kernel/linux.git/drivers/gpu/nova-core/nova_core.rs, branch v7.1

gpu: nova-core: firmware: gsp: use dma::Coherent for level0 table

2026-03-28T13:20:08+00:00

Replace the nova-core local `DmaObject` with a `CoherentBox` that can fulfill the same role. Since `CoherentBox` is more flexible than `DmaObject`, we can use the native `u64` type for page table entries instead of messing with bytes. The `dma` module becomes unused with that change, so remove it as well. Reviewed-by: Gary Guo Reviewed-by: Danilo Krummrich Link: https://patch.msgid.link/20260327-b4-nova-dma-removal-v2-7-616e1d0b5cb3@nvidia.com Signed-off-by: Alexandre Courbot

gpu: nova-core: introduce `bounded_enum` macro

2026-03-26T06:08:27+00:00

Introduce a powered-up version of our ad-hoc `impl_from_enum_to_u8` macro that allows the definition of an enum type associated to a `Bounded` of a given width, and provides the `From` and `TryFrom` implementations required to use that enum as a register field member. This allows us to generate the required conversion implementations for using the kernel register macro and skip some tedious boilerplate. Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260325-b4-nova-register-v4-1-bdf172f0f6ca@nvidia.com Signed-off-by: Alexandre Courbot

gpu: nova-core: create debugfs root in module init

2026-03-25T00:24:26+00:00

Create the 'nova_core' root debugfs entry when the driver loads. Normally, non-const global variables need to be protected by a mutex. Instead, we use unsafe code, as we know the entry is never modified after the driver is loaded. This solves the lifetime issue of the mutex guard, which would otherwise have required the use of `pin_init_scope`. Signed-off-by: Timur Tabi Reviewed-by: Gary Guo Reviewed-by: Alexandre Courbot Tested-by: John Hubbard Tested-by: Eliot Courtney Link: https://patch.msgid.link/20260319212658.2541610-6-ttabi@nvidia.com Signed-off-by: Danilo Krummrich

gpu: nova-core: Replace module_pci_driver! with explicit module init

2026-03-25T00:24:26+00:00

Replace the module_pci_driver! macro with an explicit module initialization using the standard module! macro and InPlaceModule trait implementation. No functional change intended, with the exception that the driver now prints a message when loaded. This change is necessary so that we can create a top-level "nova_core" debugfs entry when the driver is loaded. Signed-off-by: Timur Tabi Reviewed-by: Gary Guo Reviewed-by: Alexandre Courbot Tested-by: John Hubbard Tested-by: Eliot Courtney Link: https://patch.msgid.link/20260319212658.2541610-5-ttabi@nvidia.com Signed-off-by: Danilo Krummrich

gpu: nova-core: use core library's CStr instead of kernel one

2026-02-24T23:17:04+00:00

The kernel's own CStr type has been replaced by the one in the core library, and is now an alias to the latter. Change our imports to directly reference the actual type. Reviewed-by: Lyude Paul Reviewed-by: Gary Guo Reviewed-by: Danilo Krummrich Link: https://patch.msgid.link/20260217-nova-misc-v3-7-b4e2d45eafbc@nvidia.com [acourbot@nvidia.com: remove unneeded imports reorganization in firmware/gsp.rs] Signed-off-by: Alexandre Courbot

gpu: nova-core: use CStr::from_bytes_until_nul() and remove util.rs

2026-01-07T18:36:11+00:00

The util.rs module contained a single helper function, str_from_null_terminated(), which duplicated functionality that is now available in core::ffi::CStr. Specifically, CStr::from_bytes_until_nul() is available in the kernel's minimum supported Rust version (1.78.0), so it time to stop using this custom workaround. Reviewed-by: Joel Fernandes Signed-off-by: John Hubbard Link: https://patch.msgid.link/20260106035226.48853-2-jhubbard@nvidia.com Signed-off-by: Danilo Krummrich

gpu: nova-core: gsp: Retrieve GSP static info to gather GPU information

2025-11-15T12:54:18+00:00

After GSP initialization is complete, retrieve the static configuration information from GSP-RM. This information includes GPU name, capabilities, memory configuration, and other properties. On some GPU variants, it is also required to do this for initialization to complete. Signed-off-by: Alistair Popple Co-developed-by: Joel Fernandes Signed-off-by: Joel Fernandes Reviewed-by: Lyude Paul [acourbot@nvidia.com: properly abstract the command's bindings, add relevant methods, make str_from_null_terminated return an Option, fix size of GPU name array.] Co-developed-by: Alexandre Courbot Signed-off-by: Alexandre Courbot Message-ID: <20251114195552.739371-14-joelagnelf@nvidia.com>

gpu: nova-core: Add a slice-buffer (sbuffer) datastructure

2025-11-14T11:25:56+00:00

A data structure that can be used to write across multiple slices which may be out of order in memory. This lets SBuffer user correctly and safely write out of memory order, without error-prone tracking of pointers/offsets. let mut buf1 = [0u8; 3]; let mut buf2 = [0u8; 5]; let mut sbuffer = SBuffer::new([&mut buf1[..], &mut buf2[..]]); let data = b"hello"; let result = sbuffer.write(data); Reviewed-by: Lyude Paul Co-developed-by: Alistair Popple Signed-off-by: Alistair Popple Signed-off-by: Joel Fernandes Co-developed-by: Alexandre Courbot Signed-off-by: Alexandre Courbot Message-ID: <20251110-gsp_boot-v9-6-8ae4058e3c0e@nvidia.com>

gpu: nova-core: add functions and traits for lossless integer conversions

2025-11-07T23:22:36+00:00

The core library's `From` implementations do not cover conversions that are not portable or future-proof. For instance, even though it is safe today, `From` is not implemented for `u64` because of the possibility to support larger-than-64bit architectures in the future. However, the kernel supports a narrower set of architectures, and in the case of Nova we only support 64-bit. This makes it helpful and desirable to provide more infallible conversions, lest we need to rely on the `as` keyword and carry the risk of silently losing data. Thus, introduce a new module `num` that provides safe const functions performing more conversions allowed by the build target, as well as `FromSafeCast` and `IntoSafeCast` traits that are just extensions of `From` and `Into` to conversions that are known to be lossless. Suggested-by: Danilo Krummrich Link: https://lore.kernel.org/rust-for-linux/DDK4KADWJHMG.1FUPL3SDR26XF@kernel.org/ Acked-by: Danilo Krummrich [acourbot@nvidia.com: fix merge conflicts after rebase.] Signed-off-by: Alexandre Courbot Message-ID: <20251029-nova-as-v3-4-6a30c7333ad9@nvidia.com>

gpu: nova-core: replace wait_on with kernel equivalents

2025-10-25T04:14:21+00:00

wait_on was a temporary helper function waiting for a kernel crate equivalent. Now that read_poll_timeout and fsleep are available, use them and remove wait_on. Acked-by: Danilo Krummrich Signed-off-by: Alexandre Courbot Message-ID: <20251020-nova_wait_on-v1-1-2eb87fb38d14@nvidia.com>