Re: [PATCH v4 0/2] Add p2p via dmabuf to habanalabs

Christoph Hellwig
2021-07-06T12:28:42Z

On Tue, Jul 06, 2021 at 10:40:37AM +0200, Daniel Vetter wrote:
> > Greg, I hope this will be good enough for you to merge this code.
>
> So we're officially going to use dri-devel for technical details review
> and then Greg for merging so we don't have to deal with other merge
> criteria dri-devel folks have?
>
> I don't expect anything less by now, but it does make the original claim
> that drivers/misc will not step all over accelerators folks a complete
> farce under the totally-not-a-gpu banner.
>
> This essentially means that for any other accelerator stack that doesn't
> fit the dri-devel merge criteria, even if it's acting like a gpu and uses
> other gpu driver stuff, you can just send it to Greg and it's good to go.
>
> There's quite a lot of these floating around actually (and many do have
> semi-open runtimes, like habanalabs have now too, just not open enough to
> be actually useful). It's going to be absolutely lovely having to explain
> to these companies in background chats why habanalabs gets away with their
> stack and they don't.

FYI, I fully agree with Daniel here. Habanlabs needs to open up their
runtime if they want to push any additional feature in the kernel.
The current situation is not sustainable.