linux-kernel - Re: [PATCH v5 08/24] amdkfd: Add amdkfd skeleton driver

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Date:	Fri, 21 Nov 2014 11:24:05 +0100
From:	Paul Bolle <pebolle@...cali.nl>
To:	Oded Gabbay <oded.gabbay@....com>
Cc:	David Airlie <airlied@...ux.ie>,
	Alex Deucher <alexander.deucher@....com>,
	Jerome Glisse <j.glisse@...il.com>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	John Bridgman <John.Bridgman@....com>,
	Ben Goz <ben.goz@....com>, Jay Cornwall <jay.cornwall@....com>,
	Evgeny Pinchuk <evgeny.pinchuk@....com>,
	Andrew Lewycky <Andrew.Lewycky@....com>,
	Alexey Skidanov <Alexey.Skidanov@....com>
Subject: Re: [PATCH v5 08/24] amdkfd: Add amdkfd skeleton driver

On Sat, 2014-11-08 at 20:37 +0200, Oded Gabbay wrote:
> This patch adds the amdkfd skeleton driver. The driver does nothing except
> define a /dev/kfd device.
> 
> It returns -ENODEV on all amdkfd IOCTLs.
> 
> v3: Move bool field to the end of structure, removed the pmc ioctls and added
> a meaningful error message for ioctl error.
> 
> v5:
> 
> Create a new folder drm/amd and move amdkfd from drm/radeon/ to drm/amd/
> Remove scheduler_class from kfd_priv.h as it was never used
> Add skeleton implementation of the Get Version IOCTL
> 
> Signed-off-by: Oded Gabbay <oded.gabbay@....com>

It seems v6 of this patch is included in today's linux-next (ie,
next-20141121).

>  drivers/gpu/drm/Kconfig                  |   2 +
>  drivers/gpu/drm/Makefile                 |   1 +
>  drivers/gpu/drm/amd/amdkfd/Kconfig       |  10 ++
>  drivers/gpu/drm/amd/amdkfd/Makefile      |   9 ++
>  drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 210 +++++++++++++++++++++++++++++++
>  drivers/gpu/drm/amd/amdkfd/kfd_device.c  | 130 +++++++++++++++++++
>  drivers/gpu/drm/amd/amdkfd/kfd_module.c  | 101 +++++++++++++++
>  drivers/gpu/drm/amd/amdkfd/kfd_priv.h    |  81 ++++++++++++
>  8 files changed, 544 insertions(+)
> [...]
> diff --git a/drivers/gpu/drm/amd/amdkfd/Kconfig b/drivers/gpu/drm/amd/amdkfd/Kconfig
> new file mode 100644
> index 0000000..a2ae6d4
> --- /dev/null
> +++ b/drivers/gpu/drm/amd/amdkfd/Kconfig
> @@ -0,0 +1,10 @@
> +#
> +# Heterogenous system architecture configuration
> +#
> +
> +config HSA_AMD
> +	tristate "HSA kernel driver for AMD GPU devices"
> +	depends on (DRM_RADEON || DRM_AMDGPU) && AMD_IOMMU_V2 && X86_64

There's currently no Kconfig symbol DRM_AMDGPU (nor anything similar).
Will that symbol be added in a future patch?

> +	default m
> +	help
> +	  Enable this if you want to use HSA features on AMD GPU devices.


Paul Bolle

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