linux-kernel - Re: [PATCH v3 0/3] Rust scatterlist abstractions

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Message-ID: <2023061001-immovable-mongoose-7546@gregkh>
Date:   Sat, 10 Jun 2023 17:35:22 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Qingsong Chen <changxian.cqs@...group.com>
Cc:     linux-kernel@...r.kernel.org,
        田洪亮 <tate.thl@...group.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        rust-for-linux@...r.kernel.org
Subject: Re: [PATCH v3 0/3] Rust scatterlist abstractions

On Sat, Jun 10, 2023 at 05:33:47PM +0200, Greg KH wrote:
> On Sat, Jun 10, 2023 at 06:49:06PM +0800, Qingsong Chen wrote:
> > Hi All!
> > 
> > This is a version of scatterlist abstractions for Rust drivers.
> > 
> > Scatterlist is used for efficient management of memory buffers, which is
> > essential for many kernel-level operations such as Direct Memory Access
> > (DMA) transfers and crypto APIs.
> > 
> > This patch should be a good start to introduce the crypto APIs for Rust
> > drivers and to develop cipher algorithms in Rust later.
> 
> I thought we were getting rid of the scatter list api for the crypto
> drivers, so this shouldn't be needed going forward, right?  Why not just
> use the direct apis instead?

See https://lore.kernel.org/r/ZH2hgrV6po9dkxi+@gondor.apana.org.au for
the details of that (sorry I forgot the link first time...)

greg k-h