[PATCH v4 0/2] Add p2p via dmabuf to habanalabs
jgg at ziepe.ca
Tue Jul 6 14:23:57 UTC 2021
On Tue, Jul 06, 2021 at 12:36:51PM +0200, Daniel Vetter wrote:
> If that means AI companies don't want to open our their hw specs
> enough to allow that, so be it - all you get in that case is
> offloading the kernel side of the stack for convenience, with zero
> long term prospects to ever make this into a cross vendor subsystem
> stack that does something useful.
I don't think this is true at all - nouveau is probably the best
nouveau reverse engineered a userspace stack for one of these devices.
How much further ahead would they have been by now if they had a
vendor supported, fully featured, open kernel driver to build the
> open up your hw enough for that, I really don't see the point in
> merging such a driver, it'll be an unmaintainable stack by anyone else
> who's not having access to those NDA covered specs and patents and
My perspective from RDMA is that the drivers are black boxes. I can
hack around the interface layers but there is a lot of wild stuff in
there that can't be understood without access to the HW documentation.
I think only HW that has open specs, like say NVMe, can really be
properly community oriented. Otherwise we have to work in a community
partnership with the vendor.
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