Re: Habanalabs Open-Source TPC LLVM compiler and SynapseAI Core library

From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	dri-devel <dri-devel@lists.freedesktop.org>
Cc: Oded Gabbay <ogabbay@kernel.org>,
	mzuckerman@habana.ai, dsinger@habana.ai,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Dave Airlie <airlied@gmail.com>, Jason Gunthorpe <jgg@ziepe.ca>,
	"Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>
Subject: Re: Habanalabs Open-Source TPC LLVM compiler and SynapseAI Core library
Date: Fri, 10 Sep 2021 18:10:27 +0200	[thread overview]
Message-ID: <CAKMK7uFj-m4y+N-q8uoNasJuksgDj-oRK3K=SjoyKMQL=QCENw@mail.gmail.com> (raw)
In-Reply-To: <CAKMK7uFLBmdHphtnEa1nyAGUHdcP1KgmaK+vtV_GOU6wZZAOxg@mail.gmail.com>

Forgot to add dri-devel.

On Fri, Sep 10, 2021 at 6:09 PM Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
>
> On Fri, Sep 10, 2021 at 9:58 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> > On Fri, Sep 10, 2021 at 10:26:56AM +0300, Oded Gabbay wrote:
> > > Hi Greg,
> > >
> > > Following our conversations a couple of months ago, I'm happy to tell you that
> > > Habanalabs has open-sourced its TPC (Tensor Processing Core) LLVM compiler,
> > > which is a fork of the LLVM open-source project.
> > >
> > > The project can be found on Habanalabs GitHub website at:
> > > https://github.com/HabanaAI/tpc_llvm
> > >
> > > There is a companion guide on how to write TPC kernels at:
> > > https://docs.habana.ai/en/latest/TPC_User_Guide/TPC_User_Guide.html
> >
> > That's great news, thanks for pushing for this and releasing it all!
>
> Yeah this is neat.
>
> There's still the problem that we spent the past 2.5 years pissing off
> a lot of people for an imo questionable political project, bypassing
> all the technical review and expertise. Now that the political
> nonsense is resolved I think we need to look at at least the technical
> cleanup. The angered people are much harder to fix, so let's maybe
> ignore that (or perhaps a ks topic, no idea, I'm honestly not super
> motivated to rehash this entire story again). Here's what I think we
> should do:
>
> - move drivers/misc/habanalabs under drivers/gpu/habanalabs and
> review/discussions on dri-devel
> - grandfather the entire current situation in as-is, it's not the only
> driver we have with a funny uapi of its own (but the other driver did
> manage to get their compiler into upstream llvm even, and not like 2
> years late)
> - review the dma-buf stuff on dri-devel and then land it through
> standard flows, not the gregk-misc bypass
> - close drivers/misc backdoor for further accel driver submissions,
> I'd like to focus on technical stuff in this area going forward and
> not pointless exercises in bypassing due process and all that
>
> I expect we'll have a proper discussion what the stack should look
> like with the next submission (from a different vendor maybe), that
> ship kinda sailed with habanalabs.
>
> Cheers, Daniel
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch