kernel/linux.git/drivers/gpu/nova-core/vbios.rs, branch v7.0-rc7

Merge tag 'driver-core-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

2026-02-12T01:43:59+00:00

Pull driver core updates from Danilo Krummrich: "Bus: - Ensure bus->match() is consistently called with the device lock held - Improve type safety of bus_find_device_by_acpi_dev() Devtmpfs: - Parse 'devtmpfs.mount=' boot parameter with kstrtoint() instead of simple_strtoul() - Avoid sparse warning by making devtmpfs_context_ops static IOMMU: - Do not register the qcom_smmu_tbu_driver in arm_smmu_device_probe() MAINTAINERS: - Add the new driver-core mailing list (driver-core@lists.linux.dev) to all relevant entries - Add missing tree location for "FIRMWARE LOADER (request_firmware)" - Add driver-model documentation to the "DRIVER CORE" entry - Add missing driver-core maintainers to the "AUXILIARY BUS" entry Misc: - Change return type of attribute_container_register() to void; it has always been infallible - Do not export sysfs_change_owner(), sysfs_file_change_owner() and device_change_owner() - Move devres_for_each_res() from the public devres header to drivers/base/base.h - Do not use a static struct device for the faux bus; allocate it dynamically Revocable: - Patches for the revocable synchronization primitive have been scheduled for v7.0-rc1, but have been reverted as they need some more refinement Rust: - Device: - Support dev_printk on all device types, not just the core Device struct; remove now-redundant .as_ref() calls in dev_* print calls - Devres: - Introduce an internal reference count in Devres to avoid a deadlock condition in case of (indirect) nesting - DMA: - Allow drivers to tune the maximum DMA segment size via dma_set_max_seg_size() - I/O: - Introduce the concept of generic I/O backends to handle different kinds of device shared memory through a common interface. This enables higher-level concepts such as register abstractions, I/O slices, and field projections to be built generically on top. In a first step, introduce the Io, IoCapable, and IoKnownSize trait hierarchy for sharing a common interface supporting offset validation and bound-checking logic between I/O backends. - Refactor MMIO to use the common I/O backend infrastructure - Misc: - Add __rust_helper annotations to C helpers for inlining into Rust code - Use "kernel vertical" style for imports - Replace kernel::c_str! with C string literals - Update ARef imports to use sync::aref - Use pin_init::zeroed() for struct auxiliary_device_id and debugfs file_operations initialization - Use LKMM atomic types in debugfs doc-tests - Various minor comment and documentation fixes - PCI: - Implement PCI configuration space accessors using the common I/O backend infrastructure - Document pci::Bar device endianness assumptions - SoC: - Abstractions for struct soc_device and struct soc_device_attribute - Sample driver for soc::Device" * tag 'driver-core-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (79 commits) rust: devres: fix race condition due to nesting rust: dma: add missing __rust_helper annotations samples: rust: pci: Remove some additional `.as_ref()` for `dev_*` print Revert "revocable: Revocable resource management" Revert "revocable: Add Kunit test cases" Revert "selftests: revocable: Add kselftest cases" driver core: remove device_change_owner() export sysfs: remove exports of sysfs_*change_owner() driver core: disable revocable code from build revocable: Add KUnit test for concurrent access revocable: fix SRCU index corruption by requiring caller-provided storage revocable: Add KUnit test for provider lifetime races revocable: Fix races in revocable_alloc() using RCU driver core: fix inverted "locked" suffix of driver_match_device() rust: io: move MIN_SIZE and io_addr_assert to IoKnownSize rust: pci: re-export ConfigSpace rust: dma: allow drivers to tune max segment size gpu: tyr: remove redundant `.as_ref()` for `dev_*` print rust: auxiliary: use `pin_init::zeroed()` for device ID rust: debugfs: use pin_init::zeroed() for file_operations ...

gpu: nova-core: add FalconUCodeDescV2 support

2026-01-24T01:48:59+00:00

The FRTS firmware in Turing and GA100 VBIOS has an older header format (v2 instead of v3). To support both v2 and v3 at runtime, add the FalconUCodeDescV2 struct, and update code that references the FalconUCodeDescV3 directly with a FalconUCodeDesc enum that encapsulates both. Signed-off-by: Timur Tabi Reviewed-by: Joel Fernandes Reviewed-by: Gary Guo Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260122222848.2555890-11-ttabi@nvidia.com Signed-off-by: Alexandre Courbot

rust: io: separate generic I/O helpers from MMIO implementation

2026-01-23T20:20:11+00:00

The previous Io type combined both the generic I/O access helpers and MMIO implementation details in a single struct. This coupling prevented reusing the I/O helpers for other backends, such as PCI configuration space. Establish a clean separation between the I/O interface and concrete backends by separating generic I/O helpers from MMIO implementation. Introduce a new trait hierarchy to handle different access capabilities: - IoCapable: A marker trait indicating that a backend supports I/O operations of a certain type (u8, u16, u32, or u64). - Io trait: Defines fallible (try_read8, try_write8, etc.) and infallibile (read8, write8, etc.) I/O methods with runtime bounds checking and compile-time bounds checking. - IoKnownSize trait: The marker trait for types support infallible I/O methods. Move the MMIO-specific logic into a dedicated Mmio type that implements the Io traits. Rename IoRaw to MmioRaw and update consumers to use the new types. Cc: Alexandre Courbot Cc: Alice Ryhl Cc: Bjorn Helgaas Cc: Gary Guo Cc: Danilo Krummrich Cc: John Hubbard Signed-off-by: Zhi Wang Reviewed-by: Alice Ryhl Reviewed-by: Alexandre Courbot Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260121202212.4438-3-zhiw@nvidia.com [ Add #[expect(unused)] to define_{read,write}!(). - Danilo ] Signed-off-by: Danilo Krummrich

gpu: nova-core: add missing newlines to several print strings

2026-01-12T13:44:06+00:00

Although the dev_xx!() macro calls do not technically require terminating newlines for the format strings, they should be added anyway to maintain consistency, both within Rust code and with the C versions. Signed-off-by: Timur Tabi Reviewed-by: John Hubbard Link: https://patch.msgid.link/20260107201647.2490140-2-ttabi@nvidia.com Signed-off-by: Danilo Krummrich

gpu: nova-core: don't print raw PMU table entries

2026-01-12T13:11:04+00:00

Remove the (large) raw form of the PMU table entries. The resulting PMULookupTable is still getting printed (in more useful form) later, anyway, so this was redundant, even for debugging. This output (the example is from an Ampere GPU) is what is being removed: NovaCore 0000:e1:00.0: PMU entry: [01, 01, 54, 54, 01, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [07, 06, e0, b7, 03, 00] NovaCore 0000:e1:00.0: PMU entry: [08, 01, bc, 56, 05, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [45, 07, 88, da, 01, 00] NovaCore 0000:e1:00.0: PMU entry: [85, 07, 34, c9, 02, 00] NovaCore 0000:e1:00.0: PMU entry: [49, 05, 7c, b3, 04, 00] NovaCore 0000:e1:00.0: PMU entry: [89, 05, 1c, 05, 05, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] NovaCore 0000:e1:00.0: PMU entry: [00, 00, 00, 00, 00, 00] And it is immediately followed by a more useful, interpreted list of selected PMU table data, which is *not* being removed as part of this commit. That looks like this: NovaCore 0000:e1:00.0: PmuLookupTableEntry desc: FalconUCodeDescV3 { hdr: 78381825, stored_size: 59904, pkc_data_offset: 1444, interface_offset: 28, imem_phys_base: 0, imem_load_size: 57856, imem_virt_base: 0, dmem_phys_base: 0, dmem_load_size: 2048, engine_id_mask: 1024, ucode_id: 9, signature_count: 3, signature_versions: 7, _reserved: 37449, } Signed-off-by: John Hubbard Acked-by: Joel Fernandes Link: https://patch.msgid.link/20260108005811.86014-3-jhubbard@nvidia.com Signed-off-by: Danilo Krummrich

drivers: gpu: Update ARef imports from sync::aref

2025-12-18T07:51:07+00:00

Update call sites to import `ARef` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to sync. Suggested-by: Benno Lossin Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand Reviewed-by: Joel Fernandes Acked-by: Alexandre Courbot Link: https://patch.msgid.link/20251123092438.182251-3-shankari.ak0208@gmail.com [aliceryhl: keep trailing // at last import] Signed-off-by: Alice Ryhl

gpu: nova-core: replace use of `as` with functions from `num`

2025-11-07T23:22:45+00:00

Use the newly-introduced `num` module to replace the use of `as` wherever it is safe to do. This ensures that a given conversion cannot lose data if its source or destination type ever changes. Acked-by: Danilo Krummrich [acourbot@nvidia.com: fix merge conflicts after rebase.] Signed-off-by: Alexandre Courbot Message-ID: <20251029-nova-as-v3-5-6a30c7333ad9@nvidia.com>

gpu: nova-core: apply the one "use" item per line policy

2025-11-07T14:10:44+00:00

As per [1], we need one "use" item per line, in order to reduce merge conflicts. Furthermore, we need a trailing ", //" in order to tell rustfmt(1) to leave it alone. This does that for the entire nova-core driver. [1] https://docs.kernel.org/rust/coding-guidelines.html#imports Acked-by: Danilo Krummrich Signed-off-by: John Hubbard [acourbot@nvidia.com: remove imports already in prelude as pointed out by Danilo.] [acourbot@nvidia.com: remove a few unneeded trailing `//`.] Signed-off-by: Alexandre Courbot Message-ID: <20251107021006.434109-1-jhubbard@nvidia.com>

gpu: nova-core: vbios: use FromBytes for NpdeStruct

2025-11-05T11:29:47+00:00

Use `from_bytes_copy_prefix` to create `NpdeStruct` instead of building it ourselves from the bytes stream. This lets us remove a few array accesses and results in shorter code. Reviewed-by: Joel Fernandes Signed-off-by: Alexandre Courbot Message-ID: <20251029-nova-vbios-frombytes-v1-5-ac441ebc1de3@nvidia.com>

gpu: nova-core: vbios: use FromBytes for BitHeader

2025-11-05T11:29:47+00:00

Use `from_bytes_copy_prefix` to create `BitHeader` instead of building it ourselves from the bytes stream. This lets us remove a few array accesses and results in shorter code. Reviewed-by: Joel Fernandes Signed-off-by: Alexandre Courbot Message-ID: <20251029-nova-vbios-frombytes-v1-4-ac441ebc1de3@nvidia.com>