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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> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Tested-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Reviewed-by: Melissa Wen <mwen@igalia.com>
24 lines
980 B
Text
24 lines
980 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Compute Acceleration device configuration
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#
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# This framework provides support for compute acceleration devices, such
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# as, but not limited to, Machine-Learning and Deep-Learning acceleration
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# devices
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#
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menuconfig DRM_ACCEL
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bool "Compute Acceleration Framework"
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depends on DRM
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help
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Framework for device drivers of compute acceleration devices, such
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as, but not limited to, Machine-Learning and Deep-Learning
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acceleration devices.
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If you say Y here, you need to select the module that's right for
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your acceleration device from the list below.
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This framework is integrated with the DRM subsystem as compute
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accelerators and GPUs share a lot in common and can use almost the
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same infrastructure code.
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Having said that, acceleration devices will have a different
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major number than GPUs, and will be exposed to user-space using
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different device files, called accel/accel* (in /dev, sysfs
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and debugfs).
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