From: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
To: Oded Gabbay <ogabbay@kernel.org>
Cc: David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
Jason Gunthorpe <jgg@nvidia.com>,
John Hubbard <jhubbard@nvidia.com>,
Alex Deucher <alexander.deucher@amd.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>,
Jiho Chu <jiho.chu@samsung.com>,
Daniel Stone <daniel@fooishbar.org>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
Jeffrey Hugo <quic_jhugo@quicinc.com>,
Christoph Hellwig <hch@infradead.org>,
Kevin Hilman <khilman@baylibre.com>,
Jagan Teki <jagan@amarulasolutions.com>,
Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>,
Maciej Kwapulinski <maciej.kwapulinski@linux.intel.com>,
Randy Dunlap <rdunlap@infradead.org>
Subject: Re: [RFC PATCH v3 1/3] drivers/accel: define kconfig and register a new major
Date: Tue, 8 Nov 2022 13:46:14 +0100 [thread overview]
Message-ID: <20221108124614.GA6397@linux.intel.com> (raw)
In-Reply-To: <20221106210225.2065371-2-ogabbay@kernel.org>
On Sun, Nov 06, 2022 at 11:02:23PM +0200, Oded Gabbay wrote:
> Add a new Kconfig for the accel subsystem. The Kconfig currently
> contains only the basic CONFIG_DRM_ACCEL option that will be used to
> decide whether to compile the accel registration code. Therefore, the
> kconfig option is defined as bool.
>
> The accel code will be compiled as part of drm.ko and will be called
> directly from the DRM core code. The reason we compile it as part of
> drm.ko and not as a separate module is because of cyclic dependency
> between drm.ko and the separate module (if it would have existed).
> This is due to the fact that DRM core code calls accel functions and
> vice-versa.
>
> The accelerator devices will be exposed to the user space with a new,
> dedicated major number - 261.
>
> The accel init function registers the new major number as a char device
> and create corresponding sysfs and debugfs root entries, similar to
> what is done in DRM init function.
>
> I added a new header called drm_accel.h to include/drm/, that will hold
> the prototypes of the drm_accel.c functions. In case CONFIG_DRM_ACCEL
> is set to 'N', that header will contain empty inline implementations of
> those functions, to allow DRM core code to compile successfully
> without dependency on CONFIG_DRM_ACCEL.
>
> I Updated the MAINTAINERS file accordingly with the newly added folder
> and I have taken the liberty to appropriate the dri-devel mailing list
> and the dri-devel IRC channel for the accel subsystem.
>
> Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Tested-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
I tested those patches with intel_vpu driver. After initial troubles,
I got things worked with our driver and user mode components.
Regards
Stanislaw
next prev parent reply other threads:[~2022-11-08 12:46 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-06 21:02 [RFC PATCH v3 0/3] new subsystem for compute accelerator devices Oded Gabbay
2022-11-06 21:02 ` [RFC PATCH v3 1/3] drivers/accel: define kconfig and register a new major Oded Gabbay
2022-11-07 16:12 ` Jeffrey Hugo
2022-11-07 21:05 ` Oded Gabbay
2022-11-08 12:46 ` Stanislaw Gruszka [this message]
2022-11-08 12:48 ` Oded Gabbay
2022-11-06 21:02 ` [RFC PATCH v3 2/3] accel: add dedicated minor for accelerator devices Oded Gabbay
2022-11-07 16:20 ` Jeffrey Hugo
2022-11-07 21:06 ` Oded Gabbay
2022-11-08 13:13 ` Tvrtko Ursulin
2022-11-08 16:14 ` Oded Gabbay
2022-11-06 21:02 ` [RFC PATCH v3 3/3] drm: initialize accel framework Oded Gabbay
2022-11-07 16:24 ` Jeffrey Hugo
2022-11-07 21:04 ` Oded Gabbay
2022-11-07 16:07 ` [RFC PATCH v3 0/3] new subsystem for compute accelerator devices Jeffrey Hugo
2022-11-07 16:21 ` Matthew Wilcox
2022-11-07 16:20 ` Jason Gunthorpe
2022-11-11 22:03 ` Christopher Friedt
2022-11-13 15:05 ` Oded Gabbay
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