drm/nouveau: remove symlinks, move core/ to nvkm/ (no code changes)

The symlinks were annoying some people, and they're not used anywhere
else in the kernel tree.  The include directory structure has been
changed so that symlinks aren't needed anymore.

NVKM has been moved from core/ to nvkm/ to make it more obvious as to
what the directory is for, and as some minor prep for when NVKM gets
split out into its own module (virt) at a later date.

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

6 files changed, 734 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/Kbuild b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/Kbuild
new file mode 100644
index 000000000000..922454f97de2
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/Kbuild
@@ -0,0 +1,4 @@
+nvkm-y += nvkm/subdev/bar/base.o
+nvkm-y += nvkm/subdev/bar/nv50.o
+nvkm-y += nvkm/subdev/bar/nvc0.o
+nvkm-y += nvkm/subdev/bar/gk20a.o
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/base.c
new file mode 100644
index 000000000000..188c638411b2
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/base.c
@@ -0,0 +1,149 @@
+/*
+ * 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 <core/object.h>
+
+#include <subdev/fb.h>
+#include <subdev/vm.h>
+
+#include "priv.h"
+
+struct nouveau_barobj {
+	struct nouveau_object base;
+	struct nouveau_vma vma;
+	void __iomem *iomem;
+};
+
+static int
+nouveau_barobj_ctor(struct nouveau_object *parent,
+		    struct nouveau_object *engine,
+		    struct nouveau_oclass *oclass, void *data, u32 size,
+		    struct nouveau_object **pobject)
+{
+	struct nouveau_device *device = nv_device(parent);
+	struct nouveau_bar *bar = nouveau_bar(device);
+	struct nouveau_mem *mem = data;
+	struct nouveau_barobj *barobj;
+	int ret;
+
+	ret = nouveau_object_create(parent, engine, oclass, 0, &barobj);
+	*pobject = nv_object(barobj);
+	if (ret)
+		return ret;
+
+	ret = bar->kmap(bar, mem, NV_MEM_ACCESS_RW, &barobj->vma);
+	if (ret)
+		return ret;
+
+	barobj->iomem = ioremap(nv_device_resource_start(device, 3) +
+				(u32)barobj->vma.offset, mem->size << 12);
+	if (!barobj->iomem) {
+		nv_warn(bar, "PRAMIN ioremap failed\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void
+nouveau_barobj_dtor(struct nouveau_object *object)
+{
+	struct nouveau_bar *bar = nouveau_bar(object);
+	struct nouveau_barobj *barobj = (void *)object;
+	if (barobj->vma.node) {
+		if (barobj->iomem)
+			iounmap(barobj->iomem);
+		bar->unmap(bar, &barobj->vma);
+	}
+	nouveau_object_destroy(&barobj->base);
+}
+
+static u32
+nouveau_barobj_rd32(struct nouveau_object *object, u64 addr)
+{
+	struct nouveau_barobj *barobj = (void *)object;
+	return ioread32_native(barobj->iomem + addr);
+}
+
+static void
+nouveau_barobj_wr32(struct nouveau_object *object, u64 addr, u32 data)
+{
+	struct nouveau_barobj *barobj = (void *)object;
+	iowrite32_native(data, barobj->iomem + addr);
+}
+
+static struct nouveau_oclass
+nouveau_barobj_oclass = {
+	.ofuncs = &(struct nouveau_ofuncs) {
+		.ctor = nouveau_barobj_ctor,
+		.dtor = nouveau_barobj_dtor,
+		.init = nouveau_object_init,
+		.fini = nouveau_object_fini,
+		.rd32 = nouveau_barobj_rd32,
+		.wr32 = nouveau_barobj_wr32,
+	},
+};
+
+int
+nouveau_bar_alloc(struct nouveau_bar *bar, struct nouveau_object *parent,
+		  struct nouveau_mem *mem, struct nouveau_object **pobject)
+{
+	struct nouveau_object *gpuobj;
+	int ret = nouveau_object_ctor(parent, &parent->engine->subdev.object,
+				      &nouveau_barobj_oclass,
+				      mem, 0, &gpuobj);
+	if (ret == 0)
+		*pobject = gpuobj;
+	return ret;
+}
+
+int
+nouveau_bar_create_(struct nouveau_object *parent,
+		    struct nouveau_object *engine,
+		    struct nouveau_oclass *oclass, int length, void **pobject)
+{
+	struct nouveau_bar *bar;
+	int ret;
+
+	ret = nouveau_subdev_create_(parent, engine, oclass, 0, "BARCTL",
+				     "bar", length, pobject);
+	bar = *pobject;
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+void
+nouveau_bar_destroy(struct nouveau_bar *bar)
+{
+	nouveau_subdev_destroy(&bar->base);
+}
+
+void
+_nouveau_bar_dtor(struct nouveau_object *object)
+{
+	struct nouveau_bar *bar = (void *)object;
+	nouveau_bar_destroy(bar);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gk20a.c
new file mode 100644
index 000000000000..bf877af9d3bd
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gk20a.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2014, 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 <subdev/bar.h>
+
+#include "priv.h"
+
+int
+gk20a_bar_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
+	       struct nouveau_oclass *oclass, void *data, u32 size,
+	       struct nouveau_object **pobject)
+{
+	struct nouveau_bar *bar;
+	int ret;
+
+	ret = nvc0_bar_ctor(parent, engine, oclass, data, size, pobject);
+	if (ret)
+		return ret;
+
+	bar = (struct nouveau_bar *)*pobject;
+	bar->iomap_uncached = true;
+
+	return 0;
+}
+
+struct nouveau_oclass
+gk20a_bar_oclass = {
+	.handle = NV_SUBDEV(BAR, 0xea),
+	.ofuncs = &(struct nouveau_ofuncs) {
+		.ctor = gk20a_bar_ctor,
+		.dtor = nvc0_bar_dtor,
+		.init = nvc0_bar_init,
+		.fini = _nouveau_bar_fini,
+	},
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nv50.c
new file mode 100644
index 000000000000..f748ba49dfc8
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nv50.c
@@ -0,0 +1,273 @@
+/*
+ * 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 <core/gpuobj.h>
+
+#include <subdev/timer.h>
+#include <subdev/fb.h>
+#include <subdev/vm.h>
+
+#include "priv.h"
+
+struct nv50_bar_priv {
+	struct nouveau_bar base;
+	spinlock_t lock;
+	struct nouveau_gpuobj *mem;
+	struct nouveau_gpuobj *pad;
+	struct nouveau_gpuobj *pgd;
+	struct nouveau_vm *bar1_vm;
+	struct nouveau_gpuobj *bar1;
+	struct nouveau_vm *bar3_vm;
+	struct nouveau_gpuobj *bar3;
+};
+
+static int
+nv50_bar_kmap(struct nouveau_bar *bar, struct nouveau_mem *mem,
+	      u32 flags, struct nouveau_vma *vma)
+{
+	struct nv50_bar_priv *priv = (void *)bar;
+	int ret;
+
+	ret = nouveau_vm_get(priv->bar3_vm, mem->size << 12, 12, flags, vma);
+	if (ret)
+		return ret;
+
+	nouveau_vm_map(vma, mem);
+	return 0;
+}
+
+static int
+nv50_bar_umap(struct nouveau_bar *bar, struct nouveau_mem *mem,
+	      u32 flags, struct nouveau_vma *vma)
+{
+	struct nv50_bar_priv *priv = (void *)bar;
+	int ret;
+
+	ret = nouveau_vm_get(priv->bar1_vm, mem->size << 12, 12, flags, vma);
+	if (ret)
+		return ret;
+
+	nouveau_vm_map(vma, mem);
+	return 0;
+}
+
+static void
+nv50_bar_unmap(struct nouveau_bar *bar, struct nouveau_vma *vma)
+{
+	nouveau_vm_unmap(vma);
+	nouveau_vm_put(vma);
+}
+
+static void
+nv50_bar_flush(struct nouveau_bar *bar)
+{
+	struct nv50_bar_priv *priv = (void *)bar;
+	unsigned long flags;
+	spin_lock_irqsave(&priv->lock, flags);
+	nv_wr32(priv, 0x00330c, 0x00000001);
+	if (!nv_wait(priv, 0x00330c, 0x00000002, 0x00000000))
+		nv_warn(priv, "flush timeout\n");
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+void
+nv84_bar_flush(struct nouveau_bar *bar)
+{
+	struct nv50_bar_priv *priv = (void *)bar;
+	unsigned long flags;
+	spin_lock_irqsave(&priv->lock, flags);
+	nv_wr32(bar, 0x070000, 0x00000001);
+	if (!nv_wait(priv, 0x070000, 0x00000002, 0x00000000))
+		nv_warn(priv, "flush timeout\n");
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int
+nv50_bar_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
+	      struct nouveau_oclass *oclass, void *data, u32 size,
+	      struct nouveau_object **pobject)
+{
+	struct nouveau_device *device = nv_device(parent);
+	struct nouveau_object *heap;
+	struct nouveau_vm *vm;
+	struct nv50_bar_priv *priv;
+	u64 start, limit;
+	int ret;
+
+	ret = nouveau_bar_create(parent, engine, oclass, &priv);
+	*pobject = nv_object(priv);
+	if (ret)
+		return ret;
+
+	ret = nouveau_gpuobj_new(nv_object(priv), NULL, 0x20000, 0,
+				 NVOBJ_FLAG_HEAP, &priv->mem);
+	heap = nv_object(priv->mem);
+	if (ret)
+		return ret;
+
+	ret = nouveau_gpuobj_new(nv_object(priv), heap,
+				(device->chipset == 0x50) ? 0x1400 : 0x0200,
+				 0, 0, &priv->pad);
+	if (ret)
+		return ret;
+
+	ret = nouveau_gpuobj_new(nv_object(priv), heap, 0x4000, 0,
+				 0, &priv->pgd);
+	if (ret)
+		return ret;
+
+	/* BAR3 */
+	start = 0x0100000000ULL;
+	limit = start + nv_device_resource_len(device, 3);
+
+	ret = nouveau_vm_new(device, start, limit, start, &vm);
+	if (ret)
+		return ret;
+
+	atomic_inc(&vm->engref[NVDEV_SUBDEV_BAR]);
+
+	ret = nouveau_gpuobj_new(nv_object(priv), heap,
+				 ((limit-- - start) >> 12) * 8, 0x1000,
+				 NVOBJ_FLAG_ZERO_ALLOC, &vm->pgt[0].obj[0]);
+	vm->pgt[0].refcount[0] = 1;
+	if (ret)
+		return ret;
+
+	ret = nouveau_vm_ref(vm, &priv->bar3_vm, priv->pgd);
+	nouveau_vm_ref(NULL, &vm, NULL);
+	if (ret)
+		return ret;
+
+	ret = nouveau_gpuobj_new(nv_object(priv), heap, 24, 16, 0, &priv->bar3);
+	if (ret)
+		return ret;
+
+	nv_wo32(priv->bar3, 0x00, 0x7fc00000);
+	nv_wo32(priv->bar3, 0x04, lower_32_bits(limit));
+	nv_wo32(priv->bar3, 0x08, lower_32_bits(start));
+	nv_wo32(priv->bar3, 0x0c, upper_32_bits(limit) << 24 |
+				  upper_32_bits(start));
+	nv_wo32(priv->bar3, 0x10, 0x00000000);
+	nv_wo32(priv->bar3, 0x14, 0x00000000);
+
+	/* BAR1 */
+	start = 0x0000000000ULL;
+	limit = start + nv_device_resource_len(device, 1);
+
+	ret = nouveau_vm_new(device, start, limit--, start, &vm);
+	if (ret)
+		return ret;
+
+	atomic_inc(&vm->engref[NVDEV_SUBDEV_BAR]);
+
+	ret = nouveau_vm_ref(vm, &priv->bar1_vm, priv->pgd);
+	nouveau_vm_ref(NULL, &vm, NULL);
+	if (ret)
+		return ret;
+
+	ret = nouveau_gpuobj_new(nv_object(priv), heap, 24, 16, 0, &priv->bar1);
+	if (ret)
+		return ret;
+
+	nv_wo32(priv->bar1, 0x00, 0x7fc00000);
+	nv_wo32(priv->bar1, 0x04, lower_32_bits(limit));
+	nv_wo32(priv->bar1, 0x08, lower_32_bits(start));
+	nv_wo32(priv->bar1, 0x0c, upper_32_bits(limit) << 24 |
+				  upper_32_bits(start));
+	nv_wo32(priv->bar1, 0x10, 0x00000000);
+	nv_wo32(priv->bar1, 0x14, 0x00000000);
+
+	priv->base.alloc = nouveau_bar_alloc;
+	priv->base.kmap = nv50_bar_kmap;
+	priv->base.umap = nv50_bar_umap;
+	priv->base.unmap = nv50_bar_unmap;
+	if (device->chipset == 0x50)
+		priv->base.flush = nv50_bar_flush;
+	else
+		priv->base.flush = nv84_bar_flush;
+	spin_lock_init(&priv->lock);
+	return 0;
+}
+
+static void
+nv50_bar_dtor(struct nouveau_object *object)
+{
+	struct nv50_bar_priv *priv = (void *)object;
+	nouveau_gpuobj_ref(NULL, &priv->bar1);
+	nouveau_vm_ref(NULL, &priv->bar1_vm, priv->pgd);
+	nouveau_gpuobj_ref(NULL, &priv->bar3);
+	if (priv->bar3_vm) {
+		nouveau_gpuobj_ref(NULL, &priv->bar3_vm->pgt[0].obj[0]);
+		nouveau_vm_ref(NULL, &priv->bar3_vm, priv->pgd);
+	}
+	nouveau_gpuobj_ref(NULL, &priv->pgd);
+	nouveau_gpuobj_ref(NULL, &priv->pad);
+	nouveau_gpuobj_ref(NULL, &priv->mem);
+	nouveau_bar_destroy(&priv->base);
+}
+
+static int
+nv50_bar_init(struct nouveau_object *object)
+{
+	struct nv50_bar_priv *priv = (void *)object;
+	int ret, i;
+
+	ret = nouveau_bar_init(&priv->base);
+	if (ret)
+		return ret;
+
+	nv_mask(priv, 0x000200, 0x00000100, 0x00000000);
+	nv_mask(priv, 0x000200, 0x00000100, 0x00000100);
+	nv_wr32(priv, 0x100c80, 0x00060001);
+	if (!nv_wait(priv, 0x100c80, 0x00000001, 0x00000000)) {
+		nv_error(priv, "vm flush timeout\n");
+		return -EBUSY;
+	}
+
+	nv_wr32(priv, 0x001704, 0x00000000 | priv->mem->addr >> 12);
+	nv_wr32(priv, 0x001704, 0x40000000 | priv->mem->addr >> 12);
+	nv_wr32(priv, 0x001708, 0x80000000 | priv->bar1->node->offset >> 4);
+	nv_wr32(priv, 0x00170c, 0x80000000 | priv->bar3->node->offset >> 4);
+	for (i = 0; i < 8; i++)
+		nv_wr32(priv, 0x001900 + (i * 4), 0x00000000);
+	return 0;
+}
+
+static int
+nv50_bar_fini(struct nouveau_object *object, bool suspend)
+{
+	struct nv50_bar_priv *priv = (void *)object;
+	return nouveau_bar_fini(&priv->base, suspend);
+}
+
+struct nouveau_oclass
+nv50_bar_oclass = {
+	.handle = NV_SUBDEV(BAR, 0x50),
+	.ofuncs = &(struct nouveau_ofuncs) {
+		.ctor = nv50_bar_ctor,
+		.dtor = nv50_bar_dtor,
+		.init = nv50_bar_init,
+		.fini = nv50_bar_fini,
+	},
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nvc0.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nvc0.c
new file mode 100644
index 000000000000..8320ee0509c3
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nvc0.c
@@ -0,0 +1,222 @@
+/*
+ * 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 <core/gpuobj.h>
+
+#include <subdev/timer.h>
+#include <subdev/fb.h>
+#include <subdev/vm.h>
+
+#include "priv.h"
+
+struct nvc0_bar_priv_vm {
+	struct nouveau_gpuobj *mem;
+	struct nouveau_gpuobj *pgd;
+	struct nouveau_vm *vm;
+};
+
+struct nvc0_bar_priv {
+	struct nouveau_bar base;
+	spinlock_t lock;
+	struct nvc0_bar_priv_vm bar[2];
+};
+
+static int
+nvc0_bar_kmap(struct nouveau_bar *bar, struct nouveau_mem *mem,
+	      u32 flags, struct nouveau_vma *vma)
+{
+	struct nvc0_bar_priv *priv = (void *)bar;
+	int ret;
+
+	ret = nouveau_vm_get(priv->bar[0].vm, mem->size << 12, 12, flags, vma);
+	if (ret)
+		return ret;
+
+	nouveau_vm_map(vma, mem);
+	return 0;
+}
+
+static int
+nvc0_bar_umap(struct nouveau_bar *bar, struct nouveau_mem *mem,
+	      u32 flags, struct nouveau_vma *vma)
+{
+	struct nvc0_bar_priv *priv = (void *)bar;
+	int ret;
+
+	ret = nouveau_vm_get(priv->bar[1].vm, mem->size << 12,
+			     mem->page_shift, flags, vma);
+	if (ret)
+		return ret;
+
+	nouveau_vm_map(vma, mem);
+	return 0;
+}
+
+static void
+nvc0_bar_unmap(struct nouveau_bar *bar, struct nouveau_vma *vma)
+{
+	nouveau_vm_unmap(vma);
+	nouveau_vm_put(vma);
+}
+
+static int
+nvc0_bar_init_vm(struct nvc0_bar_priv *priv, struct nvc0_bar_priv_vm *bar_vm,
+		 int bar_nr)
+{
+	struct nouveau_device *device = nv_device(&priv->base);
+	struct nouveau_vm *vm;
+	resource_size_t bar_len;
+	int ret;
+
+	ret = nouveau_gpuobj_new(nv_object(priv), NULL, 0x1000, 0, 0,
+				&bar_vm->mem);
+	if (ret)
+		return ret;
+
+	ret = nouveau_gpuobj_new(nv_object(priv), NULL, 0x8000, 0, 0,
+				&bar_vm->pgd);
+	if (ret)
+		return ret;
+
+	bar_len = nv_device_resource_len(device, bar_nr);
+
+	ret = nouveau_vm_new(device, 0, bar_len, 0, &vm);
+	if (ret)
+		return ret;
+
+	atomic_inc(&vm->engref[NVDEV_SUBDEV_BAR]);
+
+	/*
+	 * Bootstrap page table lookup.
+	 */
+	if (bar_nr == 3) {
+		ret = nouveau_gpuobj_new(nv_object(priv), NULL,
+					 (bar_len >> 12) * 8, 0x1000,
+					 NVOBJ_FLAG_ZERO_ALLOC,
+					&vm->pgt[0].obj[0]);
+		vm->pgt[0].refcount[0] = 1;
+		if (ret)
+			return ret;
+	}
+
+	ret = nouveau_vm_ref(vm, &bar_vm->vm, bar_vm->pgd);
+	nouveau_vm_ref(NULL, &vm, NULL);
+	if (ret)
+		return ret;
+
+	nv_wo32(bar_vm->mem, 0x0200, lower_32_bits(bar_vm->pgd->addr));
+	nv_wo32(bar_vm->mem, 0x0204, upper_32_bits(bar_vm->pgd->addr));
+	nv_wo32(bar_vm->mem, 0x0208, lower_32_bits(bar_len - 1));
+	nv_wo32(bar_vm->mem, 0x020c, upper_32_bits(bar_len - 1));
+
+	return 0;
+}
+
+int
+nvc0_bar_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
+	      struct nouveau_oclass *oclass, void *data, u32 size,
+	      struct nouveau_object **pobject)
+{
+	struct nouveau_device *device = nv_device(parent);
+	struct nvc0_bar_priv *priv;
+	bool has_bar3 = nv_device_resource_len(device, 3) != 0;
+	int ret;
+
+	ret = nouveau_bar_create(parent, engine, oclass, &priv);
+	*pobject = nv_object(priv);
+	if (ret)
+		return ret;
+
+	/* BAR3 */
+	if (has_bar3) {
+		ret = nvc0_bar_init_vm(priv, &priv->bar[0], 3);
+		if (ret)
+			return ret;
+	}
+
+	/* BAR1 */
+	ret = nvc0_bar_init_vm(priv, &priv->bar[1], 1);
+	if (ret)
+		return ret;
+
+	if (has_bar3) {
+		priv->base.alloc = nouveau_bar_alloc;
+		priv->base.kmap = nvc0_bar_kmap;
+	}
+	priv->base.umap = nvc0_bar_umap;
+	priv->base.unmap = nvc0_bar_unmap;
+	priv->base.flush = nv84_bar_flush;
+	spin_lock_init(&priv->lock);
+	return 0;
+}
+
+void
+nvc0_bar_dtor(struct nouveau_object *object)
+{
+	struct nvc0_bar_priv *priv = (void *)object;
+
+	nouveau_vm_ref(NULL, &priv->bar[1].vm, priv->bar[1].pgd);
+	nouveau_gpuobj_ref(NULL, &priv->bar[1].pgd);
+	nouveau_gpuobj_ref(NULL, &priv->bar[1].mem);
+
+	if (priv->bar[0].vm) {
+		nouveau_gpuobj_ref(NULL, &priv->bar[0].vm->pgt[0].obj[0]);
+		nouveau_vm_ref(NULL, &priv->bar[0].vm, priv->bar[0].pgd);
+	}
+	nouveau_gpuobj_ref(NULL, &priv->bar[0].pgd);
+	nouveau_gpuobj_ref(NULL, &priv->bar[0].mem);
+
+	nouveau_bar_destroy(&priv->base);
+}
+
+int
+nvc0_bar_init(struct nouveau_object *object)
+{
+	struct nvc0_bar_priv *priv = (void *)object;
+	int ret;
+
+	ret = nouveau_bar_init(&priv->base);
+	if (ret)
+		return ret;
+
+	nv_mask(priv, 0x000200, 0x00000100, 0x00000000);
+	nv_mask(priv, 0x000200, 0x00000100, 0x00000100);
+
+	nv_wr32(priv, 0x001704, 0x80000000 | priv->bar[1].mem->addr >> 12);
+	if (priv->bar[0].mem)
+		nv_wr32(priv, 0x001714,
+			0xc0000000 | priv->bar[0].mem->addr >> 12);
+	return 0;
+}
+
+struct nouveau_oclass
+nvc0_bar_oclass = {
+	.handle = NV_SUBDEV(BAR, 0xc0),
+	.ofuncs = &(struct nouveau_ofuncs) {
+		.ctor = nvc0_bar_ctor,
+		.dtor = nvc0_bar_dtor,
+		.init = nvc0_bar_init,
+		.fini = _nouveau_bar_fini,
+	},
+};
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/priv.h b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/priv.h
new file mode 100644
index 000000000000..3ee8b1476d00
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/priv.h
@@ -0,0 +1,32 @@
+#ifndef __NVKM_BAR_PRIV_H__
+#define __NVKM_BAR_PRIV_H__
+
+#include <subdev/bar.h>
+
+#define nouveau_bar_create(p,e,o,d)                                            \
+	nouveau_bar_create_((p), (e), (o), sizeof(**d), (void **)d)
+#define nouveau_bar_init(p)                                                    \
+	nouveau_subdev_init(&(p)->base)
+#define nouveau_bar_fini(p,s)                                                  \
+	nouveau_subdev_fini(&(p)->base, (s))
+
+int nouveau_bar_create_(struct nouveau_object *, struct nouveau_object *,
+			struct nouveau_oclass *, int, void **);
+void nouveau_bar_destroy(struct nouveau_bar *);
+
+void _nouveau_bar_dtor(struct nouveau_object *);
+#define _nouveau_bar_init _nouveau_subdev_init
+#define _nouveau_bar_fini _nouveau_subdev_fini
+
+int  nouveau_bar_alloc(struct nouveau_bar *, struct nouveau_object *,
+		       struct nouveau_mem *, struct nouveau_object **);
+
+void nv84_bar_flush(struct nouveau_bar *);
+
+int nvc0_bar_ctor(struct nouveau_object *, struct nouveau_object *,
+		  struct nouveau_oclass *, void *, u32,
+		  struct nouveau_object **);
+void nvc0_bar_dtor(struct nouveau_object *);
+int nvc0_bar_init(struct nouveau_object *);
+
+#endif