[RFC PATCH 0/3] new subsystem for compute accelerator devices
Greg Kroah-Hartman
gregkh at linuxfoundation.org
Mon Oct 24 12:35:54 UTC 2022
On Mon, Oct 24, 2022 at 01:55:56PM +0200, Thomas Zimmermann wrote:
> Hi
>
> Am 22.10.22 um 23:46 schrieb Oded Gabbay:
> > In the last couple of months we had a discussion [1] about creating a new
> > subsystem for compute accelerator devices in the kernel.
> >
> > After an analysis that was done by DRM maintainers and myself, and following
> > a BOF session at the Linux Plumbers conference a few weeks ago [2], we
> > decided to create a new subsystem that will use the DRM subsystem's code and
> > functionality. i.e. the accel core code will be part of the DRM subsystem.
> >
> > This will allow us to leverage the extensive DRM code-base and
> > collaborate with DRM developers that have experience with this type of
> > devices. In addition, new features that will be added for the accelerator
> > drivers can be of use to GPU drivers as well (e.g. RAS).
> >
> > As agreed in the BOF session, the accelerator devices will be exposed to
> > user-space with a new, dedicated device char files and a dedicated major
> > number (261), to clearly separate them from graphic cards and the graphic
> > user-space s/w stack. Furthermore, the drivers will be located in a separate
> > place in the kernel tree (drivers/accel/).
> >
> > This series of patches is the first step in this direction as it adds the
> > necessary infrastructure for accelerator devices to DRM. The new devices will
> > be exposed with the following convention:
> >
> > device char files - /dev/accel/accel*
> > sysfs - /sys/class/accel/accel*/
> > debugfs - /sys/kernel/debug/accel/accel*/
>
> I know I'm really late to this discussion, but wouldn't 'compute' be a
> better name?
>
> (I agree that skynet would also be nice :)
See the summary of the meeting we all held at the Plumbers conference
about this. "accel" was the "least hated" of all of the options, so I
think we'll stick with that for now.
thanks,
greg k-h
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