linux-kernel - Re: [PATCH v4 0/4] new subsystem for compute accelerator devices

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Date:   Mon, 21 Nov 2022 15:06:44 -0800
From:   Sonal Santan <sonal.santan@....com>
To:     Oded Gabbay <ogabbay@...nel.org>
Cc:     Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Jacek Lawrynowicz <jacek.lawrynowicz@...ux.intel.com>,
        Jeffrey Hugo <quic_jhugo@...cinc.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Arnd Bergmann <arnd@...db.de>, Jiho Chu <jiho.chu@...sung.com>,
        John Hubbard <jhubbard@...dia.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Christoph Hellwig <hch@...radead.org>,
        Christopher Friedt <chrisfriedt@...il.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Kevin Hilman <khilman@...libre.com>,
        Alex Deucher <alexander.deucher@....com>,
        Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>,
        Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>
Subject: Re: [PATCH v4 0/4] new subsystem for compute accelerator devices

On 11/19/22 12:44, Oded Gabbay wrote:
> This is the fourth (and hopefully last) version of the patch-set to add the
> new subsystem for compute accelerators. I removed the RFC headline as
> I believe it is now ready for merging.
> 
> Compare to v3, this patch-set contains one additional patch that adds
> documentation regarding the accel subsystem. I hope it's good enough for
> this stage. In addition, there were few very minor fixes according to
> comments received on v3.
> 
> The patches are in the following repo:
> https://git.kernel.org/pub/scm/linux/kernel/git/ogabbay/accel.git/log/?h=accel_v4
> 
> As in v3, The HEAD of that branch is a commit adding a dummy driver that
> registers an accel device using the new framework. This can be served
> as a simple reference.
> 
> v1 cover letter:
> https://lkml.org/lkml/2022/10/22/544
> 
> v2 cover letter:
> https://lore.kernel.org/lkml/20221102203405.1797491-1-ogabbay@kernel.org/T/
> 
> v3 cover letter:
> https://lore.kernel.org/lkml/20221106210225.2065371-1-ogabbay@kernel.org/T/

Thanks for defining the new accel subsystem. We are currently working on
DRM based drivers for unannounced acceleration devices. I am fine with
these changes with the assumption that the choice of using classic DRM
or accel is left up to the individual driver.

-Sonal

> 
> Thanks,
> Oded.
> 
> Oded Gabbay (4):
>   drivers/accel: define kconfig and register a new major
>   accel: add dedicated minor for accelerator devices
>   drm: initialize accel framework
>   doc: add documentation for accel subsystem
> 
>  Documentation/accel/index.rst         |  17 ++
>  Documentation/accel/introduction.rst  | 109 +++++++++
>  Documentation/admin-guide/devices.txt |   5 +
>  Documentation/subsystem-apis.rst      |   1 +
>  MAINTAINERS                           |   9 +
>  drivers/Kconfig                       |   2 +
>  drivers/accel/Kconfig                 |  24 ++
>  drivers/accel/drm_accel.c             | 323 ++++++++++++++++++++++++++
>  drivers/gpu/drm/Makefile              |   1 +
>  drivers/gpu/drm/drm_drv.c             | 102 +++++---
>  drivers/gpu/drm/drm_file.c            |   2 +-
>  drivers/gpu/drm/drm_sysfs.c           |  24 +-
>  include/drm/drm_accel.h               |  97 ++++++++
>  include/drm/drm_device.h              |   3 +
>  include/drm/drm_drv.h                 |   8 +
>  include/drm/drm_file.h                |  21 +-
>  16 files changed, 711 insertions(+), 37 deletions(-)
>  create mode 100644 Documentation/accel/index.rst
>  create mode 100644 Documentation/accel/introduction.rst
>  create mode 100644 drivers/accel/Kconfig
>  create mode 100644 drivers/accel/drm_accel.c
>  create mode 100644 include/drm/drm_accel.h
> 
> --
> 2.25.1
>