Re: [PATCH 0/8] dma::Coherent & dma::CoherentInit API

From: Andreas Hindborg

Date: Tue Mar 24 2026 - 08:57:31 EST


"Danilo Krummrich" <dakr@xxxxxxxxxx> writes:

> This patch series introduces the dma::Coherent API Gary worked out in the
> context of his I/O projection work.
>
> Additionally, introduce dma::CoherentInit, a type that encapsulates a
> dma::Coherent object before its DMA address is exposed to the device.
> dma::CoherentInit can guarantee exclusive access to the inner dma::Coherent
> object and implement Deref and DerefMut.
>
> Also add Coherent::init() and Coherent::init_with_attrs() so we can directly
> initialize a new dma::Coherent object through an impl Init<T, E>.
>
> Danilo Krummrich (5):
> rust: dma: use "kernel vertical" style for imports
> rust: dma: introduce dma::CoherentInit for memory initialization
> rust: dma: add Coherent:init() and Coherent::init_with_attrs()
> gpu: nova-core: use Coherent::init to initialize GspFwWprMeta
> gpu: nova-core: convert Gsp::new() to use CoherentInit
>
> Gary Guo (3):
> rust: dma: add generalized container for types other than slices
> rust: dma: add zeroed constructor to `Coherent`
> gpu: nova-core: convert to new dma::Coherent API
>
> drivers/gpu/nova-core/dma.rs | 19 +-
> drivers/gpu/nova-core/falcon.rs | 7 +-
> drivers/gpu/nova-core/firmware.rs | 10 +-
> drivers/gpu/nova-core/gsp.rs | 65 ++--
> drivers/gpu/nova-core/gsp/boot.rs | 7 +-
> drivers/gpu/nova-core/gsp/cmdq.rs | 55 +--
> drivers/gpu/nova-core/gsp/fw.rs | 82 ++--
> rust/kernel/device.rs | 4 +-
> rust/kernel/dma.rs | 626 +++++++++++++++++++++++-------
> samples/rust/rust_dma.rs | 8 +-
> 10 files changed, 619 insertions(+), 264 deletions(-)
>
>
> base-commit: 1195fcbda62f12108dc9be56fa4173897905b90c

What did you base this on?


Best regards,
Andreas Hindborg