_new,
 	.mc = gk20a_mc_new,
-	.mmu = gf100_mmu_new,
+	.mmu = gk20a_mmu_new,
 	.pmu = gk20a_pmu_new,
 	.timer = gk20a_timer_new,
 	.top = gk104_top_new,

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/Kbuild

@@ -6,3 +6,4 @@ nvkm-y += nvkm/subdev/mmu/nv50.o
 nvkm-y += nvkm/subdev/mmu/g84.o
 nvkm-y += nvkm/subdev/mmu/gf100.o
 nvkm-y += nvkm/subdev/mmu/gk104.o
+nvkm-y += nvkm/subdev/mmu/gk20a.o

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gk20a.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2017 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.
+ */
+#include "priv.h"
+
+static const struct nvkm_mmu_func
+gk20a_mmu = {
+	.limit = (1ULL << 40),
+	.dma_bits = 40,
+	.pgt_bits  = 27 - 12,
+	.spg_shift = 12,
+	.lpg_shift = 17,
+	.create = gf100_vm_create,
+	.map_pgt = gf100_vm_map_pgt,
+	.map = gf100_vm_map,
+	.map_sg = gf100_vm_map_sg,
+	.unmap = gf100_vm_unmap,
+	.flush = gf100_vm_flush,
+};
+
+int
+gk20a_mmu_new(struct nvkm_device *device, int index, struct nvkm_mmu **pmmu)
+{
+	return nvkm_mmu_new_(&gk20a_mmu, device, index, pmmu);
+}