From: Ben Skeggs <bskeggs@redhat.com>
Date: Wed, 1 Nov 2017 03:56:19 +1000
Subject: drm/nouveau/mmu: define user interfaces to mmu vmm opertaions
Git-commit: 920d2b5ef2157e169d85cb778feca558c56b8370
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/nouveau/include/nvif/if000c.h | 61 ++++
drivers/gpu/drm/nouveau/include/nvif/vmm.h | 42 ++
drivers/gpu/drm/nouveau/nvif/Kbuild | 1
drivers/gpu/drm/nouveau/nvif/vmm.c | 167 +++++++++++
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/Kbuild | 1
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/ummu.c | 9
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c | 352 +++++++++++++++++++++++++
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.h | 14
8 files changed, 647 insertions(+)
--- a/drivers/gpu/drm/nouveau/include/nvif/if000c.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/if000c.h
@@ -1,3 +1,64 @@
#ifndef __NVIF_IF000C_H__
#define __NVIF_IF000C_H__
+struct nvif_vmm_v0 {
+ __u8 version;
+ __u8 page_nr;
+ __u8 pad02[6];
+ __u64 addr;
+ __u64 size;
+ __u8 data[];
+};
+
+#define NVIF_VMM_V0_PAGE 0x00
+#define NVIF_VMM_V0_GET 0x01
+#define NVIF_VMM_V0_PUT 0x02
+#define NVIF_VMM_V0_MAP 0x03
+#define NVIF_VMM_V0_UNMAP 0x04
+
+struct nvif_vmm_page_v0 {
+ __u8 version;
+ __u8 index;
+ __u8 shift;
+ __u8 sparse;
+ __u8 vram;
+ __u8 host;
+ __u8 comp;
+ __u8 pad07[1];
+};
+
+struct nvif_vmm_get_v0 {
+ __u8 version;
+#define NVIF_VMM_GET_V0_ADDR 0x00
+#define NVIF_VMM_GET_V0_PTES 0x01
+#define NVIF_VMM_GET_V0_LAZY 0x02
+ __u8 type;
+ __u8 sparse;
+ __u8 page;
+ __u8 align;
+ __u8 pad05[3];
+ __u64 size;
+ __u64 addr;
+};
+
+struct nvif_vmm_put_v0 {
+ __u8 version;
+ __u8 pad01[7];
+ __u64 addr;
+};
+
+struct nvif_vmm_map_v0 {
+ __u8 version;
+ __u8 pad01[7];
+ __u64 addr;
+ __u64 size;
+ __u64 memory;
+ __u64 offset;
+ __u8 data[];
+};
+
+struct nvif_vmm_unmap_v0 {
+ __u8 version;
+ __u8 pad01[7];
+ __u64 addr;
+};
#endif
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/include/nvif/vmm.h
@@ -0,0 +1,42 @@
+#ifndef __NVIF_VMM_H__
+#define __NVIF_VMM_H__
+#include <nvif/object.h>
+struct nvif_mem;
+struct nvif_mmu;
+
+enum nvif_vmm_get {
+ ADDR,
+ PTES,
+ LAZY
+};
+
+struct nvif_vma {
+ u64 addr;
+ u64 size;
+};
+
+struct nvif_vmm {
+ struct nvif_object object;
+ u64 start;
+ u64 limit;
+
+ struct {
+ u8 shift;
+ bool sparse:1;
+ bool vram:1;
+ bool host:1;
+ bool comp:1;
+ } *page;
+ int page_nr;
+};
+
+int nvif_vmm_init(struct nvif_mmu *, s32 oclass, u64 addr, u64 size,
+ void *argv, u32 argc, struct nvif_vmm *);
+void nvif_vmm_fini(struct nvif_vmm *);
+int nvif_vmm_get(struct nvif_vmm *, enum nvif_vmm_get, bool sparse,
+ u8 page, u8 align, u64 size, struct nvif_vma *);
+void nvif_vmm_put(struct nvif_vmm *, struct nvif_vma *);
+int nvif_vmm_map(struct nvif_vmm *, u64 addr, u64 size, void *argv, u32 argc,
+ struct nvif_mem *, u64 offset);
+int nvif_vmm_unmap(struct nvif_vmm *, u64);
+#endif
--- a/drivers/gpu/drm/nouveau/nvif/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvif/Kbuild
@@ -5,3 +5,4 @@ nvif-y += nvif/driver.o
nvif-y += nvif/mem.o
nvif-y += nvif/mmu.o
nvif-y += nvif/notify.o
+nvif-y += nvif/vmm.o
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvif/vmm.c
@@ -0,0 +1,167 @@
+/*
+ * 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 <nvif/vmm.h>
+#include <nvif/mem.h>
+
+#include <nvif/if000c.h>
+
+int
+nvif_vmm_unmap(struct nvif_vmm *vmm, u64 addr)
+{
+ return nvif_object_mthd(&vmm->object, NVIF_VMM_V0_UNMAP,
+ &(struct nvif_vmm_unmap_v0) { .addr = addr },
+ sizeof(struct nvif_vmm_unmap_v0));
+}
+
+int
+nvif_vmm_map(struct nvif_vmm *vmm, u64 addr, u64 size, void *argv, u32 argc,
+ struct nvif_mem *mem, u64 offset)
+{
+ struct nvif_vmm_map_v0 *args;
+ u8 stack[16];
+ int ret;
+
+ if (sizeof(*args) + argc > sizeof(stack)) {
+ if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
+ return -ENOMEM;
+ } else {
+ args = (void *)stack;
+ }
+
+ args->version = 0;
+ args->addr = addr;
+ args->size = size;
+ args->memory = nvif_handle(&mem->object);
+ args->offset = offset;
+ memcpy(args->data, argv, argc);
+
+ ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_MAP,
+ args, sizeof(*args) + argc);
+ if (args != (void *)stack)
+ kfree(args);
+ return ret;
+}
+
+void
+nvif_vmm_put(struct nvif_vmm *vmm, struct nvif_vma *vma)
+{
+ if (vma->size) {
+ WARN_ON(nvif_object_mthd(&vmm->object, NVIF_VMM_V0_PUT,
+ &(struct nvif_vmm_put_v0) {
+ .addr = vma->addr,
+ }, sizeof(struct nvif_vmm_put_v0)));
+ vma->size = 0;
+ }
+}
+
+int
+nvif_vmm_get(struct nvif_vmm *vmm, enum nvif_vmm_get type, bool sparse,
+ u8 page, u8 align, u64 size, struct nvif_vma *vma)
+{
+ struct nvif_vmm_get_v0 args;
+ int ret;
+
+ args.version = vma->size = 0;
+ args.sparse = sparse;
+ args.page = page;
+ args.align = align;
+ args.size = size;
+
+ switch (type) {
+ case ADDR: args.type = NVIF_VMM_GET_V0_ADDR; break;
+ case PTES: args.type = NVIF_VMM_GET_V0_PTES; break;
+ case LAZY: args.type = NVIF_VMM_GET_V0_LAZY; break;
+ default:
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_GET,
+ &args, sizeof(args));
+ if (ret == 0) {
+ vma->addr = args.addr;
+ vma->size = args.size;
+ }
+ return ret;
+}
+
+void
+nvif_vmm_fini(struct nvif_vmm *vmm)
+{
+ kfree(vmm->page);
+ nvif_object_fini(&vmm->object);
+}
+
+int
+nvif_vmm_init(struct nvif_mmu *mmu, s32 oclass, u64 addr, u64 size,
+ void *argv, u32 argc, struct nvif_vmm *vmm)
+{
+ struct nvif_vmm_v0 *args;
+ u32 argn = sizeof(*args) + argc;
+ int ret = -ENOSYS, i;
+
+ vmm->object.client = NULL;
+ vmm->page = NULL;
+
+ if (!(args = kmalloc(argn, GFP_KERNEL)))
+ return -ENOMEM;
+ args->version = 0;
+ args->addr = addr;
+ args->size = size;
+ memcpy(args->data, argv, argc);
+
+ ret = nvif_object_init(&mmu->object, 0, oclass, args, argn,
+ &vmm->object);
+ if (ret)
+ goto done;
+
+ vmm->start = args->addr;
+ vmm->limit = args->size;
+
+ vmm->page_nr = args->page_nr;
+ vmm->page = kmalloc(sizeof(*vmm->page) * vmm->page_nr, GFP_KERNEL);
+ if (!vmm->page) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ for (i = 0; i < vmm->page_nr; i++) {
+ struct nvif_vmm_page_v0 args = { .index = i };
+
+ ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_PAGE,
+ &args, sizeof(args));
+ if (ret)
+ break;
+
+ vmm->page[i].shift = args.shift;
+ vmm->page[i].sparse = args.sparse;
+ vmm->page[i].vram = args.vram;
+ vmm->page[i].host = args.host;
+ vmm->page[i].comp = args.comp;
+ }
+
+done:
+ if (ret)
+ nvif_vmm_fini(vmm);
+ kfree(args);
+ return ret;
+}
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/Kbuild
@@ -32,3 +32,4 @@ nvkm-y += nvkm/subdev/mmu/vmmgp10b.o
nvkm-y += nvkm/subdev/mmu/umem.o
nvkm-y += nvkm/subdev/mmu/ummu.o
+nvkm-y += nvkm/subdev/mmu/uvmm.o
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/ummu.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/ummu.c
@@ -21,6 +21,7 @@
*/
#include "ummu.h"
#include "umem.h"
+#include "uvmm.h"
#include <core/client.h>
@@ -40,6 +41,14 @@ nvkm_ummu_sclass(struct nvkm_object *obj
return 0;
}
}
+
+ if (mmu->func->vmm.user.oclass) {
+ if (index-- == 0) {
+ oclass->base = mmu->func->vmm.user;
+ oclass->ctor = nvkm_uvmm_new;
+ return 0;
+ }
+ }
return -EINVAL;
}
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
@@ -0,0 +1,352 @@
+/*
+ * 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 "uvmm.h"
+#include "umem.h"
+#include "ummu.h"
+
+#include <core/client.h>
+#include <core/memory.h>
+
+#include <nvif/if000c.h>
+#include <nvif/unpack.h>
+
+static const struct nvkm_object_func nvkm_uvmm;
+struct nvkm_vmm *
+nvkm_uvmm_search(struct nvkm_client *client, u64 handle)
+{
+ struct nvkm_object *object;
+
+ object = nvkm_object_search(client, handle, &nvkm_uvmm);
+ if (IS_ERR(object))
+ return (void *)object;
+
+ return nvkm_uvmm(object)->vmm;
+}
+
+static int
+nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_unmap_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ int ret = -ENOSYS;
+ u64 addr;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ addr = args->v0.addr;
+ } else
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ vma = nvkm_vmm_node_search(vmm, addr);
+ if (ret = -ENOENT, !vma || vma->addr != addr) {
+ VMM_DEBUG(vmm, "lookup %016llx: %016llx",
+ addr, vma ? vma->addr : ~0ULL);
+ goto done;
+ }
+
+ if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
+ VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
+ vma->user, !client->super, vma->busy);
+ goto done;
+ }
+
+ if (ret = -EINVAL, !vma->memory) {
+ VMM_DEBUG(vmm, "unmapped");
+ goto done;
+ }
+
+ nvkm_vmm_unmap_locked(vmm, vma);
+ ret = 0;
+done:
+ mutex_unlock(&vmm->mutex);
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_map_v0 v0;
+ } *args = argv;
+ u64 addr, size, handle, offset;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ struct nvkm_memory *memory;
+ int ret = -ENOSYS;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
+ addr = args->v0.addr;
+ size = args->v0.size;
+ handle = args->v0.memory;
+ offset = args->v0.offset;
+ } else
+ return ret;
+
+ if (IS_ERR((memory = nvkm_umem_search(client, handle)))) {
+ VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
+ return PTR_ERR(memory);
+ }
+
+ mutex_lock(&vmm->mutex);
+ if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) {
+ VMM_DEBUG(vmm, "lookup %016llx", addr);
+ goto fail;
+ }
+
+ if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
+ VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
+ vma->user, !client->super, vma->busy);
+ goto fail;
+ }
+
+ if (ret = -EINVAL, vma->addr != addr || vma->size != size) {
+ if (addr + size > vma->addr + vma->size || vma->memory ||
+ (vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) {
+ VMM_DEBUG(vmm, "split %d %d %d "
+ "%016llx %016llx %016llx %016llx",
+ !!vma->memory, vma->refd, vma->mapref,
+ addr, size, vma->addr, (u64)vma->size);
+ goto fail;
+ }
+
+ if (vma->addr != addr) {
+ const u64 tail = vma->size + vma->addr - addr;
+ if (ret = -ENOMEM, !(vma = nvkm_vma_tail(vma, tail)))
+ goto fail;
+ vma->part = true;
+ nvkm_vmm_node_insert(vmm, vma);
+ }
+
+ if (vma->size != size) {
+ const u64 tail = vma->size - size;
+ struct nvkm_vma *tmp;
+ if (ret = -ENOMEM, !(tmp = nvkm_vma_tail(vma, tail))) {
+ nvkm_vmm_unmap_region(vmm, vma);
+ goto fail;
+ }
+ tmp->part = true;
+ nvkm_vmm_node_insert(vmm, tmp);
+ }
+ }
+ vma->busy = true;
+ mutex_unlock(&vmm->mutex);
+
+ ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
+ if (ret == 0) {
+ /* Successful map will clear vma->busy. */
+ nvkm_memory_unref(&memory);
+ return 0;
+ }
+
+ mutex_lock(&vmm->mutex);
+ vma->busy = false;
+ nvkm_vmm_unmap_region(vmm, vma);
+fail:
+ mutex_unlock(&vmm->mutex);
+ nvkm_memory_unref(&memory);
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_put_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ int ret = -ENOSYS;
+ u64 addr;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ addr = args->v0.addr;
+ } else
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ vma = nvkm_vmm_node_search(vmm, args->v0.addr);
+ if (ret = -ENOENT, !vma || vma->addr != addr || vma->part) {
+ VMM_DEBUG(vmm, "lookup %016llx: %016llx %d", addr,
+ vma ? vma->addr : ~0ULL, vma ? vma->part : 0);
+ goto done;
+ }
+
+ if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
+ VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
+ vma->user, !client->super, vma->busy);
+ goto done;
+ }
+
+ nvkm_vmm_put_locked(vmm, vma);
+ ret = 0;
+done:
+ mutex_unlock(&vmm->mutex);
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_get_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ int ret = -ENOSYS;
+ bool getref, mapref, sparse;
+ u8 page, align;
+ u64 size;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ getref = args->v0.type == NVIF_VMM_GET_V0_PTES;
+ mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR;
+ sparse = args->v0.sparse;
+ page = args->v0.page;
+ align = args->v0.align;
+ size = args->v0.size;
+ } else
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse,
+ page, align, size, &vma);
+ mutex_unlock(&vmm->mutex);
+ if (ret)
+ return ret;
+
+ args->v0.addr = vma->addr;
+ vma->user = !client->super;
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ union {
+ struct nvif_vmm_page_v0 v0;
+ } *args = argv;
+ const struct nvkm_vmm_page *page;
+ int ret = -ENOSYS;
+ u8 type, index, nr;
+
+ page = uvmm->vmm->func->page;
+ for (nr = 0; page[nr].shift; nr++);
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ if ((index = args->v0.index) >= nr)
+ return -EINVAL;
+ type = page[index].type;
+ args->v0.shift = page[index].shift;
+ args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE);
+ args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM);
+ args->v0.host = !!(type & NVKM_VMM_PAGE_HOST);
+ args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP);
+ } else
+ return -ENOSYS;
+
+ return 0;
+}
+
+static int
+nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
+{
+ struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
+ switch (mthd) {
+ case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc);
+ case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc);
+ case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc);
+ case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc);
+ case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
+ default:
+ break;
+ }
+ return -EINVAL;
+}
+
+static void *
+nvkm_uvmm_dtor(struct nvkm_object *object)
+{
+ struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
+ nvkm_vmm_unref(&uvmm->vmm);
+ return uvmm;
+}
+
+static const struct nvkm_object_func
+nvkm_uvmm = {
+ .dtor = nvkm_uvmm_dtor,
+ .mthd = nvkm_uvmm_mthd,
+};
+
+int
+nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+ struct nvkm_object **pobject)
+{
+ struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
+ const bool more = oclass->base.maxver >= 0;
+ union {
+ struct nvif_vmm_v0 v0;
+ } *args = argv;
+ const struct nvkm_vmm_page *page;
+ struct nvkm_uvmm *uvmm;
+ int ret = -ENOSYS;
+ u64 addr, size;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
+ addr = args->v0.addr;
+ size = args->v0.size;
+ } else
+ return ret;
+
+ if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL)))
+ return -ENOMEM;
+ nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object);
+ *pobject = &uvmm->object;
+
+ if (!mmu->vmm) {
+ ret = mmu->func->vmm.ctor(mmu, addr, size, argv, argc,
+ NULL, "user", &uvmm->vmm);
+ if (ret)
+ return ret;
+
+ uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug);
+ } else {
+ if (size)
+ return -EINVAL;
+
+ uvmm->vmm = nvkm_vmm_ref(mmu->vmm);
+ }
+
+ page = uvmm->vmm->func->page;
+ args->v0.page_nr = 0;
+ while (page && (page++)->shift)
+ args->v0.page_nr++;
+ args->v0.addr = uvmm->vmm->start;
+ args->v0.size = uvmm->vmm->limit;
+ return 0;
+}
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.h
@@ -0,0 +1,14 @@
+#ifndef __NVKM_UVMM_H__
+#define __NVKM_UVMM_H__
+#define nvkm_uvmm(p) container_of((p), struct nvkm_uvmm, object)
+#include <core/object.h>
+#include "vmm.h"
+
+struct nvkm_uvmm {
+ struct nvkm_object object;
+ struct nvkm_vmm *vmm;
+};
+
+int nvkm_uvmm_new(const struct nvkm_oclass *, void *argv, u32 argc,
+ struct nvkm_object **);
+#endif