Merge tag 'drm-next-2026-06-17' of https://gitlab.freedesktop.org/drm/kernel

Pull drm updates from Dave Airlie:
 "Highlights:
   - xe: add initial CRI platform support
   - amdgpu: initial HDMI 2.1 FRL support
   - rust: add some new type concepts for device lifetimes
   - scheduler: moves to a fair algorithm and lots of cleanups

  But it's mostly the usual mountain of changes across the board.

  core:
   - add docbook for DRM_IOCTL_SYNCOBJ_EVENTFD
   - change signature of drm_connector_attach_hdr_output_metadata_property
   - dedup counter and timestamp retrieval in vblank code
   - parse AMD VSDB v3 in CTA extension blocks
   - add P230, Y7, XYYY2101010, T430, XVUY210101010 formats
   - don't call drop master on file close if not master
   - use drm_printf_indent in atomic / bridge
   - fix 32b format descriptions
   - docs: fix toctree
   - hdmi: add common TMDS character rates
   - fix drm_syncobj_find_fence leak

  rust:
   - introduce Higher-Ranked lifetime types
   - replace drvdata with scoped registration data
   - add GPUVM immediate mode abstraction for rust GPU drivers
   - introduce DeviceContext type state for drm::Device

  bridge:
   - clarify drm_bridge_get/put
   - create drm_get_bridge_by_endpoint and use it
   - analogix_dp: add panel probing
   - ite-it6211 - use drm audio hdmi helpers

  buddy:
   - add lockdep annotations

  dp:
   - add PR and VRR updates
   - mst: fix buffer overflows
   - add Adaptive Sync SDP decoding support
   - fix OOB reads in dp-mst

  ttm:
   - bump fpfn/lpfn to 64-bit

  scheduler:
   - change default to fair scheduler
   - map runqueue 1:1 with scheduler

  dma-buf:
   - port selftests to kunit
   - convert dma-buf system/heap allocators to module
   - add separate DMABUF_HEAPS_SYSTEM_CC_SHARED Kconfig

  udmabuf:
   - revert hugetlb support
   - fix error with CONFIG_DMA_API_DEBUG

  dma-fence:
   - fix tracepoints lifetime
   - remove unused signal on any support

  ras:
   - add clear error counter netlink command to drm ras

  gpusvm:
   - reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges
   - use IOVA allocations

  pagemap:
   - use IOVA allocations

  panels:
   - update to use ref counts
   - add support for CSW PNB601LS1-2, LGD LP116WHA-SPB1
   - add support for waveshare panels
   - CMN N116BCN-EA1, CMN N140HCA-EEK, IVO M140NWFQ R5,
   - IVO, R140NWFW R0, BOE NT140*, BOE NV133FHM-N4F,
   - AUO B140*, AUO B133HAN06.6 and AUO B116XTN02.3 eDP panels
   - Surface Pro 12 Panel

  xe:
   - add CRI PCI-IDs
   - debugfs add multi-lrc info
   - engine init cleanup
   - PF fair scheduling auto provisioning
   - system controller support for CRI/Xe3p
   - PXP state machine fixes
   - Reset/wedge/unload corner case fixes
   - Wedge path memory allocation fixes
   - PAT type cleanups
   - Reject unsafe PAT for CPU cached memory
   - OA improvements for CRI device memory
   - kernel doc syntax in xe headers
   - xe_drm.h documentation fixes
   - include guard cleanups
   - VF CCS memory pool
   - i915/xe step unification
   - Xe3p GT tuning fixes
   - forcewake cleanup in GT and GuC
   - admin-only PF mode
   - enable hwmon energy attributes for CRI
   - enable GT_MI_USER_INTERRUPT
   - refactor emit functions
   - oa workarounds
   - multi_queue: allow QUEUE_TIMESTAMP register
   - convert stolen memory to ttm range manager
   - use xe2 style blitter as a feature flag
   - make drm_driver const
   - add/use IRQ page to HW engine definition
   - fix oops when display disabled

  i915:
   - enable PIPEDMC_ERROR interrupt
   - more common display code refactoring
   - restructure DP/HDMI sink format handling
   - eliminate FB usage from lowlevel pinning code
   - panel replay bw optimization
   - integrate sharpness filter into the scaler
   - new fb_pin abstraction for xe/i915 fb transparent handling
   - skip inactive MST connectors on HDCP
   - start switching to display specific registers
   - use polling when irq unavailable
   - Adaptive-sync SDP prep

  amdgpu:
   - use drm_display_info for AMD VSDB data
   - Initial HDMI 2.1 FRL support
   - Initial DCN 4.2.1 support
   - GART fixes for non-4k pages
   - GC 11.5.6/SDMA 6.4.0/and other new IPs
   - GFX9/DCE6/Hawaii/SDMA4/GART/Userq fixes
   - Finish support for using multiple SDMA queues for TTM operations
   - SWSMU updates
   - GC 12.1 updates
   - SMU 15.0.8 updates
   - DCN 4.2 updates
   - DC type conversion fixes
   - Enable DC power module
   - Replay/PSR updates
   - SMU 13.x updates
   - Compute queue quantum MQD updates
   - ASPM fix
   - Align VKMS with common implementation
   - DC analog support fixes
   - UVD 3 fixes
   - TCC harvesting fixes for SI
   - GC 11 APU module reload fix
   - NBIO 6.3.2 support
   - IH 7.1 updates
   - DC cursor fixes
   - VCN/JPEG user fence fixes
   - DC support for connectors without DDC
   - Prefer ROM BAR for default VGA device
   - DC bandwidth fixes
   - Add PTL support for profiler
   - Introduce dc_plane_cm and migrate surface update color path
   - Add FRL registers for HDMI 2.1
   - Restructure VM state machine
   - Auxless ALPM support
   - GEM_OP locking/warning fixes
   - switch to system_dfl_wq

  amdkfd:
   - GPUVM TLB flush fix
   - Hotplug fix
   - Boundary check fixes
   - SVM fixes
   - CRIU fixes
   - add profiler API
   - MES 12.1 updates

  msm:
   - core:
     - fix shrinker documentation
     - IFPC enabled for gen8
     - PERFCNTR_CONFIG ioctl support
   - GPU:
     - reworked UBWC handling
     - a810 support
   - MDSS:
     - add support for Milos platform
     - reworked UBWC handling
   - DisplayPort:
     - reworked HPD handling as prep for MST
   - DPU:
     - Milos platform support
     - reworked UBWC handling
   - DSI:
     - Milos platform support

  nova:
   - Hopper/Blackwell enablement (GH100/GB100/GB202)
     - FSP support
     - 32-bit firmware support
     - HAL functions
   - refactor GSP boot/unload
   - GA100 support
   - VBIOS hardening/refactoring
   - Adopt higher order lifetime types

  tyr:
   - define register blocks
   - add shmem backed GEM objects
   - adopt higher order lifetime types
   - move clock cleanup into Drop

  radeon:
   - Hawaii SMU fixes
   - CS parser fix
   - use struct drm_edid instead of edid

  amdxdna:
   - export per-client BO memory via fdinfo
   - AIE4 device support
   - support medium/lower power modes
   - expandable device heap support
   - revert read-only user-pointer BO mappings

  ivpu:
   - support frequency limiting

  panthor:
   - enable GEM shrinker support
   - add eviction and reclaim info to fdinfo

  v3d:
   - enable runtime PM

  mgag200:
   - support XRGB1555 + C8

  ast:
   - support XRGB1555 + C8
   - use constants for lots of registers
   - fix register handling

  imagination:
   - fence handling refactoring

  nouveau:
   - fix sched double call
   - expose VBIOS on GSP-RM systems
   - add GA100 support

  virtio:
   - add VIRTIO_GPU_F_BLOB_ALIGNMENT flag
   - add deferred mapping support

  gud:
   - add RCade Display Adapter

  hibmc:
   - fix no connectors usage

  mediatek:
   - hdmi: convert error handling
   - simplify mtk_crtc allocation

  exynos:
   - move fbdev emulation to drm client buffers
   - use drm format helpers for geometry/size
   - adopt core DMA tracking
   - fix framebuffer offset handling

  renesas:
   - add RZ/T2H SOC support

  versilicon:
   - add cursor plane support

  tegra:
   - use drm client for framebuffer"

* tag 'drm-next-2026-06-17' of https://gitlab.freedesktop.org/drm/kernel: (1731 commits)
  dma-buf: move system_cc_shared heap under separate Kconfig
  accel/amdxdna: Clear sva pointer after unbind
  agp/amd64: Fix broken error propagation in agp_amd64_probe()
  accel/amdxdna: Require carveout when PASID and force_iova are disabled
  drm/amdkfd: always resume_all after suspend_all
  drm/amdgpu/gfx: move fault and EOP IRQ get/put to hw_init/hw_fini
  drm/amd/display: Consult MCCS FreeSync cap only if requested & supported
  drm/amd/pm: Use strscpy in profile mode parsing
  drm/amdkfd: Fix infinite loop parsing CRAT with zero subtype length
  drm/amdkfd: fix sysfs topology prop length on buffer truncation
  drm/amdgpu: drop retry loop in amdgpu_hmm_range_get_pages
  drm/amd/pm: bound OD parameter parsing to stack array size
  drm/amd/pm: Stop pp_od_clk_voltage emit at PAGE_SIZE
  drm/amdkfd: Unwind debug trap enable on copy_to_user failure
  drm/amdgpu: validate the mes firmware version for gfx12.1
  drm/amdgpu: validate the mes firmware version for gfx12
  drm/amdgpu: compare MES firmware version ucode for gfx11
  drm/amdkfd: Add bounds check for AMDKFD_IOC_WAIT_EVENTS
  drm/amdgpu: restart the CS if some parts of the VM are still invalidated
  drm/amd/display: use unsigned types for local pipe and REG_GET counters
  ...

9 files changed, 1501 insertions, 112 deletions

diff --git a/rust/kernel/drm/device.rs b/rust/kernel/drm/device.rs
index 403fc35353c7..477cf771fb10 100644
--- a/rust/kernel/drm/device.rs
+++ b/rust/kernel/drm/device.rs
@@ -6,10 +6,12 @@
 
 use crate::{
     alloc::allocator::Kmalloc,
-    bindings, device,
+    bindings,
+    device,
     drm::{
         self,
-        driver::AllocImpl, //
+        driver::AllocImpl,
+        private::Sealed, //
     },
     error::from_err_ptr,
     prelude::*,
@@ -17,16 +19,20 @@ use crate::{
         ARef,
         AlwaysRefCounted, //
     },
-    types::Opaque,
+    types::{
+        NotThreadSafe,
+        Opaque, //
+    },
     workqueue::{
         HasDelayedWork,
         HasWork,
         Work,
         WorkItem, //
-    },
+    }, //
 };
 use core::{
     alloc::Layout,
+    marker::PhantomData,
     mem,
     ops::Deref,
     ptr::{
@@ -66,36 +72,122 @@ macro_rules! drm_legacy_fields {
     }
 }
 
-/// A typed DRM device with a specific `drm::Driver` implementation.
+/// A trait implemented by all possible contexts a [`Device`] can be used in.
+///
+/// Setting up a new [`Device`] is a multi-stage process. Each step of the process that a user
+/// interacts with in Rust has a respective [`DeviceContext`] typestate. For example,
+/// `Device<T, Registered>` would be a [`Device`] that reached the [`Registered`] [`DeviceContext`].
+///
+/// Each stage of this process is described below:
+///
+/// ```text
+///        1                     2                         3
+/// +--------------+   +------------------+   +-----------------------+
+/// |Device created| → |Device initialized| → |Registered w/ userspace|
+/// +--------------+   +------------------+   +-----------------------+
+///    (Uninit)                                      (Registered)
+/// ```
+///
+/// 1. The [`Device`] is in the [`Uninit`] context and is not guaranteed to be initialized or
+///    registered with userspace. Only a limited subset of DRM core functionality is available.
+/// 2. The [`Device`] is guaranteed to be fully initialized, but is not guaranteed to be registered
+///    with userspace. All DRM core functionality which doesn't interact with userspace is
+///    available. We currently don't have a context for representing this.
+/// 3. The [`Device`] is guaranteed to be fully initialized, and is guaranteed to have been
+///    registered with userspace at some point - thus putting it in the [`Registered`] context.
+///
+/// An important caveat of [`DeviceContext`] which must be kept in mind: when used as a typestate
+/// for a reference type, it can only guarantee that a [`Device`] reached a particular stage in the
+/// initialization process _at the time the reference was taken_. No guarantee is made in regards to
+/// what stage of the process the [`Device`] is currently in. This means for instance that a
+/// `&Device<T, Uninit>` may actually be registered with userspace, it just wasn't known to be
+/// registered at the time the reference was taken.
+pub trait DeviceContext: Sealed + Send + Sync {}
+
+/// The [`DeviceContext`] of a [`Device`] that was registered with userspace at some point.
 ///
-/// The device is always reference-counted.
+/// This represents a [`Device`] which is guaranteed to have been registered with userspace at
+/// some point in time. Such a DRM device is guaranteed to have been fully-initialized.
+///
+/// Note: A device in this context is not guaranteed to remain registered with userspace for its
+/// entire lifetime, as this is impossible to guarantee at compile-time.
 ///
 /// # Invariants
 ///
-/// `self.dev` is a valid instance of a `struct device`.
-#[repr(C)]
-pub struct Device<T: drm::Driver> {
-    dev: Opaque<bindings::drm_device>,
-    data: T::Data,
+/// A [`Device`] in this [`DeviceContext`] is guaranteed to have been registered with userspace
+/// at some point in time.
+pub struct Registered;
+
+impl Sealed for Registered {}
+impl DeviceContext for Registered {}
+
+/// The [`DeviceContext`] of a [`Device`] that may be unregistered and partly uninitialized.
+///
+/// A [`Device`] in this context is only guaranteed to be partly initialized, and may or may not
+/// be registered with userspace. Thus operations which depend on the [`Device`] being fully
+/// initialized, or which depend on the [`Device`] being registered with userspace are not
+/// available through this [`DeviceContext`].
+///
+/// A [`Device`] in this context can be used to create a
+/// [`Registration`](drm::driver::Registration).
+pub struct Uninit;
+
+impl Sealed for Uninit {}
+impl DeviceContext for Uninit {}
+
+/// A [`Device`] which is known at compile-time to be unregistered with userspace.
+///
+/// This type allows performing operations which are only safe to do before userspace registration,
+/// and can be used to create a [`Registration`](drm::driver::Registration) once the driver is ready
+/// to register the device with userspace.
+///
+/// Since DRM device initialization must be single-threaded, this object is not thread-safe.
+///
+/// # Invariants
+///
+/// The device in `self.0` is guaranteed to be a newly created [`Device`] that has not yet been
+/// registered with userspace until this type is dropped.
+pub struct UnregisteredDevice<T: drm::Driver>(ARef<Device<T, Uninit>>, NotThreadSafe);
+
+impl<T: drm::Driver> Deref for UnregisteredDevice<T> {
+    type Target = Device<T, Uninit>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
 }
 
-impl<T: drm::Driver> Device<T> {
+impl<T: drm::Driver> UnregisteredDevice<T> {
+    const fn compute_features() -> u32 {
+        let mut features = drm::driver::FEAT_GEM;
+
+        if T::FEAT_RENDER {
+            features |= drm::driver::FEAT_RENDER;
+        }
+
+        features
+    }
+
     const VTABLE: bindings::drm_driver = drm_legacy_fields! {
         load: None,
         open: Some(drm::File::<T::File>::open_callback),
         postclose: Some(drm::File::<T::File>::postclose_callback),
         unload: None,
-        release: Some(Self::release),
+        release: Some(Device::<T>::release),
         master_set: None,
         master_drop: None,
         debugfs_init: None,
-        gem_create_object: T::Object::ALLOC_OPS.gem_create_object,
-        prime_handle_to_fd: T::Object::ALLOC_OPS.prime_handle_to_fd,
-        prime_fd_to_handle: T::Object::ALLOC_OPS.prime_fd_to_handle,
-        gem_prime_import: T::Object::ALLOC_OPS.gem_prime_import,
-        gem_prime_import_sg_table: T::Object::ALLOC_OPS.gem_prime_import_sg_table,
-        dumb_create: T::Object::ALLOC_OPS.dumb_create,
-        dumb_map_offset: T::Object::ALLOC_OPS.dumb_map_offset,
+
+        // Ignore the Uninit DeviceContext below. It is only provided because it is required by the
+        // compiler, and it is not actually used by these functions.
+        gem_create_object: T::Object::<Uninit>::ALLOC_OPS.gem_create_object,
+        prime_handle_to_fd: T::Object::<Uninit>::ALLOC_OPS.prime_handle_to_fd,
+        prime_fd_to_handle: T::Object::<Uninit>::ALLOC_OPS.prime_fd_to_handle,
+        gem_prime_import: T::Object::<Uninit>::ALLOC_OPS.gem_prime_import,
+        gem_prime_import_sg_table: T::Object::<Uninit>::ALLOC_OPS.gem_prime_import_sg_table,
+        dumb_create: T::Object::<Uninit>::ALLOC_OPS.dumb_create,
+        dumb_map_offset: T::Object::<Uninit>::ALLOC_OPS.dumb_map_offset,
+
         show_fdinfo: None,
         fbdev_probe: None,
 
@@ -105,7 +197,7 @@ impl<T: drm::Driver> Device<T> {
         name: crate::str::as_char_ptr_in_const_context(T::INFO.name).cast_mut(),
         desc: crate::str::as_char_ptr_in_const_context(T::INFO.desc).cast_mut(),
 
-        driver_features: drm::driver::FEAT_GEM,
+        driver_features: Self::compute_features(),
         ioctls: T::IOCTLS.as_ptr(),
         num_ioctls: T::IOCTLS.len() as i32,
         fops: &Self::GEM_FOPS,
@@ -113,11 +205,13 @@ impl<T: drm::Driver> Device<T> {
 
     const GEM_FOPS: bindings::file_operations = drm::gem::create_fops();
 
-    /// Create a new `drm::Device` for a `drm::Driver`.
-    pub fn new(dev: &device::Device, data: impl PinInit<T::Data, Error>) -> Result<ARef<Self>> {
+    /// Create a new `UnregisteredDevice` for a `drm::Driver`.
+    ///
+    /// This can be used to create a [`Registration`](kernel::drm::Registration).
+    pub fn new(dev: &device::Device, data: impl PinInit<T::Data, Error>) -> Result<Self> {
         // `__drm_dev_alloc` uses `kmalloc()` to allocate memory, hence ensure a `kmalloc()`
         // compatible `Layout`.
-        let layout = Kmalloc::aligned_layout(Layout::new::<Self>());
+        let layout = Kmalloc::aligned_layout(Layout::new::<Device<T, Uninit>>());
 
         // Use a temporary vtable without a `release` callback until `data` is initialized, so
         // init failure can release the DRM device without dropping uninitialized fields.
@@ -129,12 +223,12 @@ impl<T: drm::Driver> Device<T> {
         // SAFETY:
         // - `alloc_vtable` reference remains valid until no longer used,
         // - `dev` is valid by its type invarants,
-        let raw_drm: *mut Self = unsafe {
+        let raw_drm: *mut Device<T, Uninit> = unsafe {
             bindings::__drm_dev_alloc(
                 dev.as_raw(),
                 &alloc_vtable,
                 layout.size(),
-                mem::offset_of!(Self, dev),
+                mem::offset_of!(Device<T, Uninit>, dev),
             )
         }
         .cast();
@@ -142,7 +236,7 @@ impl<T: drm::Driver> Device<T> {
 
         // SAFETY: `raw_drm` is a valid pointer to `Self`, given that `__drm_dev_alloc` was
         // successful.
-        let drm_dev = unsafe { Self::into_drm_device(raw_drm) };
+        let drm_dev = unsafe { Device::into_drm_device(raw_drm) };
 
         // SAFETY: `raw_drm` is a valid pointer to `Self`.
         let raw_data = unsafe { ptr::addr_of_mut!((*raw_drm.as_ptr()).data) };
@@ -161,9 +255,39 @@ impl<T: drm::Driver> Device<T> {
 
         // SAFETY: The reference count is one, and now we take ownership of that reference as a
         // `drm::Device`.
-        Ok(unsafe { ARef::from_raw(raw_drm) })
+        // INVARIANT: We just created the device above, but have yet to call `drm_dev_register`.
+        // `Self` cannot be copied or sent to another thread - ensuring that `drm_dev_register`
+        // won't be called during its lifetime and that the device is unregistered.
+        Ok(Self(unsafe { ARef::from_raw(raw_drm) }, NotThreadSafe))
     }
+}
 
+/// A typed DRM device with a specific [`drm::Driver`] implementation and [`DeviceContext`].
+///
+/// Since DRM devices can be used before being fully initialized and registered with userspace, `C`
+/// represents the furthest [`DeviceContext`] we can guarantee that this [`Device`] has reached.
+///
+/// Keep in mind: this means that an unregistered device can still have the registration state
+/// [`Registered`] as long as it was registered with userspace once in the past, and that the
+/// behavior of such a device is still well-defined. Additionally, a device with the registration
+/// state [`Uninit`] simply does not have a guaranteed registration state at compile time, and could
+/// be either registered or unregistered. Since there is no way to guarantee a long-lived reference
+/// to an unregistered device would remain unregistered, we do not provide a [`DeviceContext`] for
+/// this.
+///
+/// # Invariants
+///
+/// * `self.dev` is a valid instance of a `struct device`.
+/// * The data layout of `Self` remains the same across all implementations of `C`.
+/// * Any invariants for `C` also apply.
+#[repr(C)]
+pub struct Device<T: drm::Driver, C: DeviceContext = Registered> {
+    dev: Opaque<bindings::drm_device>,
+    data: T::Data,
+    _ctx: PhantomData<C>,
+}
+
+impl<T: drm::Driver, C: DeviceContext> Device<T, C> {
     pub(crate) fn as_raw(&self) -> *mut bindings::drm_device {
         self.dev.get()
     }
@@ -189,13 +313,13 @@ impl<T: drm::Driver> Device<T> {
     ///
     /// # Safety
     ///
-    /// Callers must ensure that `ptr` is valid, non-null, and has a non-zero reference count,
-    /// i.e. it must be ensured that the reference count of the C `struct drm_device` `ptr` points
-    /// to can't drop to zero, for the duration of this function call and the entire duration when
-    /// the returned reference exists.
-    ///
-    /// Additionally, callers must ensure that the `struct device`, `ptr` is pointing to, is
-    /// embedded in `Self`.
+    /// * Callers must ensure that `ptr` is valid, non-null, and has a non-zero reference count,
+    ///   i.e. it must be ensured that the reference count of the C `struct drm_device` `ptr` points
+    ///   to can't drop to zero, for the duration of this function call and the entire duration when
+    ///   the returned reference exists.
+    /// * Additionally, callers must ensure that the `struct device`, `ptr` is pointing to, is
+    ///   embedded in `Self`.
+    /// * Callers promise that any type invariants of `C` will be upheld.
     #[doc(hidden)]
     pub unsafe fn from_raw<'a>(ptr: *const bindings::drm_device) -> &'a Self {
         // SAFETY: By the safety requirements of this function `ptr` is a valid pointer to a
@@ -215,9 +339,20 @@ impl<T: drm::Driver> Device<T> {
         // - `this` is valid for dropping.
         unsafe { core::ptr::drop_in_place(this) };
     }
+
+    /// Change the [`DeviceContext`] for a [`Device`].
+    ///
+    /// # Safety
+    ///
+    /// The caller promises that `self` fulfills all of the guarantees provided by the given
+    /// [`DeviceContext`].
+    pub(crate) unsafe fn assume_ctx<NewCtx: DeviceContext>(&self) -> &Device<T, NewCtx> {
+        // SAFETY: The data layout is identical via our type invariants.
+        unsafe { mem::transmute(self) }
+    }
 }
 
-impl<T: drm::Driver> Deref for Device<T> {
+impl<T: drm::Driver, C: DeviceContext> Deref for Device<T, C> {
     type Target = T::Data;
 
     fn deref(&self) -> &Self::Target {
@@ -227,7 +362,7 @@ impl<T: drm::Driver> Deref for Device<T> {
 
 // SAFETY: DRM device objects are always reference counted and the get/put functions
 // satisfy the requirements.
-unsafe impl<T: drm::Driver> AlwaysRefCounted for Device<T> {
+unsafe impl<T: drm::Driver, C: DeviceContext> AlwaysRefCounted for Device<T, C> {
     fn inc_ref(&self) {
         // SAFETY: The existence of a shared reference guarantees that the refcount is non-zero.
         unsafe { bindings::drm_dev_get(self.as_raw()) };
@@ -242,7 +377,7 @@ unsafe impl<T: drm::Driver> AlwaysRefCounted for Device<T> {
     }
 }
 
-impl<T: drm::Driver> AsRef<device::Device> for Device<T> {
+impl<T: drm::Driver, C: DeviceContext> AsRef<device::Device> for Device<T, C> {
     fn as_ref(&self) -> &device::Device {
         // SAFETY: `bindings::drm_device::dev` is valid as long as the DRM device itself is valid,
         // which is guaranteed by the type invariant.
@@ -251,21 +386,22 @@ impl<T: drm::Driver> AsRef<device::Device> for Device<T> {
 }
 
 // SAFETY: A `drm::Device` can be released from any thread.
-unsafe impl<T: drm::Driver> Send for Device<T> {}
+unsafe impl<T: drm::Driver, C: DeviceContext> Send for Device<T, C> {}
 
 // SAFETY: A `drm::Device` can be shared among threads because all immutable methods are protected
 // by the synchronization in `struct drm_device`.
-unsafe impl<T: drm::Driver> Sync for Device<T> {}
+unsafe impl<T: drm::Driver, C: DeviceContext> Sync for Device<T, C> {}
 
-impl<T, const ID: u64> WorkItem<ID> for Device<T>
+impl<T, C, const ID: u64> WorkItem<ID> for Device<T, C>
 where
     T: drm::Driver,
-    T::Data: WorkItem<ID, Pointer = ARef<Device<T>>>,
-    T::Data: HasWork<Device<T>, ID>,
+    T::Data: WorkItem<ID, Pointer = ARef<Self>>,
+    T::Data: HasWork<Self, ID>,
+    C: DeviceContext,
 {
-    type Pointer = ARef<Device<T>>;
+    type Pointer = ARef<Self>;
 
-    fn run(ptr: ARef<Device<T>>) {
+    fn run(ptr: ARef<Self>) {
         T::Data::run(ptr);
     }
 }
@@ -277,40 +413,42 @@ where
 // stored inline in `drm::Device`, so the `container_of` call is valid.
 //
 // - The two methods are true inverses of each other: given `ptr: *mut
-// Device<T>`, `raw_get_work` will return a `*mut Work<Device<T>, ID>` through
-// `T::Data::raw_get_work` and given a `ptr: *mut Work<Device<T>, ID>`,
-// `work_container_of` will return a `*mut Device<T>` through `container_of`.
-unsafe impl<T, const ID: u64> HasWork<Device<T>, ID> for Device<T>
+// Device<T, C>`, `raw_get_work` will return a `*mut Work<Device<T, C>, ID>` through
+// `T::Data::raw_get_work` and given a `ptr: *mut Work<Device<T, C>, ID>`,
+// `work_container_of` will return a `*mut Device<T, C>` through `container_of`.
+unsafe impl<T, C, const ID: u64> HasWork<Self, ID> for Device<T, C>
 where
     T: drm::Driver,
-    T::Data: HasWork<Device<T>, ID>,
+    T::Data: HasWork<Self, ID>,
+    C: DeviceContext,
 {
-    unsafe fn raw_get_work(ptr: *mut Self) -> *mut Work<Device<T>, ID> {
-        // SAFETY: The caller promises that `ptr` points to a valid `Device<T>`.
+    unsafe fn raw_get_work(ptr: *mut Self) -> *mut Work<Self, ID> {
+        // SAFETY: The caller promises that `ptr` points to a valid `Device<T, C>`.
         let data_ptr = unsafe { &raw mut (*ptr).data };
 
         // SAFETY: `data_ptr` is a valid pointer to `T::Data`.
         unsafe { T::Data::raw_get_work(data_ptr) }
     }
 
-    unsafe fn work_container_of(ptr: *mut Work<Device<T>, ID>) -> *mut Self {
+    unsafe fn work_container_of(ptr: *mut Work<Self, ID>) -> *mut Self {
         // SAFETY: The caller promises that `ptr` points at a `Work` field in
         // `T::Data`.
         let data_ptr = unsafe { T::Data::work_container_of(ptr) };
 
-        // SAFETY: `T::Data` is stored as the `data` field in `Device<T>`.
+        // SAFETY: `T::Data` is stored as the `data` field in `Device<T, C>`.
         unsafe { crate::container_of!(data_ptr, Self, data) }
     }
 }
 
 // SAFETY: Our `HasWork<T, ID>` implementation returns a `work_struct` that is
 // stored in the `work` field of a `delayed_work` with the same access rules as
-// the `work_struct` owing to the bound on `T::Data: HasDelayedWork<Device<T>,
+// the `work_struct` owing to the bound on `T::Data: HasDelayedWork<Device<T, C>,
 // ID>`, which requires that `T::Data::raw_get_work` return a `work_struct` that
 // is inside a `delayed_work`.
-unsafe impl<T, const ID: u64> HasDelayedWork<Device<T>, ID> for Device<T>
+unsafe impl<T, C, const ID: u64> HasDelayedWork<Self, ID> for Device<T, C>
 where
     T: drm::Driver,
-    T::Data: HasDelayedWork<Device<T>, ID>,
+    T::Data: HasDelayedWork<Self, ID>,
+    C: DeviceContext,
 {
 }
diff --git a/rust/kernel/drm/driver.rs b/rust/kernel/drm/driver.rs
index 5233bdebc9fc..25f7e233884d 100644
--- a/rust/kernel/drm/driver.rs
+++ b/rust/kernel/drm/driver.rs
@@ -13,9 +13,15 @@ use crate::{
     prelude::*,
     sync::aref::ARef, //
 };
+use core::{
+    mem,
+    ptr::NonNull, //
+};
 
 /// Driver use the GEM memory manager. This should be set for all modern drivers.
 pub(crate) const FEAT_GEM: u32 = bindings::drm_driver_feature_DRIVER_GEM;
+/// Driver supports render nodes, i.e.: /dev/dri/renderDXX devices.
+pub(crate) const FEAT_RENDER: u32 = bindings::drm_driver_feature_DRIVER_RENDER;
 
 /// Information data for a DRM Driver.
 pub struct DriverInfo {
@@ -105,7 +111,7 @@ pub trait Driver {
     type Data: Sync + Send;
 
     /// The type used to manage memory for this driver.
-    type Object: AllocImpl;
+    type Object<Ctx: drm::DeviceContext>: AllocImpl;
 
     /// The type used to represent a DRM File (client)
     type File: drm::file::DriverFile;
@@ -115,6 +121,16 @@ pub trait Driver {
 
     /// IOCTL list. See `kernel::drm::ioctl::declare_drm_ioctls!{}`.
     const IOCTLS: &'static [drm::ioctl::DrmIoctlDescriptor];
+
+    /// Sets the `DRIVER_RENDER` feature for this driver.
+    ///
+    /// When enabled, the driver exposes `/dev/dri/renderDXX` render nodes to
+    /// userspace. The render node is an alternate low-priviledge way to access
+    /// the driver, which is enforced on a per-ioctl level. Userspace processes
+    /// that open the render node can only invoke ioctls explicitly listed as
+    /// usable from the render node (i.e. marked DRM_RENDER_ALLOW), whereas
+    /// userspace processes using the master node can invoke any ioctl.
+    const FEAT_RENDER: bool = false;
 }
 
 /// The registration type of a `drm::Device`.
@@ -123,21 +139,31 @@ pub trait Driver {
 pub struct Registration<T: Driver>(ARef<drm::Device<T>>);
 
 impl<T: Driver> Registration<T> {
-    fn new(drm: &drm::Device<T>, flags: usize) -> Result<Self> {
+    fn new(drm: drm::UnregisteredDevice<T>, flags: usize) -> Result<Self> {
         // SAFETY: `drm.as_raw()` is valid by the invariants of `drm::Device`.
         to_result(unsafe { bindings::drm_dev_register(drm.as_raw(), flags) })?;
 
-        Ok(Self(drm.into()))
+        // SAFETY: We just called `drm_dev_register` above
+        let new = NonNull::from(unsafe { drm.assume_ctx() });
+
+        // Leak the ARef from UnregisteredDevice in preparation for transferring its ownership.
+        mem::forget(drm);
+
+        // SAFETY: `drm`'s `Drop` constructor was never called, ensuring that there remains at least
+        // one reference to the device - which we take ownership over here.
+        let new = unsafe { ARef::from_raw(new) };
+
+        Ok(Self(new))
     }
 
-    /// Registers a new [`Device`](drm::Device) with userspace.
+    /// Registers a new [`UnregisteredDevice`](drm::UnregisteredDevice) with userspace.
     ///
     /// Ownership of the [`Registration`] object is passed to [`devres::register`].
-    pub fn new_foreign_owned(
-        drm: &drm::Device<T>,
-        dev: &device::Device<device::Bound>,
+    pub fn new_foreign_owned<'a>(
+        drm: drm::UnregisteredDevice<T>,
+        dev: &'a device::Device<device::Bound>,
         flags: usize,
-    ) -> Result
+    ) -> Result<&'a drm::Device<T>>
     where
         T: 'static,
     {
@@ -146,8 +172,13 @@ impl<T: Driver> Registration<T> {
         }
 
         let reg = Registration::<T>::new(drm, flags)?;
+        let drm = NonNull::from(reg.device());
+
+        devres::register(dev, reg, GFP_KERNEL)?;
 
-        devres::register(dev, reg, GFP_KERNEL)
+        // SAFETY: Since `reg` was passed to devres::register(), the device now owns the lifetime
+        // of the DRM registration - ensuring that this references lives for at least as long as 'a.
+        Ok(unsafe { drm.as_ref() })
     }
 
     /// Returns a reference to the `Device` instance for this registration.
diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
index 01b5bd47a333..c8b66d816871 100644
--- a/rust/kernel/drm/gem/mod.rs
+++ b/rust/kernel/drm/gem/mod.rs
@@ -8,6 +8,10 @@ use crate::{
     bindings,
     drm::{
         self,
+        device::{
+            DeviceContext,
+            Registered, //
+        },
         driver::{
             AllocImpl,
             AllocOps, //
@@ -22,6 +26,7 @@ use crate::{
     types::Opaque,
 };
 use core::{
+    marker::PhantomData,
     ops::Deref,
     ptr::NonNull, //
 };
@@ -73,6 +78,12 @@ pub(crate) use impl_aref_for_gem_obj;
 /// [`DriverFile`]: drm::file::DriverFile
 pub type DriverFile<T> = drm::File<<<T as DriverObject>::Driver as drm::Driver>::File>;
 
+/// A type alias for retrieving the current [`AllocImpl`] for a given [`DriverObject`].
+///
+/// [`Driver`]: drm::Driver
+pub type DriverAllocImpl<T, Ctx = Registered> =
+    <<T as DriverObject>::Driver as drm::Driver>::Object<Ctx>;
+
 /// GEM object functions, which must be implemented by drivers.
 pub trait DriverObject: Sync + Send + Sized {
     /// Parent `Driver` for this object.
@@ -82,19 +93,19 @@ pub trait DriverObject: Sync + Send + Sized {
     type Args;
 
     /// Create a new driver data object for a GEM object of a given size.
-    fn new(
-        dev: &drm::Device<Self::Driver>,
+    fn new<Ctx: DeviceContext>(
+        dev: &drm::Device<Self::Driver, Ctx>,
         size: usize,
         args: Self::Args,
     ) -> impl PinInit<Self, Error>;
 
     /// Open a new handle to an existing object, associated with a File.
-    fn open(_obj: &<Self::Driver as drm::Driver>::Object, _file: &DriverFile<Self>) -> Result {
+    fn open(_obj: &DriverAllocImpl<Self>, _file: &DriverFile<Self>) -> Result {
         Ok(())
     }
 
     /// Close a handle to an existing object, associated with a File.
-    fn close(_obj: &<Self::Driver as drm::Driver>::Object, _file: &DriverFile<Self>) {}
+    fn close(_obj: &DriverAllocImpl<Self>, _file: &DriverFile<Self>) {}
 }
 
 /// Trait that represents a GEM object subtype
@@ -120,9 +131,12 @@ extern "C" fn open_callback<T: DriverObject>(
     // SAFETY: `open_callback` is only ever called with a valid pointer to a `struct drm_file`.
     let file = unsafe { DriverFile::<T>::from_raw(raw_file) };
 
-    // SAFETY: `open_callback` is specified in the AllocOps structure for `DriverObject<T>`,
-    // ensuring that `raw_obj` is contained within a `DriverObject<T>`
-    let obj = unsafe { <<T::Driver as drm::Driver>::Object as IntoGEMObject>::from_raw(raw_obj) };
+    // SAFETY:
+    // * `open_callback` is specified in the AllocOps structure for `DriverObject`, ensuring that
+    //   `raw_obj` is contained within a `DriverAllocImpl<T>`
+    // * It is only possible for `open_callback` to be called after device registration, ensuring
+    //   that the object's device is in the `Registered` state.
+    let obj: &DriverAllocImpl<T> = unsafe { IntoGEMObject::from_raw(raw_obj) };
 
     match T::open(obj, file) {
         Err(e) => e.to_errno(),
@@ -139,12 +153,12 @@ extern "C" fn close_callback<T: DriverObject>(
 
     // SAFETY: `close_callback` is specified in the AllocOps structure for `Object<T>`, ensuring
     // that `raw_obj` is indeed contained within a `Object<T>`.
-    let obj = unsafe { <<T::Driver as drm::Driver>::Object as IntoGEMObject>::from_raw(raw_obj) };
+    let obj: &DriverAllocImpl<T> = unsafe { IntoGEMObject::from_raw(raw_obj) };
 
     T::close(obj, file);
 }
 
-impl<T: DriverObject> IntoGEMObject for Object<T> {
+impl<T: DriverObject, Ctx: DeviceContext> IntoGEMObject for Object<T, Ctx> {
     fn as_raw(&self) -> *mut bindings::drm_gem_object {
         self.obj.get()
     }
@@ -152,7 +166,7 @@ impl<T: DriverObject> IntoGEMObject for Object<T> {
     unsafe fn from_raw<'a>(self_ptr: *mut bindings::drm_gem_object) -> &'a Self {
         // SAFETY: `obj` is guaranteed to be in an `Object<T>` via the safety contract of this
         // function
-        unsafe { &*crate::container_of!(Opaque::cast_from(self_ptr), Object<T>, obj) }
+        unsafe { &*crate::container_of!(Opaque::cast_from(self_ptr), Object<T, Ctx>, obj) }
     }
 }
 
@@ -169,7 +183,7 @@ pub trait BaseObject: IntoGEMObject {
     fn create_handle<D, F>(&self, file: &drm::File<F>) -> Result<u32>
     where
         Self: AllocImpl<Driver = D>,
-        D: drm::Driver<Object = Self, File = F>,
+        D: drm::Driver<Object<Registered> = Self, File = F>,
         F: drm::file::DriverFile<Driver = D>,
     {
         let mut handle: u32 = 0;
@@ -184,7 +198,7 @@ pub trait BaseObject: IntoGEMObject {
     fn lookup_handle<D, F>(file: &drm::File<F>, handle: u32) -> Result<ARef<Self>>
     where
         Self: AllocImpl<Driver = D>,
-        D: drm::Driver<Object = Self, File = F>,
+        D: drm::Driver<Object<Registered> = Self, File = F>,
         F: drm::file::DriverFile<Driver = D>,
     {
         // SAFETY: The arguments are all valid per the type invariants.
@@ -236,16 +250,18 @@ impl<T: IntoGEMObject> BaseObjectPrivate for T {}
 ///
 /// # Invariants
 ///
-/// - `self.obj` is a valid instance of a `struct drm_gem_object`.
+/// * `self.obj` is a valid instance of a `struct drm_gem_object`.
+/// * Any type invariants of `Ctx` apply to the parent DRM device for this GEM object.
 #[repr(C)]
 #[pin_data]
-pub struct Object<T: DriverObject + Send + Sync> {
+pub struct Object<T: DriverObject + Send + Sync, Ctx: DeviceContext = Registered> {
     obj: Opaque<bindings::drm_gem_object>,
     #[pin]
     data: T,
+    _ctx: PhantomData<Ctx>,
 }
 
-impl<T: DriverObject> Object<T> {
+impl<T: DriverObject, Ctx: DeviceContext> Object<T, Ctx> {
     const OBJECT_FUNCS: bindings::drm_gem_object_funcs = bindings::drm_gem_object_funcs {
         free: Some(Self::free_callback),
         open: Some(open_callback::<T>),
@@ -265,11 +281,16 @@ impl<T: DriverObject> Object<T> {
     };
 
     /// Create a new GEM object.
-    pub fn new(dev: &drm::Device<T::Driver>, size: usize, args: T::Args) -> Result<ARef<Self>> {
+    pub fn new(
+        dev: &drm::Device<T::Driver, Ctx>,
+        size: usize,
+        args: T::Args,
+    ) -> Result<ARef<Self>> {
         let obj: Pin<KBox<Self>> = KBox::pin_init(
             try_pin_init!(Self {
                 obj: Opaque::new(bindings::drm_gem_object::default()),
                 data <- T::new(dev, size, args),
+                _ctx: PhantomData,
             }),
             GFP_KERNEL,
         )?;
@@ -277,6 +298,8 @@ impl<T: DriverObject> Object<T> {
         // SAFETY: `obj.as_raw()` is guaranteed to be valid by the initialization above.
         unsafe { (*obj.as_raw()).funcs = &Self::OBJECT_FUNCS };
 
+        // INVARIANT: `dev` and the GEM object are in the same state at the moment, and upgrading
+        // the typestate in `dev` will not carry over to the GEM object.
         if let Err(err) =
             // SAFETY: The arguments are all valid per the type invariants.
             to_result(unsafe {
@@ -300,13 +323,15 @@ impl<T: DriverObject> Object<T> {
     }
 
     /// Returns the `Device` that owns this GEM object.
-    pub fn dev(&self) -> &drm::Device<T::Driver> {
+    pub fn dev(&self) -> &drm::Device<T::Driver, Ctx> {
         // SAFETY:
         // - `struct drm_gem_object.dev` is initialized and valid for as long as the GEM
         //   object lives.
         // - The device we used for creating the gem object is passed as &drm::Device<T::Driver> to
         //   Object::<T>::new(), so we know that `T::Driver` is the right generic parameter to use
         //   here.
+        // - Any type invariants of `Ctx` are upheld by using the same `Ctx` for the `Device` we
+        //   return.
         unsafe { drm::Device::from_raw((*self.as_raw()).dev) }
     }
 
@@ -331,11 +356,16 @@ impl<T: DriverObject> Object<T> {
     }
 }
 
-impl_aref_for_gem_obj!(impl<T> for Object<T> where T: DriverObject);
+impl_aref_for_gem_obj! {
+    impl<T, C> for Object<T, C>
+    where
+        T: DriverObject,
+        C: DeviceContext
+}
 
-impl<T: DriverObject> super::private::Sealed for Object<T> {}
+impl<T: DriverObject, Ctx: DeviceContext> super::private::Sealed for Object<T, Ctx> {}
 
-impl<T: DriverObject> Deref for Object<T> {
+impl<T: DriverObject, Ctx: DeviceContext> Deref for Object<T, Ctx> {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
@@ -343,7 +373,7 @@ impl<T: DriverObject> Deref for Object<T> {
     }
 }
 
-impl<T: DriverObject> AllocImpl for Object<T> {
+impl<T: DriverObject, Ctx: DeviceContext> AllocImpl for Object<T, Ctx> {
     type Driver = T::Driver;
 
     const ALLOC_OPS: AllocOps = AllocOps {
diff --git a/rust/kernel/drm/gem/shmem.rs b/rust/kernel/drm/gem/shmem.rs
index e1b648920d2f..34af402899a0 100644
--- a/rust/kernel/drm/gem/shmem.rs
+++ b/rust/kernel/drm/gem/shmem.rs
@@ -12,10 +12,12 @@
 use crate::{
     container_of,
     drm::{
-        device,
         driver,
         gem,
-        private::Sealed, //
+        private::Sealed,
+        Device,
+        DeviceContext,
+        Registered, //
     },
     error::to_result,
     prelude::*,
@@ -23,11 +25,12 @@ use crate::{
     types::Opaque, //
 };
 use core::{
+    marker::PhantomData,
     ops::{
         Deref,
         DerefMut, //
     },
-    ptr::NonNull,
+    ptr::NonNull, //
 };
 use gem::{
     BaseObjectPrivate,
@@ -40,42 +43,49 @@ use gem::{
 /// This is used with [`Object::new()`] to control various properties that can only be set when
 /// initially creating a shmem-backed GEM object.
 #[derive(Default)]
-pub struct ObjectConfig<'a, T: DriverObject> {
+pub struct ObjectConfig<'a, T: DriverObject, C: DeviceContext = Registered> {
     /// Whether to set the write-combine map flag.
     pub map_wc: bool,
 
     /// Reuse the DMA reservation from another GEM object.
     ///
     /// The newly created [`Object`] will hold an owned refcount to `parent_resv_obj` if specified.
-    pub parent_resv_obj: Option<&'a Object<T>>,
+    pub parent_resv_obj: Option<&'a Object<T, C>>,
 }
 
 /// A shmem-backed GEM object.
 ///
 /// # Invariants
 ///
-/// `obj` contains a valid initialized `struct drm_gem_shmem_object` for the lifetime of this
-/// object.
+/// - `obj` contains a valid initialized `struct drm_gem_shmem_object` for the lifetime of this
+///   object.
+/// - Any type invariants of `C` apply to the parent DRM device for this GEM object.
 #[repr(C)]
 #[pin_data]
-pub struct Object<T: DriverObject> {
+pub struct Object<T: DriverObject, C: DeviceContext = Registered> {
     #[pin]
     obj: Opaque<bindings::drm_gem_shmem_object>,
     /// Parent object that owns this object's DMA reservation object.
-    parent_resv_obj: Option<ARef<Object<T>>>,
+    parent_resv_obj: Option<ARef<Object<T, C>>>,
     #[pin]
     inner: T,
+    _ctx: PhantomData<C>,
 }
 
-super::impl_aref_for_gem_obj!(impl<T> for Object<T> where T: DriverObject);
+super::impl_aref_for_gem_obj! {
+    impl<T, C> for Object<T, C>
+    where
+        T: DriverObject,
+        C: DeviceContext
+}
 
 // SAFETY: All GEM objects are thread-safe.
-unsafe impl<T: DriverObject> Send for Object<T> {}
+unsafe impl<T: DriverObject, C: DeviceContext> Send for Object<T, C> {}
 
 // SAFETY: All GEM objects are thread-safe.
-unsafe impl<T: DriverObject> Sync for Object<T> {}
+unsafe impl<T: DriverObject, C: DeviceContext> Sync for Object<T, C> {}
 
-impl<T: DriverObject> Object<T> {
+impl<T: DriverObject, C: DeviceContext> Object<T, C> {
     /// `drm_gem_object_funcs` vtable suitable for GEM shmem objects.
     const VTABLE: bindings::drm_gem_object_funcs = bindings::drm_gem_object_funcs {
         free: Some(Self::free_callback),
@@ -106,9 +116,9 @@ impl<T: DriverObject> Object<T> {
     ///
     /// Additional config options can be specified using `config`.
     pub fn new(
-        dev: &device::Device<T::Driver>,
+        dev: &Device<T::Driver, C>,
         size: usize,
-        config: ObjectConfig<'_, T>,
+        config: ObjectConfig<'_, T, C>,
         args: T::Args,
     ) -> Result<ARef<Self>> {
         let new: Pin<KBox<Self>> = KBox::try_pin_init(
@@ -116,6 +126,7 @@ impl<T: DriverObject> Object<T> {
                 obj <- Opaque::init_zeroed(),
                 parent_resv_obj: config.parent_resv_obj.map(|p| p.into()),
                 inner <- T::new(dev, size, args),
+                _ctx: PhantomData::<C>,
             }),
             GFP_KERNEL,
         )?;
@@ -148,9 +159,9 @@ impl<T: DriverObject> Object<T> {
     }
 
     /// Returns the `Device` that owns this GEM object.
-    pub fn dev(&self) -> &device::Device<T::Driver> {
+    pub fn dev(&self) -> &Device<T::Driver, C> {
         // SAFETY: `dev` will have been initialized in `Self::new()` by `drm_gem_shmem_init()`.
-        unsafe { device::Device::from_raw((*self.as_raw()).dev) }
+        unsafe { Device::from_raw((*self.as_raw()).dev) }
     }
 
     extern "C" fn free_callback(obj: *mut bindings::drm_gem_object) {
@@ -168,7 +179,7 @@ impl<T: DriverObject> Object<T> {
         // SAFETY:
         // - We verified above that `obj` is valid, which makes `this` valid
         // - This function is set in AllocOps, so we know that `this` is contained within a
-        //   `Object<T>`
+        //   `Object<T, C>`
         let this = unsafe { container_of!(Opaque::cast_from(this), Self, obj) }.cast_mut();
 
         // SAFETY: We're recovering the Kbox<> we created in gem_create_object()
@@ -176,7 +187,7 @@ impl<T: DriverObject> Object<T> {
     }
 }
 
-impl<T: DriverObject> Deref for Object<T> {
+impl<T: DriverObject, C: DeviceContext> Deref for Object<T, C> {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
@@ -184,15 +195,15 @@ impl<T: DriverObject> Deref for Object<T> {
     }
 }
 
-impl<T: DriverObject> DerefMut for Object<T> {
+impl<T: DriverObject, C: DeviceContext> DerefMut for Object<T, C> {
     fn deref_mut(&mut self) -> &mut Self::Target {
         &mut self.inner
     }
 }
 
-impl<T: DriverObject> Sealed for Object<T> {}
+impl<T: DriverObject, C: DeviceContext> Sealed for Object<T, C> {}
 
-impl<T: DriverObject> gem::IntoGEMObject for Object<T> {
+impl<T: DriverObject, C: DeviceContext> gem::IntoGEMObject for Object<T, C> {
     fn as_raw(&self) -> *mut bindings::drm_gem_object {
         // SAFETY:
         // - Our immutable reference is proof that this is safe to dereference.
@@ -200,18 +211,18 @@ impl<T: DriverObject> gem::IntoGEMObject for Object<T> {
         unsafe { &raw mut (*self.obj.get()).base }
     }
 
-    unsafe fn from_raw<'a>(obj: *mut bindings::drm_gem_object) -> &'a Object<T> {
+    unsafe fn from_raw<'a>(obj: *mut bindings::drm_gem_object) -> &'a Self {
         // SAFETY: The safety contract of from_gem_obj() guarantees that `obj` is contained within
         // `Self`
         unsafe {
             let obj = Opaque::cast_from(container_of!(obj, bindings::drm_gem_shmem_object, base));
 
-            &*container_of!(obj, Object<T>, obj)
+            &*container_of!(obj, Self, obj)
         }
     }
 }
 
-impl<T: DriverObject> driver::AllocImpl for Object<T> {
+impl<T: DriverObject, C: DeviceContext> driver::AllocImpl for Object<T, C> {
     type Driver = T::Driver;
 
     const ALLOC_OPS: driver::AllocOps = driver::AllocOps {
diff --git a/rust/kernel/drm/gpuvm/mod.rs b/rust/kernel/drm/gpuvm/mod.rs
new file mode 100644
index 000000000000..ae58f6f667c1
--- /dev/null
+++ b/rust/kernel/drm/gpuvm/mod.rs
@@ -0,0 +1,328 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+
+#![cfg(CONFIG_RUST_DRM_GPUVM)]
+
+//! DRM GPUVM in immediate mode
+//!
+//! Rust abstractions for using GPUVM in immediate mode. This is when the GPUVM state is updated
+//! during `run_job()`, i.e., in the DMA fence signalling critical path, to ensure that the GPUVM
+//! and the GPU's virtual address space has the same state at all times.
+//!
+//! C header: [`include/drm/drm_gpuvm.h`](srctree/include/drm/drm_gpuvm.h)
+
+use kernel::{
+    alloc::{
+        AllocError,
+        Flags as AllocFlags, //
+    },
+    bindings,
+    drm,
+    drm::gem::IntoGEMObject,
+    error::to_result,
+    prelude::*,
+    sync::aref::{
+        ARef,
+        AlwaysRefCounted, //
+    },
+    types::Opaque, //
+};
+
+use core::{
+    cell::UnsafeCell,
+    marker::PhantomData,
+    mem::{
+        ManuallyDrop,
+        MaybeUninit, //
+    },
+    ops::{
+        Deref,
+        DerefMut,
+        Range, //
+    },
+    ptr::{
+        self,
+        NonNull, //
+    }, //
+};
+
+mod sm_ops;
+pub use self::sm_ops::*;
+
+mod vm_bo;
+pub use self::vm_bo::*;
+
+mod va;
+pub use self::va::*;
+
+/// A DRM GPU VA manager.
+///
+/// This object is refcounted, but the locations of mapped ranges may only be accessed or changed
+/// via the special unique handle [`UniqueRefGpuVm`].
+///
+/// # Invariants
+///
+/// * Stored in an allocation managed by the refcount in `self.vm`.
+/// * Access to `data` and the gpuvm interval tree is controlled via the [`UniqueRefGpuVm`] type.
+/// * Does not contain any sparse [`GpuVa<T>`] instances.
+#[pin_data]
+pub struct GpuVm<T: DriverGpuVm> {
+    #[pin]
+    vm: Opaque<bindings::drm_gpuvm>,
+    /// Accessed only through the [`UniqueRefGpuVm`] reference.
+    data: UnsafeCell<T>,
+}
+
+// SAFETY: The GPUVM api does not assume that it is tied to a specific thread. The destructor will
+// drop the `data` field, which is okay because it is guaranteed `Send` by the `DriverGpuVm` trait.
+unsafe impl<T: DriverGpuVm> Send for GpuVm<T> {}
+// SAFETY: The GPUVM api is designed to allow &self methods to be called in parallel.
+unsafe impl<T: DriverGpuVm> Sync for GpuVm<T> {}
+
+// SAFETY: By type invariants, the allocation is managed by the refcount in `self.vm`.
+unsafe impl<T: DriverGpuVm> AlwaysRefCounted for GpuVm<T> {
+    fn inc_ref(&self) {
+        // SAFETY: By type invariants, the allocation is managed by the refcount in `self.vm`.
+        unsafe { bindings::drm_gpuvm_get(self.vm.get()) };
+    }
+
+    unsafe fn dec_ref(obj: NonNull<Self>) {
+        // SAFETY: By type invariants, the allocation is managed by the refcount in `self.vm`.
+        unsafe { bindings::drm_gpuvm_put((*obj.as_ptr()).vm.get()) };
+    }
+}
+
+impl<T: DriverGpuVm> PartialEq for GpuVm<T> {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        core::ptr::eq(self.as_raw(), other.as_raw())
+    }
+}
+impl<T: DriverGpuVm> Eq for GpuVm<T> {}
+
+impl<T: DriverGpuVm> GpuVm<T> {
+    const fn vtable() -> &'static bindings::drm_gpuvm_ops {
+        &bindings::drm_gpuvm_ops {
+            vm_free: Some(Self::vm_free),
+            op_alloc: None,
+            op_free: None,
+            vm_bo_alloc: GpuVmBo::<T>::ALLOC_FN,
+            vm_bo_free: GpuVmBo::<T>::FREE_FN,
+            vm_bo_validate: None,
+            sm_step_map: Some(Self::sm_step_map),
+            sm_step_unmap: Some(Self::sm_step_unmap),
+            sm_step_remap: Some(Self::sm_step_remap),
+        }
+    }
+
+    /// Creates a GPUVM instance.
+    #[expect(clippy::new_ret_no_self)]
+    pub fn new<E>(
+        name: &'static CStr,
+        dev: &drm::Device<T::Driver>,
+        r_obj: &T::Object,
+        range: Range<u64>,
+        reserve_range: Range<u64>,
+        data: T,
+    ) -> Result<UniqueRefGpuVm<T>, E>
+    where
+        E: From<AllocError>,
+        E: From<core::convert::Infallible>,
+    {
+        let obj = KBox::try_pin_init::<E>(
+            try_pin_init!(Self {
+                data: UnsafeCell::new(data),
+                vm <- Opaque::ffi_init(|vm| {
+                    // SAFETY: These arguments are valid. `vm` is valid until refcount drops to
+                    // zero. The `vm` is zeroed before calling this method by `__GFP_ZERO` flag
+                    // below.
+                    unsafe {
+                        bindings::drm_gpuvm_init(
+                            vm,
+                            name.as_char_ptr(),
+                            bindings::drm_gpuvm_flags_DRM_GPUVM_IMMEDIATE_MODE
+                                | bindings::drm_gpuvm_flags_DRM_GPUVM_RESV_PROTECTED,
+                            dev.as_raw(),
+                            r_obj.as_raw(),
+                            range.start,
+                            range.end - range.start,
+                            reserve_range.start,
+                            reserve_range.end - reserve_range.start,
+                            const { Self::vtable() },
+                        )
+                    }
+                }),
+            }? E),
+            GFP_KERNEL | __GFP_ZERO,
+        )?;
+        // SAFETY: This transfers the initial refcount to the ARef.
+        let aref = unsafe {
+            ARef::from_raw(NonNull::new_unchecked(KBox::into_raw(
+                Pin::into_inner_unchecked(obj),
+            )))
+        };
+        // INVARIANT: This reference is unique.
+        Ok(UniqueRefGpuVm(aref))
+    }
+
+    /// Access this [`GpuVm`] from a raw pointer.
+    ///
+    /// # Safety
+    ///
+    /// The pointer must reference the `struct drm_gpuvm` in a valid [`GpuVm<T>`] that remains
+    /// valid for at least `'a`.
+    #[inline]
+    pub unsafe fn from_raw<'a>(ptr: *mut bindings::drm_gpuvm) -> &'a Self {
+        // SAFETY: Caller passes a pointer to the `drm_gpuvm` in a `GpuVm<T>`. Caller ensures the
+        // pointer is valid for 'a.
+        unsafe { &*kernel::container_of!(Opaque::cast_from(ptr), Self, vm) }
+    }
+
+    /// Returns a raw pointer to the embedded `struct drm_gpuvm`.
+    #[inline]
+    pub fn as_raw(&self) -> *mut bindings::drm_gpuvm {
+        self.vm.get()
+    }
+
+    /// The start of the VA space.
+    #[inline]
+    pub fn va_start(&self) -> u64 {
+        // SAFETY: The `mm_start` field is immutable.
+        unsafe { (*self.as_raw()).mm_start }
+    }
+
+    /// The length of the GPU's virtual address space.
+    #[inline]
+    pub fn va_length(&self) -> u64 {
+        // SAFETY: The `mm_range` field is immutable.
+        unsafe { (*self.as_raw()).mm_range }
+    }
+
+    /// Returns the range of the GPU virtual address space.
+    #[inline]
+    pub fn va_range(&self) -> Range<u64> {
+        let start = self.va_start();
+        // OVERFLOW: This reconstructs the Range<u64> passed to the constructor, so it won't fail.
+        let end = start + self.va_length();
+        Range { start, end }
+    }
+
+    /// Get or create the [`GpuVmBo`] for this gem object.
+    #[inline]
+    pub fn obtain(
+        &self,
+        obj: &T::Object,
+        data: impl PinInit<T::VmBoData>,
+    ) -> Result<ARef<GpuVmBo<T>>, AllocError> {
+        Ok(GpuVmBoAlloc::new(self, obj, data)?.obtain())
+    }
+
+    /// Clean up buffer objects that are no longer used.
+    #[inline]
+    pub fn deferred_cleanup(&self) {
+        // SAFETY: This GPUVM uses immediate mode.
+        unsafe { bindings::drm_gpuvm_bo_deferred_cleanup(self.as_raw()) }
+    }
+
+    /// Check if this GEM object is an external object for this GPUVM.
+    #[inline]
+    pub fn is_extobj(&self, obj: &T::Object) -> bool {
+        // SAFETY: We may call this with any GPUVM and GEM object.
+        unsafe { bindings::drm_gpuvm_is_extobj(self.as_raw(), obj.as_raw()) }
+    }
+
+    /// Free this GPUVM.
+    ///
+    /// # Safety
+    ///
+    /// Called when refcount hits zero.
+    unsafe extern "C" fn vm_free(me: *mut bindings::drm_gpuvm) {
+        // SAFETY: Caller passes a pointer to the `drm_gpuvm` in a `GpuVm<T>`.
+        let me = unsafe { kernel::container_of!(Opaque::cast_from(me), Self, vm).cast_mut() };
+        // SAFETY: By type invariants we can free it when refcount hits zero.
+        drop(unsafe { KBox::from_raw(me) })
+    }
+
+    #[inline]
+    fn raw_resv(&self) -> *mut bindings::dma_resv {
+        // SAFETY: `r_obj` is immutable and valid for duration of GPUVM.
+        unsafe { (*(*self.as_raw()).r_obj).resv }
+    }
+}
+
+/// The manager for a GPUVM.
+pub trait DriverGpuVm: Sized + Send {
+    /// Parent `Driver` for this object.
+    type Driver: drm::Driver<Object = Self::Object>;
+
+    /// The kind of GEM object stored in this GPUVM.
+    type Object: IntoGEMObject;
+
+    /// Data stored with each [`struct drm_gpuva`](struct@GpuVa).
+    type VaData;
+
+    /// Data stored with each [`struct drm_gpuvm_bo`](struct@GpuVmBo).
+    type VmBoData;
+
+    /// The private data passed to callbacks.
+    type SmContext<'ctx>;
+
+    /// Indicates that a new mapping should be created.
+    fn sm_step_map<'op, 'ctx>(
+        &mut self,
+        op: OpMap<'op, Self>,
+        context: &mut Self::SmContext<'ctx>,
+    ) -> Result<OpMapped<'op, Self>, Error>;
+
+    /// Indicates that an existing mapping should be removed.
+    fn sm_step_unmap<'op, 'ctx>(
+        &mut self,
+        op: OpUnmap<'op, Self>,
+        context: &mut Self::SmContext<'ctx>,
+    ) -> Result<OpUnmapped<'op, Self>, Error>;
+
+    /// Indicates that an existing mapping should be split up.
+    fn sm_step_remap<'op, 'ctx>(
+        &mut self,
+        op: OpRemap<'op, Self>,
+        context: &mut Self::SmContext<'ctx>,
+    ) -> Result<OpRemapped<'op, Self>, Error>;
+}
+
+/// The core of the DRM GPU VA manager.
+///
+/// This object is a unique reference to the VM that can access the interval tree and the Rust
+/// `data` field.
+///
+/// # Invariants
+///
+/// Each `GpuVm` instance has at most one `UniqueRefGpuVm` reference.
+pub struct UniqueRefGpuVm<T: DriverGpuVm>(ARef<GpuVm<T>>);
+
+// SAFETY: The GPUVM api is designed to allow &self methods to be called in parallel, and
+// concurrent access to `data` is safe due to the `T: Sync` requirement.
+unsafe impl<T: DriverGpuVm + Sync> Sync for UniqueRefGpuVm<T> {}
+
+impl<T: DriverGpuVm> UniqueRefGpuVm<T> {
+    /// Access the data owned by this `UniqueRefGpuVm` immutably.
+    #[inline]
+    pub fn data_ref(&self) -> &T {
+        // SAFETY: By the type invariants we may access `data`.
+        unsafe { &*self.0.data.get() }
+    }
+
+    /// Access the data owned by this `UniqueRefGpuVm` mutably.
+    #[inline]
+    pub fn data(&mut self) -> &mut T {
+        // SAFETY: By the type invariants we may access `data`.
+        unsafe { &mut *self.0.data.get() }
+    }
+}
+
+impl<T: DriverGpuVm> Deref for UniqueRefGpuVm<T> {
+    type Target = GpuVm<T>;
+
+    #[inline]
+    fn deref(&self) -> &GpuVm<T> {
+        &self.0
+    }
+}
diff --git a/rust/kernel/drm/gpuvm/sm_ops.rs b/rust/kernel/drm/gpuvm/sm_ops.rs
new file mode 100644
index 000000000000..69a8e5ab2821
--- /dev/null
+++ b/rust/kernel/drm/gpuvm/sm_ops.rs
@@ -0,0 +1,429 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+
+use super::*;
+
+/// The actual data that gets threaded through the callbacks.
+struct SmData<'a, 'ctx, T: DriverGpuVm> {
+    gpuvm: &'a mut UniqueRefGpuVm<T>,
+    user_context: &'a mut T::SmContext<'ctx>,
+}
+
+/// Adds an extra field to `SmData` for `sm_map()` callbacks.
+///
+/// # Invariants
+///
+/// `self.vm_bo.gpuvm() == self.sm_data.gpuvm`.
+#[repr(C)]
+struct SmMapData<'a, 'ctx, T: DriverGpuVm> {
+    sm_data: SmData<'a, 'ctx, T>,
+    vm_bo: &'a GpuVmBo<T>,
+}
+
+/// The argument for [`UniqueRefGpuVm::sm_map`].
+pub struct OpMapRequest<'a, 'ctx, T: DriverGpuVm> {
+    /// Address in GPU virtual address space.
+    pub addr: u64,
+    /// Length of mapping to create.
+    pub range: u64,
+    /// Offset in GEM object.
+    pub gem_offset: u64,
+    /// The GEM object to map.
+    pub vm_bo: &'a GpuVmBo<T>,
+    /// The user-provided context type.
+    pub context: &'a mut T::SmContext<'ctx>,
+}
+
+impl<'a, 'ctx, T: DriverGpuVm> OpMapRequest<'a, 'ctx, T> {
+    fn raw_request(&self) -> bindings::drm_gpuvm_map_req {
+        bindings::drm_gpuvm_map_req {
+            map: bindings::drm_gpuva_op_map {
+                va: bindings::drm_gpuva_op_map__bindgen_ty_1 {
+                    addr: self.addr,
+                    range: self.range,
+                },
+                gem: bindings::drm_gpuva_op_map__bindgen_ty_2 {
+                    offset: self.gem_offset,
+                    obj: self.vm_bo.obj().as_raw(),
+                },
+            },
+        }
+    }
+}
+
+/// Represents an `sm_step_map` operation that has not yet been completed.
+pub struct OpMap<'op, T: DriverGpuVm> {
+    op: &'op bindings::drm_gpuva_op_map,
+    // Since these abstractions are designed for immediate mode, the VM BO needs to be
+    // pre-allocated, so we always have it available when we reach this point.
+    vm_bo: &'op GpuVmBo<T>,
+    // This ensures that 'op is invariant, so that `OpMap<'long, T>` does not
+    // coerce to `OpMap<'short, T>`. This ensures that the user can't return
+    // the wrong `OpMapped` value.
+    _invariant: PhantomData<*mut &'op mut T>,
+}
+
+impl<'op, T: DriverGpuVm> OpMap<'op, T> {
+    /// The base address of the new mapping.
+    pub fn addr(&self) -> u64 {
+        self.op.va.addr
+    }
+
+    /// The length of the new mapping.
+    pub fn length(&self) -> u64 {
+        self.op.va.range
+    }
+
+    /// The offset within the [`drm_gem_object`](DriverGpuVm::Object).
+    pub fn gem_offset(&self) -> u64 {
+        self.op.gem.offset
+    }
+
+    /// The [`drm_gem_object`](DriverGpuVm::Object) to map.
+    pub fn obj(&self) -> &T::Object {
+        // SAFETY: The `obj` pointer is guaranteed to be valid.
+        unsafe { <T::Object as IntoGEMObject>::from_raw(self.op.gem.obj) }
+    }
+
+    /// The [`GpuVmBo`] that the new VA will be associated with.
+    pub fn vm_bo(&self) -> &GpuVmBo<T> {
+        self.vm_bo
+    }
+
+    /// Use the pre-allocated VA to carry out this map operation.
+    pub fn insert(self, va: GpuVaAlloc<T>, va_data: impl PinInit<T::VaData>) -> OpMapped<'op, T> {
+        let va = va.prepare(va_data);
+        // SAFETY: By the type invariants we may access the interval tree.
+        unsafe { bindings::drm_gpuva_map(self.vm_bo.gpuvm().as_raw(), va, self.op) };
+
+        let _gpuva_guard = self.vm_bo().lock_gpuva();
+        // SAFETY: The va is prepared for insertion, and we hold the GEM lock.
+        unsafe { bindings::drm_gpuva_link(va, self.vm_bo.as_raw()) };
+
+        OpMapped {
+            _invariant: self._invariant,
+        }
+    }
+}
+
+/// Represents a completed [`OpMap`] operation.
+pub struct OpMapped<'op, T> {
+    _invariant: PhantomData<*mut &'op mut T>,
+}
+
+/// Represents an `sm_step_unmap` operation that has not yet been completed.
+pub struct OpUnmap<'op, T: DriverGpuVm> {
+    op: &'op bindings::drm_gpuva_op_unmap,
+    // This ensures that 'op is invariant, so that `OpUnmap<'long, T>` does not
+    // coerce to `OpUnmap<'short, T>`. This ensures that the user can't return the
+    // wrong`OpUnmapped` value.
+    _invariant: PhantomData<*mut &'op mut T>,
+}
+
+impl<'op, T: DriverGpuVm> OpUnmap<'op, T> {
+    /// Indicates whether this [`GpuVa`] is physically contiguous with the
+    /// original mapping request.
+    ///
+    /// Optionally, if `keep` is set, drivers may keep the actual page table
+    /// mappings for this `drm_gpuva`, adding the missing page table entries
+    /// only and update the `drm_gpuvm` accordingly.
+    pub fn keep(&self) -> bool {
+        self.op.keep
+    }
+
+    /// The range being unmapped.
+    pub fn va(&self) -> &GpuVa<T> {
+        // SAFETY: This is a valid va. It's not the `kernel_alloc_node` because you can't unmap it,
+        // and it's not sparse by the `GpuVm<T>` type invariants.
+        unsafe { GpuVa::<T>::from_raw(self.op.va) }
+    }
+
+    /// Remove the VA.
+    pub fn remove(self) -> (OpUnmapped<'op, T>, GpuVaRemoved<T>) {
+        // SAFETY: The op references a valid drm_gpuva in the GPUVM.
+        unsafe { bindings::drm_gpuva_unmap(self.op) };
+        // SAFETY: The va is no longer in the interval tree so we may unlink it.
+        unsafe { bindings::drm_gpuva_unlink_defer(self.op.va) };
+
+        // SAFETY: We just removed this va from the `GpuVm<T>`.
+        let va = unsafe { GpuVaRemoved::from_raw(self.op.va) };
+
+        (
+            OpUnmapped {
+                _invariant: self._invariant,
+            },
+            va,
+        )
+    }
+}
+
+/// Represents a completed [`OpUnmap`] operation.
+pub struct OpUnmapped<'op, T> {
+    _invariant: PhantomData<*mut &'op mut T>,
+}
+
+/// Represents an `sm_step_remap` operation that has not yet been completed.
+pub struct OpRemap<'op, T: DriverGpuVm> {
+    op: &'op bindings::drm_gpuva_op_remap,
+    // This ensures that 'op is invariant, so that `OpRemap<'long, T>` does not
+    // coerce to `OpRemap<'short, T>`. This ensures that the user can't return the
+    // wrong`OpRemapped` value.
+    _invariant: PhantomData<*mut &'op mut T>,
+}
+
+impl<'op, T: DriverGpuVm> OpRemap<'op, T> {
+    /// The preceding part of a split mapping.
+    #[inline]
+    pub fn prev(&self) -> Option<&OpRemapMapData> {
+        // SAFETY: We checked for null, so the pointer must be valid.
+        NonNull::new(self.op.prev).map(|ptr| unsafe { OpRemapMapData::from_raw(ptr) })
+    }
+
+    /// The subsequent part of a split mapping.
+    #[inline]
+    pub fn next(&self) -> Option<&OpRemapMapData> {
+        // SAFETY: We checked for null, so the pointer must be valid.
+        NonNull::new(self.op.next).map(|ptr| unsafe { OpRemapMapData::from_raw(ptr) })
+    }
+
+    /// Indicates whether the `drm_gpuva` being removed is physically contiguous with the original
+    /// mapping request.
+    ///
+    /// Optionally, if `keep` is set, drivers may keep the actual page table mappings for this
+    /// `drm_gpuva`, adding the missing page table entries only and update the `drm_gpuvm`
+    /// accordingly.
+    #[inline]
+    pub fn keep(&self) -> bool {
+        // SAFETY: The unmap pointer is always valid.
+        unsafe { (*self.op.unmap).keep }
+    }
+
+    /// The range being unmapped.
+    #[inline]
+    pub fn va_to_unmap(&self) -> &GpuVa<T> {
+        // SAFETY: This is a valid va. It's not the `kernel_alloc_node` because you can't unmap it,
+        // and it's not sparse by the `GpuVm<T>` type invariants.
+        unsafe { GpuVa::<T>::from_raw((*self.op.unmap).va) }
+    }
+
+    /// The [`drm_gem_object`](DriverGpuVm::Object) whose VA is being remapped.
+    #[inline]
+    pub fn obj(&self) -> &T::Object {
+        self.va_to_unmap().obj()
+    }
+
+    /// The [`GpuVmBo`] that is being remapped.
+    #[inline]
+    pub fn vm_bo(&self) -> &GpuVmBo<T> {
+        self.va_to_unmap().vm_bo()
+    }
+
+    /// Update the GPUVM to perform the remapping.
+    pub fn remap(
+        self,
+        va_alloc: [GpuVaAlloc<T>; 2],
+        prev_data: impl PinInit<T::VaData>,
+        next_data: impl PinInit<T::VaData>,
+    ) -> (OpRemapped<'op, T>, OpRemapRet<T>) {
+        let [va1, va2] = va_alloc;
+
+        let mut unused_va = None;
+        let mut prev_ptr = ptr::null_mut();
+        let mut next_ptr = ptr::null_mut();
+        if self.prev().is_some() {
+            prev_ptr = va1.prepare(prev_data);
+        } else {
+            unused_va = Some(va1);
+        }
+        if self.next().is_some() {
+            next_ptr = va2.prepare(next_data);
+        } else {
+            unused_va = Some(va2);
+        }
+
+        // SAFETY: the pointers are non-null when required
+        unsafe { bindings::drm_gpuva_remap(prev_ptr, next_ptr, self.op) };
+
+        let gpuva_guard = self.vm_bo().lock_gpuva();
+        if !prev_ptr.is_null() {
+            // SAFETY: The prev_ptr is a valid drm_gpuva prepared for insertion. The vm_bo is still
+            // valid as the not-yet-unlinked gpuva holds a refcount on the vm_bo.
+            unsafe { bindings::drm_gpuva_link(prev_ptr, self.vm_bo().as_raw()) };
+        }
+        if !next_ptr.is_null() {
+            // SAFETY: The next_ptr is a valid drm_gpuva prepared for insertion. The vm_bo is still
+            // valid as the not-yet-unlinked gpuva holds a refcount on the vm_bo.
+            unsafe { bindings::drm_gpuva_link(next_ptr, self.vm_bo().as_raw()) };
+        }
+        drop(gpuva_guard);
+
+        // SAFETY: The va is no longer in the interval tree so we may unlink it.
+        unsafe { bindings::drm_gpuva_unlink_defer((*self.op.unmap).va) };
+
+        (
+            OpRemapped {
+                _invariant: self._invariant,
+            },
+            OpRemapRet {
+                // SAFETY: We just removed this va from the `GpuVm<T>`.
+                unmapped_va: unsafe { GpuVaRemoved::from_raw((*self.op.unmap).va) },
+                unused_va,
+            },
+        )
+    }
+}
+
+/// Part of an [`OpRemap`] that represents a new mapping.
+#[repr(transparent)]
+pub struct OpRemapMapData(bindings::drm_gpuva_op_map);
+
+impl OpRemapMapData {
+    /// # Safety
+    /// Must reference a valid `drm_gpuva_op_map` for duration of `'a`.
+    unsafe fn from_raw<'a>(ptr: NonNull<bindings::drm_gpuva_op_map>) -> &'a Self {
+        // SAFETY: ok per safety requirements
+        unsafe { ptr.cast().as_ref() }
+    }
+
+    /// The base address of the new mapping.
+    pub fn addr(&self) -> u64 {
+        self.0.va.addr
+    }
+
+    /// The length of the new mapping.
+    pub fn length(&self) -> u64 {
+        self.0.va.range
+    }
+
+    /// The offset within the [`drm_gem_object`](DriverGpuVm::Object).
+    pub fn gem_offset(&self) -> u64 {
+        self.0.gem.offset
+    }
+}
+
+/// Struct containing objects removed or not used by [`OpRemap::remap`].
+pub struct OpRemapRet<T: DriverGpuVm> {
+    /// The `drm_gpuva` that was removed.
+    pub unmapped_va: GpuVaRemoved<T>,
+    /// If the remap did not split the region into two pieces, then the unused `drm_gpuva` is
+    /// returned here.
+    pub unused_va: Option<GpuVaAlloc<T>>,
+}
+
+/// Represents a completed [`OpRemap`] operation.
+pub struct OpRemapped<'op, T> {
+    _invariant: PhantomData<*mut &'op mut T>,
+}
+
+impl<T: DriverGpuVm> UniqueRefGpuVm<T> {
+    /// Create a mapping, removing or remapping anything that overlaps.
+    ///
+    /// Internally calls the [`DriverGpuVm`] callbacks similar to [`Self::sm_unmap`], except that
+    /// the [`DriverGpuVm::sm_step_map`] is called once to create the requested mapping.
+    #[inline]
+    pub fn sm_map(&mut self, req: OpMapRequest<'_, '_, T>) -> Result {
+        if req.vm_bo.gpuvm() != &**self {
+            return Err(EINVAL);
+        }
+
+        let gpuvm = self.as_raw();
+        let raw_req = req.raw_request();
+        // INVARIANT: Checked above that `vm_bo.gpuvm() == self`.
+        let mut p = SmMapData {
+            sm_data: SmData {
+                gpuvm: self,
+                user_context: req.context,
+            },
+            vm_bo: req.vm_bo,
+        };
+        // SAFETY:
+        // * raw_request() creates a valid request.
+        // * The private data is valid to be interpreted as both SmData and SmMapData since the
+        //   first field of SmMapData is SmData.
+        to_result(unsafe {
+            bindings::drm_gpuvm_sm_map(gpuvm, (&raw mut p).cast(), &raw const raw_req)
+        })
+    }
+
+    /// Remove any mappings in the given region.
+    ///
+    /// Internally calls [`DriverGpuVm::sm_step_unmap`] for ranges entirely contained within the
+    /// given range, and [`DriverGpuVm::sm_step_remap`] for ranges that overlap with the range.
+    #[inline]
+    pub fn sm_unmap(&mut self, addr: u64, length: u64, context: &mut T::SmContext<'_>) -> Result {
+        let gpuvm = self.as_raw();
+        let mut p = SmData {
+            gpuvm: self,
+            user_context: context,
+        };
+        // SAFETY:
+        // * raw_request() creates a valid request.
+        // * The private data is a valid SmData.
+        to_result(unsafe { bindings::drm_gpuvm_sm_unmap(gpuvm, (&raw mut p).cast(), addr, length) })
+    }
+}
+
+impl<T: DriverGpuVm> GpuVm<T> {
+    /// # Safety
+    /// Must be called from `sm_map` with a pointer to `SmMapData`.
+    pub(super) unsafe extern "C" fn sm_step_map(
+        op: *mut bindings::drm_gpuva_op,
+        p: *mut c_void,
+    ) -> c_int {
+        // SAFETY: If we reach `sm_step_map` then we were called from `sm_map` which always passes
+        // an `SmMapData` as private data.
+        let p = unsafe { &mut *p.cast::<SmMapData<'_, '_, T>>() };
+        let op = OpMap {
+            // SAFETY: sm_step_map is called with a map operation.
+            op: unsafe { &(*op).__bindgen_anon_1.map },
+            vm_bo: p.vm_bo,
+            _invariant: PhantomData,
+        };
+        match p
+            .sm_data
+            .gpuvm
+            .data()
+            .sm_step_map(op, p.sm_data.user_context)
+        {
+            Ok(OpMapped { .. }) => 0,
+            Err(err) => err.to_errno(),
+        }
+    }
+
+    /// # Safety
+    /// Must be called from `sm_map` or `sm_unmap` with a pointer to `SmMapData` or `SmData`.
+    pub(super) unsafe extern "C" fn sm_step_unmap(
+        op: *mut bindings::drm_gpuva_op,
+        p: *mut c_void,
+    ) -> c_int {
+        // SAFETY: The caller provides a pointer that can be treated as `SmData`.
+        let p = unsafe { &mut *p.cast::<SmData<'_, '_, T>>() };
+        let op = OpUnmap {
+            // SAFETY: sm_step_unmap is called with an unmap operation.
+            op: unsafe { &(*op).__bindgen_anon_1.unmap },
+            _invariant: PhantomData,
+        };
+        match p.gpuvm.data().sm_step_unmap(op, p.user_context) {
+            Ok(OpUnmapped { .. }) => 0,
+            Err(err) => err.to_errno(),
+        }
+    }
+
+    /// # Safety
+    /// Must be called from `sm_map` or `sm_unmap` with a pointer to `SmMapData` or `SmData`.
+    pub(super) unsafe extern "C" fn sm_step_remap(
+        op: *mut bindings::drm_gpuva_op,
+        p: *mut c_void,
+    ) -> c_int {
+        // SAFETY: The caller provides a pointer that can be treated as `SmData`.
+        let p = unsafe { &mut *p.cast::<SmData<'_, '_, T>>() };
+        let op = OpRemap {
+            // SAFETY: sm_step_remap is called with a remap operation.
+            op: unsafe { &(*op).__bindgen_anon_1.remap },
+            _invariant: PhantomData,
+        };
+        match p.gpuvm.data().sm_step_remap(op, p.user_context) {
+            Ok(OpRemapped { .. }) => 0,
+            Err(err) => err.to_errno(),
+        }
+    }
+}
diff --git a/rust/kernel/drm/gpuvm/va.rs b/rust/kernel/drm/gpuvm/va.rs
new file mode 100644
index 000000000000..0b09fe44ab39
--- /dev/null
+++ b/rust/kernel/drm/gpuvm/va.rs
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+
+use super::*;
+
+/// Represents that a range of a GEM object is mapped in this [`GpuVm`] instance.
+///
+/// Does not assume that GEM lock is held.
+///
+/// # Invariants
+///
+/// * This is a valid `drm_gpuva` object that is resident in a [`GpuVm<T>`] instance.
+/// * It is associated with a [`GpuVmBo<T>`]. Or in other words, it's not an
+///   `gpuvm->kernel_alloc_node` and `DRM_GPUVA_SPARSE` is not set.
+/// * The associated [`GpuVmBo<T>`] is part of the GEM list.
+#[repr(C)]
+#[pin_data]
+pub struct GpuVa<T: DriverGpuVm> {
+    #[pin]
+    inner: Opaque<bindings::drm_gpuva>,
+    #[pin]
+    data: T::VaData,
+}
+
+impl<T: DriverGpuVm> PartialEq for GpuVa<T> {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        core::ptr::eq(self.as_raw(), other.as_raw())
+    }
+}
+impl<T: DriverGpuVm> Eq for GpuVa<T> {}
+
+impl<T: DriverGpuVm> GpuVa<T> {
+    /// Access this [`GpuVa`] from a raw pointer.
+    ///
+    /// # Safety
+    ///
+    /// * For the duration of `'a`, the pointer must reference a valid `drm_gpuva` associated with
+    ///   a [`GpuVm<T>`].
+    /// * It must be associated with a [`GpuVmBo<T>`].
+    /// * The associated [`GpuVmBo<T>`] is part of the GEM list.
+    #[inline]
+    pub unsafe fn from_raw<'a>(ptr: *mut bindings::drm_gpuva) -> &'a Self {
+        // CAST: `drm_gpuva` is first field and `repr(C)`.
+        // SAFETY: The safety requirements match the invariants of `GpuVa`.
+        unsafe { &*ptr.cast() }
+    }
+
+    /// Returns a raw pointer to underlying C value.
+    #[inline]
+    pub fn as_raw(&self) -> *mut bindings::drm_gpuva {
+        self.inner.get()
+    }
+
+    /// Returns the address of this mapping in the GPU virtual address space.
+    #[inline]
+    pub fn addr(&self) -> u64 {
+        // SAFETY: The `va.addr` field of `drm_gpuva` is immutable.
+        unsafe { (*self.as_raw()).va.addr }
+    }
+
+    /// Returns the length of this mapping.
+    #[inline]
+    pub fn length(&self) -> u64 {
+        // SAFETY: The `va.range` field of `drm_gpuva` is immutable.
+        unsafe { (*self.as_raw()).va.range }
+    }
+
+    /// Returns `addr..addr+length`.
+    #[inline]
+    pub fn range(&self) -> Range<u64> {
+        let addr = self.addr();
+        addr..addr + self.length()
+    }
+
+    /// Returns the offset within the GEM object.
+    #[inline]
+    pub fn gem_offset(&self) -> u64 {
+        // SAFETY: The `gem.offset` field of `drm_gpuva` is immutable.
+        unsafe { (*self.as_raw()).gem.offset }
+    }
+
+    /// Returns the GEM object.
+    #[inline]
+    pub fn obj(&self) -> &T::Object {
+        // SAFETY: The `gem.obj` field of `drm_gpuva` is immutable. We know that it's not null
+        // because this VA is associated with a `GpuVmBo<T>`.
+        unsafe { <T::Object as IntoGEMObject>::from_raw((*self.as_raw()).gem.obj) }
+    }
+
+    /// Returns the underlying [`GpuVmBo`] object that backs this [`GpuVa`].
+    #[inline]
+    pub fn vm_bo(&self) -> &GpuVmBo<T> {
+        // SAFETY: The `vm_bo` field of `drm_gpuva` is immutable. We know that it's not null
+        // because this VA is associated with a `GpuVmBo<T>`. The BO is in the GEM list by the type
+        // invariants.
+        unsafe { GpuVmBo::from_raw((*self.as_raw()).vm_bo) }
+    }
+}
+
+/// A pre-allocated [`GpuVa`] object.
+///
+/// # Invariants
+///
+/// The memory is zeroed.
+pub struct GpuVaAlloc<T: DriverGpuVm>(KBox<MaybeUninit<GpuVa<T>>>);
+
+impl<T: DriverGpuVm> GpuVaAlloc<T> {
+    /// Pre-allocate a [`GpuVa`] object.
+    pub fn new(flags: AllocFlags) -> Result<GpuVaAlloc<T>, AllocError> {
+        // INVARIANTS: Memory allocated with __GFP_ZERO.
+        Ok(GpuVaAlloc(KBox::new_uninit(flags | __GFP_ZERO)?))
+    }
+
+    /// Prepare this `drm_gpuva` for insertion into the GPUVM.
+    #[must_use]
+    pub(super) fn prepare(mut self, va_data: impl PinInit<T::VaData>) -> *mut bindings::drm_gpuva {
+        let va_ptr = MaybeUninit::as_mut_ptr(&mut self.0);
+        // SAFETY: The `data` field is pinned.
+        let Ok(()) = unsafe { va_data.__pinned_init(&raw mut (*va_ptr).data) };
+        KBox::into_raw(self.0).cast()
+    }
+}
+
+/// A [`GpuVa`] object that has been removed.
+///
+/// # Invariants
+///
+/// The `drm_gpuva` is not resident in the [`GpuVm`].
+pub struct GpuVaRemoved<T: DriverGpuVm>(KBox<GpuVa<T>>);
+
+impl<T: DriverGpuVm> GpuVaRemoved<T> {
+    /// Convert a raw pointer into a [`GpuVaRemoved`].
+    ///
+    /// # Safety
+    ///
+    /// * Must have been removed from a [`GpuVm<T>`].
+    /// * It must not be a `gpuvm->kernel_alloc_node` va.
+    pub(super) unsafe fn from_raw(ptr: *mut bindings::drm_gpuva) -> Self {
+        // SAFETY: Since it used to be a VA in a `GpuVm<T>` and it's not a kernel_alloc_node, this
+        // pointer references a `GpuVa<T>` with a valid `T::VaData`. Since it has been removed, we
+        // can take ownership of the allocation.
+        GpuVaRemoved(unsafe { KBox::from_raw(ptr.cast()) })
+    }
+
+    /// Take ownership of the VA data.
+    pub fn into_inner(self) -> T::VaData
+    where
+        T::VaData: Unpin,
+    {
+        KBox::into_inner(self.0).data
+    }
+}
+
+impl<T: DriverGpuVm> Deref for GpuVaRemoved<T> {
+    type Target = T::VaData;
+    fn deref(&self) -> &T::VaData {
+        &self.0.data
+    }
+}
+
+impl<T: DriverGpuVm> DerefMut for GpuVaRemoved<T>
+where
+    T::VaData: Unpin,
+{
+    fn deref_mut(&mut self) -> &mut T::VaData {
+        &mut self.0.data
+    }
+}
diff --git a/rust/kernel/drm/gpuvm/vm_bo.rs b/rust/kernel/drm/gpuvm/vm_bo.rs
new file mode 100644
index 000000000000..c064ac63897b
--- /dev/null
+++ b/rust/kernel/drm/gpuvm/vm_bo.rs
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+
+use super::*;
+
+/// Represents that a given GEM object has at least one mapping on this [`GpuVm`] instance.
+///
+/// Does not assume that GEM lock is held.
+///
+/// # Invariants
+///
+/// * Allocated with `kmalloc` and refcounted via `inner`.
+/// * Is present in the gem list.
+#[repr(C)]
+#[pin_data]
+pub struct GpuVmBo<T: DriverGpuVm> {
+    #[pin]
+    inner: Opaque<bindings::drm_gpuvm_bo>,
+    #[pin]
+    data: T::VmBoData,
+}
+
+// SAFETY: By type invariants, the allocation is managed by the refcount in `self.inner`.
+unsafe impl<T: DriverGpuVm> AlwaysRefCounted for GpuVmBo<T> {
+    fn inc_ref(&self) {
+        // SAFETY: By type invariants, the allocation is managed by the refcount in `self.inner`.
+        unsafe { bindings::drm_gpuvm_bo_get(self.inner.get()) };
+    }
+
+    unsafe fn dec_ref(obj: NonNull<Self>) {
+        // CAST: `drm_gpuvm_bo` is first field of repr(C) struct.
+        // SAFETY: By type invariants, the allocation is managed by the refcount in `self.inner`.
+        // This GPUVM instance uses immediate mode, so we may put the refcount using the deferred
+        // mechanism.
+        unsafe { bindings::drm_gpuvm_bo_put_deferred(obj.as_ptr().cast()) };
+    }
+}
+
+impl<T: DriverGpuVm> PartialEq for GpuVmBo<T> {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        core::ptr::eq(self.as_raw(), other.as_raw())
+    }
+}
+impl<T: DriverGpuVm> Eq for GpuVmBo<T> {}
+
+impl<T: DriverGpuVm> GpuVmBo<T> {
+    /// The function pointer for allocating a GpuVmBo stored in the gpuvm vtable.
+    ///
+    /// Allocation is always implemented according to [`Self::vm_bo_alloc`], but it is set to
+    /// `None` if the default gpuvm behavior is the same as `vm_bo_alloc`.
+    ///
+    /// This may be `Some` even if `FREE_FN` is `None`, or vice-versa.
+    pub(super) const ALLOC_FN: Option<unsafe extern "C" fn() -> *mut bindings::drm_gpuvm_bo> = {
+        use core::alloc::Layout;
+        let base = Layout::new::<bindings::drm_gpuvm_bo>();
+        let rust = Layout::new::<Self>();
+        assert!(base.size() <= rust.size());
+        if base.size() != rust.size() || base.align() != rust.align() {
+            Some(Self::vm_bo_alloc)
+        } else {
+            // This causes GPUVM to allocate a `GpuVmBo<T>` with `kzalloc(sizeof(drm_gpuvm_bo))`.
+            None
+        }
+    };
+
+    /// The function pointer for freeing a GpuVmBo stored in the gpuvm vtable.
+    ///
+    /// Freeing is always implemented according to [`Self::vm_bo_free`], but it is set to `None` if
+    /// the default gpuvm behavior is the same as `vm_bo_free`.
+    ///
+    /// This may be `Some` even if `ALLOC_FN` is `None`, or vice-versa.
+    pub(super) const FREE_FN: Option<unsafe extern "C" fn(*mut bindings::drm_gpuvm_bo)> = {
+        if core::mem::needs_drop::<Self>() {
+            Some(Self::vm_bo_free)
+        } else {
+            // This causes GPUVM to free a `GpuVmBo<T>` with `kfree`.
+            None
+        }
+    };
+
+    /// Custom function for allocating a `drm_gpuvm_bo`.
+    ///
+    /// # Safety
+    ///
+    /// Always safe to call.
+    unsafe extern "C" fn vm_bo_alloc() -> *mut bindings::drm_gpuvm_bo {
+        let raw_ptr = KBox::<Self>::new_uninit(GFP_KERNEL | __GFP_ZERO)
+            .map(KBox::into_raw)
+            .unwrap_or(ptr::null_mut());
+
+        // CAST: `drm_gpuvm_bo` is first field of `Self`.
+        raw_ptr.cast()
+    }
+
+    /// Custom function for freeing a `drm_gpuvm_bo`.
+    ///
+    /// # Safety
+    ///
+    /// The pointer must have been allocated with [`GpuVmBo::ALLOC_FN`], and must not be used after
+    /// this call.
+    unsafe extern "C" fn vm_bo_free(ptr: *mut bindings::drm_gpuvm_bo) {
+        // CAST: `drm_gpuvm_bo` is first field of `Self`.
+        // SAFETY:
+        // * The ptr was allocated from kmalloc with the layout of `GpuVmBo<T>`.
+        // * `ptr->inner` has no destructor.
+        // * `ptr->data` contains a valid `T::VmBoData` that we can drop.
+        drop(unsafe { KBox::<Self>::from_raw(ptr.cast()) });
+    }
+
+    /// Access this [`GpuVmBo`] from a raw pointer.
+    ///
+    /// # Safety
+    ///
+    /// For the duration of `'a`, the pointer must reference a valid `drm_gpuvm_bo` associated with
+    /// a [`GpuVm<T>`]. The BO must also be present in the GEM list.
+    #[inline]
+    pub(crate) unsafe fn from_raw<'a>(ptr: *mut bindings::drm_gpuvm_bo) -> &'a Self {
+        // SAFETY: `drm_gpuvm_bo` is first field and `repr(C)`.
+        unsafe { &*ptr.cast() }
+    }
+
+    /// Returns a raw pointer to underlying C value.
+    #[inline]
+    pub fn as_raw(&self) -> *mut bindings::drm_gpuvm_bo {
+        self.inner.get()
+    }
+
+    /// The [`GpuVm`] that this GEM object is mapped in.
+    #[inline]
+    pub fn gpuvm(&self) -> &GpuVm<T> {
+        // SAFETY: The `obj` pointer is guaranteed to be valid.
+        unsafe { GpuVm::<T>::from_raw((*self.inner.get()).vm) }
+    }
+
+    /// The [`drm_gem_object`](DriverGpuVm::Object) for these mappings.
+    #[inline]
+    pub fn obj(&self) -> &T::Object {
+        // SAFETY: The `obj` pointer is guaranteed to be valid.
+        unsafe { <T::Object as IntoGEMObject>::from_raw((*self.inner.get()).obj) }
+    }
+
+    /// The driver data with this buffer object.
+    #[inline]
+    pub fn data(&self) -> &T::VmBoData {
+        &self.data
+    }
+
+    pub(super) fn lock_gpuva(&self) -> crate::sync::MutexGuard<'_, ()> {
+        // SAFETY: The GEM object is valid.
+        let ptr = unsafe { &raw mut (*self.obj().as_raw()).gpuva.lock };
+        // SAFETY: The GEM object is valid, so the mutex is properly initialized.
+        let mutex = unsafe { crate::sync::Mutex::from_raw(ptr) };
+        mutex.lock()
+    }
+}
+
+/// A pre-allocated [`GpuVmBo`] object.
+///
+/// # Invariants
+///
+/// Points at a `drm_gpuvm_bo` that contains a valid `T::VmBoData`, has a refcount of one, and is
+/// absent from any gem, extobj, or evict lists.
+pub(super) struct GpuVmBoAlloc<T: DriverGpuVm>(NonNull<GpuVmBo<T>>);
+
+impl<T: DriverGpuVm> GpuVmBoAlloc<T> {
+    /// Create a new pre-allocated [`GpuVmBo`].
+    ///
+    /// It's intentional that the initializer is infallible because `drm_gpuvm_bo_put` will call
+    /// drop on the data, so we don't have a way to free it when the data is missing.
+    #[inline]
+    pub(super) fn new(
+        gpuvm: &GpuVm<T>,
+        gem: &T::Object,
+        value: impl PinInit<T::VmBoData>,
+    ) -> Result<GpuVmBoAlloc<T>, AllocError> {
+        // CAST: `GpuVmBoAlloc::vm_bo_alloc` ensures that this memory was allocated with the layout
+        // of `GpuVmBo<T>`. The type is repr(C), so `container_of` is not required.
+        // SAFETY: The provided gpuvm and gem ptrs are valid for the duration of this call.
+        let raw_ptr = unsafe {
+            bindings::drm_gpuvm_bo_create(gpuvm.as_raw(), gem.as_raw()).cast::<GpuVmBo<T>>()
+        };
+        let ptr = NonNull::new(raw_ptr).ok_or(AllocError)?;
+        // SAFETY: `ptr->data` is a valid pinned location.
+        let Ok(()) = unsafe { value.__pinned_init(&raw mut (*raw_ptr).data) };
+        // INVARIANTS: We just created the vm_bo so it's absent from lists, and the data is valid
+        // as we just initialized it.
+        Ok(GpuVmBoAlloc(ptr))
+    }
+
+    /// Returns a raw pointer to underlying C value.
+    #[inline]
+    pub(super) fn as_raw(&self) -> *mut bindings::drm_gpuvm_bo {
+        // SAFETY: The pointer references a valid `drm_gpuvm_bo`.
+        unsafe { (*self.0.as_ptr()).inner.get() }
+    }
+
+    /// Look up whether there is an existing [`GpuVmBo`] for this gem object.
+    ///
+    /// The caller should not hold the GEM mutex or DMA resv lock.
+    #[inline]
+    pub(super) fn obtain(self) -> ARef<GpuVmBo<T>> {
+        let me = ManuallyDrop::new(self);
+        // SAFETY: Valid `drm_gpuvm_bo` not already in the lists. We do not access `me` after this
+        // call.
+        let ptr = unsafe { bindings::drm_gpuvm_bo_obtain_prealloc(me.as_raw()) };
+
+        // SAFETY: `drm_gpuvm_bo_obtain_prealloc` always returns a non-null ptr
+        let nonnull = unsafe { NonNull::new_unchecked(ptr.cast()) };
+
+        // INVARIANTS: `drm_gpuvm_bo_obtain_prealloc` ensures that the bo is in the GEM list.
+        // SAFETY: We received one refcount from `drm_gpuvm_bo_obtain_prealloc`.
+        let ret = unsafe { ARef::<GpuVmBo<T>>::from_raw(nonnull) };
+
+        // Ensure that external objects are in the extobj list.
+        //
+        // Note that we must call `extobj_add` even if `ptr != me` to avoid a race condition where
+        // we could end up using the extobj before the thread with `ptr == me` calls extobj_add.
+        if ret.gpuvm().is_extobj(ret.obj()) {
+            let resv_lock = ret.gpuvm().raw_resv();
+            // TODO: Use a proper lock guard here once a dma_resv lock abstraction exists.
+            // SAFETY: The GPUVM is still alive, so its resv lock is too.
+            unsafe { bindings::dma_resv_lock(resv_lock, ptr::null_mut()) };
+            // SAFETY: We hold the GPUVMs resv lock.
+            unsafe { bindings::drm_gpuvm_bo_extobj_add(ptr) };
+            // SAFETY: We took the lock, so we can unlock it.
+            unsafe { bindings::dma_resv_unlock(resv_lock) };
+        }
+
+        ret
+    }
+}
+
+impl<T: DriverGpuVm> Deref for GpuVmBoAlloc<T> {
+    type Target = GpuVmBo<T>;
+    #[inline]
+    fn deref(&self) -> &GpuVmBo<T> {
+        // SAFETY: By the type invariants we may deref while `Self` exists.
+        unsafe { self.0.as_ref() }
+    }
+}
+
+impl<T: DriverGpuVm> Drop for GpuVmBoAlloc<T> {
+    #[inline]
+    fn drop(&mut self) {
+        // TODO: Call drm_gpuvm_bo_destroy_not_in_lists() directly.
+        // SAFETY: It's safe to perform a deferred put in any context.
+        unsafe { bindings::drm_gpuvm_bo_put_deferred(self.as_raw()) };
+    }
+}
diff --git a/rust/kernel/drm/mod.rs b/rust/kernel/drm/mod.rs
index 1b82b6945edf..a66e7166f66b 100644
--- a/rust/kernel/drm/mod.rs
+++ b/rust/kernel/drm/mod.rs
@@ -6,9 +6,14 @@ pub mod device;
 pub mod driver;
 pub mod file;
 pub mod gem;
+pub mod gpuvm;
 pub mod ioctl;
 
 pub use self::device::Device;
+pub use self::device::DeviceContext;
+pub use self::device::Registered;
+pub use self::device::Uninit;
+pub use self::device::UnregisteredDevice;
 pub use self::driver::Driver;
 pub use self::driver::DriverInfo;
 pub use self::driver::Registration;