kernel/linux.git/drivers/gpu/nova-core/falcon/hal, branch v7.2-rc1

gpu: nova-core: move lifetime to `Bar0`

2026-06-03T20:10:51+00:00

Currently Nova code uses `&'a Bar0` a lot. This is `&'a Mmio`, where `Mmio` represents an owned MMIO region; this type only exists as a target for `Deref` so `Bar` and `IoMem` can share code and should be avoided to be named directly. The upcoming I/O projection series would make `Io` trait much simpler to implement, and thus the owned MMIO type would be removed in favour of direct `Io` implementation on `Bar` and `IoMem`. Add lifetime parameter to `Bar0<'a>` and change it to be alias of `&'a pci::Bar<'a, ..>`. This also prepares Nova core so that when I/O projection series land, this could be changed to using a MMIO view type directly which avoids double indirection. Signed-off-by: Gary Guo Acked-by: Alexandre Courbot Reviewed-by: Eliot Courtney Link: https://patch.msgid.link/20260602170416.2268531-1-gary@kernel.org [ Rebase onto latest drm-rust-next (Blackwell enablement). - Danilo ] Signed-off-by: Danilo Krummrich

gpu: nova-core: program_brom cannot fail

2026-04-28T23:13:55+00:00

Change the signature of the program_brom HAL method to not return anything. None of the implementations can actually fail, so they always return Ok(()). Signed-off-by: Timur Tabi Link: https://patch.msgid.link/20260205225922.2158430-1-ttabi@nvidia.com [acourbot: fix conflicts when applying.] Signed-off-by: Alexandre Courbot

gpu: nova-core: convert falcon registers to kernel register macro

2026-03-26T06:09:44+00:00

Convert all PFALCON, PFALCON2 and PRISCV registers to use the kernel's register macro and update the code accordingly. Because they rely on the same types to implement relative registers, they need to be updated in lockstep. nova-core's local register macro is now unused, so remove it. Reviewed-by: Gary Guo Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260325-b4-nova-register-v4-8-bdf172f0f6ca@nvidia.com [acourbot@nvidia.com: remove unused import.] Signed-off-by: Alexandre Courbot

gpu: nova-core: convert FUSE registers to kernel register macro

2026-03-26T06:08:28+00:00

Convert all FUSE registers to use the kernel's register macro and update the code accordingly. Reviewed-by: Eliot Courtney Reviewed-by: Gary Guo Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260325-b4-nova-register-v4-6-bdf172f0f6ca@nvidia.com Signed-off-by: Alexandre Courbot

gpu: nova-core: add Falcon HAL method load_method()

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

Some GPUs do not support using DMA to transfer code/data from system memory to Falcon memory, and instead must use programmed I/O (PIO). Add a function to the Falcon HAL to indicate whether a given GPU's Falcons support DMA for this purpose. Signed-off-by: Timur Tabi Reviewed-by: Gary Guo Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260122222848.2555890-10-ttabi@nvidia.com [acourbot@nvidia.com: add short code to call into the HAL.] [acourbot@nvidia.com: make `dma_load` private as per feedback.] Signed-off-by: Alexandre Courbot

gpu: nova-core: add NV_PFALCON_FALCON_ENGINE::reset_engine()

2026-01-23T23:45:13+00:00

Add a method for the NV_PFALCON_FALCON_ENGINE register that reset the Falcon, and update the reset_eng() HAL functions to use it. Signed-off-by: Timur Tabi Reviewed-by: Gary Guo Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260122222848.2555890-9-ttabi@nvidia.com Signed-off-by: Alexandre Courbot

gpu: nova-core: Add basic Turing HAL

2026-01-23T23:45:13+00:00

Add the basic HAL for recognizing Turing GPUs. This isn't enough to support booting GSP-RM on Turing, but it's a start. Note that GA100, which boots using the same method as Turing, is not supported yet. Signed-off-by: Timur Tabi Reviewed-by: John Hubbard Reviewed-by: Gary Guo Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260122222848.2555890-8-ttabi@nvidia.com Signed-off-by: Alexandre Courbot

gpu: nova-core: move some functions into the HAL

2026-01-23T23:45:13+00:00

A few Falcon methods are actually GPU-specific, so move them into the HAL. Signed-off-by: Timur Tabi Reviewed-by: John Hubbard Reviewed-by: Gary Guo Acked-by: Danilo Krummrich Link: https://patch.msgid.link/20260122222848.2555890-7-ttabi@nvidia.com Signed-off-by: Alexandre Courbot

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: 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>