Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 404 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
new file mode 100644
index 000000000..524cd3c0e
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
@@ -0,0 +1,404 @@
+/*
+ * 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_vmm_ref(nvkm_uvmm(object)->vmm);
+}
+
+static int
+nvkm_uvmm_mthd_pfnclr(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+	union {
+		struct nvif_vmm_pfnclr_v0 v0;
+	} *args = argv;
+	struct nvkm_vmm *vmm = uvmm->vmm;
+	int ret = -ENOSYS;
+	u64 addr, size;
+
+	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+		addr = args->v0.addr;
+		size = args->v0.size;
+	} else
+		return ret;
+
+	if (size) {
+		mutex_lock(&vmm->mutex);
+		ret = nvkm_vmm_pfn_unmap(vmm, addr, size);
+		mutex_unlock(&vmm->mutex);
+	}
+
+	return ret;
+}
+
+static int
+nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+	union {
+		struct nvif_vmm_pfnmap_v0 v0;
+	} *args = argv;
+	struct nvkm_vmm *vmm = uvmm->vmm;
+	int ret = -ENOSYS;
+	u64 addr, size, *phys;
+	u8  page;
+
+	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
+		page = args->v0.page;
+		addr = args->v0.addr;
+		size = args->v0.size;
+		phys = args->v0.phys;
+		if (argc != (size >> page) * sizeof(args->v0.phys[0]))
+			return -EINVAL;
+	} else
+		return ret;
+
+	if (size) {
+		mutex_lock(&vmm->mutex);
+		ret = nvkm_vmm_pfn_map(vmm, page, addr, size, phys);
+		mutex_unlock(&vmm->mutex);
+	}
+
+	return ret;
+}
+
+static int
+nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+	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->busy) {
+		VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
+		goto done;
+	}
+
+	if (ret = -EINVAL, !vma->memory) {
+		VMM_DEBUG(vmm, "unmapped");
+		goto done;
+	}
+
+	nvkm_vmm_unmap_locked(vmm, vma, false);
+	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;
+
+	memory = nvkm_umem_search(client, handle);
+	if (IS_ERR(memory)) {
+		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->busy) {
+		VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
+		goto fail;
+	}
+
+	if (ret = -EINVAL, vma->mapped && !vma->memory) {
+		VMM_DEBUG(vmm, "pfnmap %016llx", addr);
+		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;
+		}
+
+		vma = nvkm_vmm_node_split(vmm, vma, addr, size);
+		if (!vma) {
+			ret = -ENOMEM;
+			goto fail;
+		}
+	}
+	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)
+{
+	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->busy) {
+		VMM_DEBUG(vmm, "denied %016llx: %d", addr, 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)
+{
+	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;
+	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 (!(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);
+	case NVIF_VMM_V0_PFNMAP: return nvkm_uvmm_mthd_pfnmap(uvmm, argv, argc);
+	case NVIF_VMM_V0_PFNCLR: return nvkm_uvmm_mthd_pfnclr(uvmm, argv, argc);
+	case NVIF_VMM_V0_MTHD(0x00) ... NVIF_VMM_V0_MTHD(0x7f):
+		if (uvmm->vmm->func->mthd) {
+			return uvmm->vmm->func->mthd(uvmm->vmm,
+						     uvmm->object.client,
+						     mthd, argv, argc);
+		}
+		break;
+	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;
+	bool managed;
+
+	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
+		managed = args->v0.managed != 0;
+		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, managed, 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;
+}