linux-kernel - Re: [PATCH 2/2] rust: add dma coherent allocator abstraction.

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Message-ID: <4387755c-896f-4fd7-be2f-2f54c5b074bd@gmail.com>
Date: Mon, 28 Oct 2024 09:51:55 +0200
From: Abdiel Janulgue <abdiel.janulgue@...il.com>
To: rust-for-linux@...r.kernel.org
Cc: a.hindborg@...nel.org, linux-kernel@...r.kernel.org, dakr@...hat.com,
 airlied@...hat.com, miguel.ojeda.sandonis@...il.com, wedsonaf@...il.com,
 Andreas Hindborg <a.hindborg@...sung.com>
Subject: Re: [PATCH 2/2] rust: add dma coherent allocator abstraction.

On 23/10/2024 14:32, Abdiel Janulgue wrote:
> Add a simple dma coherent allocator rust abstraction which was based on
> Andreas Hindborg's dma abstractions from the rnvme driver.
> 
> This version:
> - Does not introduce the unused dma pool functionality for now.
> - Represents the internal CPU buffer as a slice instead of using raw
>    pointer reads and writes.
> - Ensures both 32 and 64-bit DMA addressing works.
> - Make use of Result error-handling instead of Some.

Ping! Does this approach make sense? :)

> 
> Co-developed-by: Wedson Almeida Filho <wedsonaf@...il.com>
> Signed-off-by: Wedson Almeida Filho <wedsonaf@...il.com>
> Co-developed-by: Andreas Hindborg <a.hindborg@...sung.com>
> Signed-off-by: Andreas Hindborg <a.hindborg@...sung.com>
> Signed-off-by: Abdiel Janulgue <abdiel.janulgue@...il.com>
> ---
>   rust/kernel/dma.rs | 153 +++++++++++++++++++++++++++++++++++++++++++++
>   rust/kernel/lib.rs |   1 +
>   2 files changed, 154 insertions(+)
>   create mode 100644 rust/kernel/dma.rs
>