Re: [PATCH v8 2/2] rust: add dma coherent allocator abstraction.

Danilo Krummrich
2025-01-10T10:41:54Z

On Fri, Jan 10, 2025 at 09:39:55AM +0100, Christoph Hellwig wrote:
> On Thu, Jan 09, 2025 at 09:49:47AM +0100, Danilo Krummrich wrote:
> > On Thu, Jan 09, 2025 at 09:08:12AM +0100, Christoph Hellwig wrote:
> > > On Wed, Jan 08, 2025 at 04:21:33PM +0100, Danilo Krummrich wrote:
> > > > What does "your code" mean? Duplicated in every driver?
> > >
> > > Yes, interfaces to the DMA API should stay in readable C code and not
> > > in weird bindings so that it reminds greppable and maintainable.
> > >
> >
> > Rust drivers shouldn't use C APIs directly, but rather use an abstraction of the
> > corresponding C API.
>
> Don't force me to deal with your shiny language of the day.

Again, no one asks you to deal with or maintain this piece of Rust code.

> Maintaining
> multi-language projects is a pain I have no interest in dealing with.
> If you want to use something that's not C, be that assembly or rust you
> write to C interfaces and deal with the impedence mismatch yourself as
> far as I'm concerned.
>

This is exactly what we're doing and proposing here, isn't it?

We wrote a single piece of Rust code that abstracts the C API for all Rust
drivers, which we offer to maintain ourselves.

What else are you asking for?