Merge tag 'drm-rust-next-2026-06-04' of https://gitlab.freedesktop.org/drm/rust/kernel into drm-next

DRM Rust changes for v7.2-rc1

- Driver Core (shared via signed tag dd-lifetimes-7.2-rc1):

  - Introduce Higher-Ranked Lifetime Types (HRT) for Rust device
    drivers, allowing driver structs to hold device resources like
    pci::Bar and IoMem directly with a lifetime tied to the binding
    scope, removing the need for Devres indirection and ARef<Device>.

  - Replace drvdata() with scoped registration data on the auxiliary
    bus, using the new ForLt trait to thread lifetimes through
    registrations. Remove drvdata() and driver_type.

- DRM:

  - Add GPUVM immediate mode abstraction for Rust GPU drivers:
    - In immediate mode, GPU virtual address space state is updated
      during job execution (in the DMA fence signalling critical path),
      keeping the GPUVM and the GPU's address space always in sync.

    - Provide GpuVm, GpuVa, and GpuVmBo types for managing address
      spaces, virtual mappings, and GEM object backing respectively.

    - Provide split-merge map/unmap operations that handle partial
      overlaps with existing mappings.

    - drm_exec integration for dma_resv locking and GEM object
      validation based on the external/evicted object lists are not
      yet covered and planned as follow-up work.

  - Introduce DeviceContext type state for drm::Device, allowing
    drivers to restrict operations to contexts where the device is
    guaranteed to be registered (or not yet registered) with userspace.

  - Add FEAT_RENDER flag to the Driver trait for render node support.

- Nova:

  - Hopper/Blackwell enablement:
    - Add GPU identification and architecture-based HAL selection for
      Hopper (GH100) and Blackwell (GB100, GB202).

    - Implement the FSP (Foundation Security Processor) boot path used by
      Hopper and Blackwell, including FSP falcon engine support, EMEM
      operations, MCTP/NVDM message infrastructure, and FSP Chain of
      Trust boot with GSP lockdown release.

    - Add support for 32-bit firmware images and auto-detection of
      firmware image format.

    - Add architecture-specific framebuffer, sysmem flush, PCI config
      mirror, DMA mask, and WPR/non-WPR heap sizing.

  - GSP boot and unload:
    - Refactor the GSP boot process into a chipset-specific HAL,
      keeping the SEC2 and FSP boot paths separated cleanly.

    - Implement proper driver unload: send UNLOADING_GUEST_DRIVER
      command, run Booter Unloader and FWSEC-SB upon unbinding, and run
      the unload bundle on Gsp::boot() failure. This removes the need
      for a manual GPU reset between driver unbind and re-probe.

  - GA100 support:
    - Add support for the GA100 GPU, including IFR header detection and
      skipping, correct fwsignature selection, conditional FRTS boot,
      and documentation of the IFR header layout.

  - VBIOS hardening and refactoring:
    - Harden VBIOS parsing with checked arithmetic, bounds-checked
      accesses, and FromBytes-based structure reads throughout the FWSEC
      and Falcon data paths. Simplify the overall VBIOS module
      structure.

  - HRT adoption:
    - Use lifetime-parameterized pci::Bar directly, replacing the
      Arc<Devres<Bar0>> indirection. Replace ARef<Device> with &'bound
      Device in SysmemFlush and the GSP sequencer. Separate the driver
      type from driver data.

  - Misc:
    - Rename module names to kebab-case (nova-drm, nova-core).

    - Require little-endian in Kconfig, making the existing assumption
      explicit.

- Tyr:

  - Define comprehensive typed register blocks for GPU_CONTROL,
    JOB_CONTROL, MMU_CONTROL (including per-address-space registers),
    and DOORBELL_BLOCK using the kernel register!() macro. This replaces
    manual bit manipulation with typed register and field accessors.

  - Add shmem-backed GEM objects and set DMA mask based on GPU physical
    address width.

  - Adopt HRT: separate driver type from driver data, and use IoMem
    directly instead of Devres for register access during probe.

  - Move clock cleanup into a Drop implementation.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: "Danilo Krummrich" <dakr@kernel.org>
Link: https://patch.msgid.link/DJ0IF39U9ETK.PCCUO7ZEQ4S0@kernel.org

2 files changed, 6 insertions, 2 deletions

diff --git a/include/linux/auxiliary_bus.h b/include/linux/auxiliary_bus.h
index bc09b55e3682..4e1ad8ccbcdd 100644
--- a/include/linux/auxiliary_bus.h
+++ b/include/linux/auxiliary_bus.h
@@ -62,6 +62,9 @@
  * @sysfs.irqs: irqs xarray contains irq indices which are used by the device,
  * @sysfs.lock: Synchronize irq sysfs creation,
  * @sysfs.irq_dir_exists: whether "irqs" directory exists,
+ * @registration_data_rust: private data owned by the registering (parent)
+ *                          driver; valid for as long as the device is
+ *                          registered with the driver core,
  *
  * An auxiliary_device represents a part of its parent device's functionality.
  * It is given a name that, combined with the registering drivers
@@ -148,6 +151,7 @@ struct auxiliary_device {
 		struct mutex lock; /* Synchronize irq sysfs creation */
 		bool irq_dir_exists;
 	} sysfs;
+	void *registration_data_rust;
 };
 
 /**
diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h
index bbc67ec513ed..38e9a4679447 100644
--- a/include/linux/device/driver.h
+++ b/include/linux/device/driver.h
@@ -123,8 +123,8 @@ struct device_driver {
 	struct driver_private *p;
 	struct {
 		/*
-		 * Called after remove() and after all devres entries have been
-		 * processed. This is a Rust only callback.
+		 * Called after remove() but before devres entries are released.
+		 * This is a Rust only callback.
 		 */
 		void (*post_unbind_rust)(struct device *dev);
 	} p_cb;