linux-kernel - Re: Using aGPU for RAID calculations (proprietary GRAID SupremeRAID)

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Message-ID: <20211130164614.GB3627665@dhcp-10-100-145-180.wdc.com>
Date:   Tue, 30 Nov 2021 08:46:14 -0800
From:   Keith Busch <kbusch@...nel.org>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     linux-raid@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        linux-accelerators@...ts.ozlabs.org, linux-nvme@...ts.infradead.org
Subject: Re: Using aGPU for RAID calculations (proprietary GRAID SupremeRAID)

On Tue, Nov 30, 2021 at 12:58:10PM +0100, Paul Menzel wrote:
> If GPUs are that much better, are people already working on a FLOSS solution
> for the Linux kernel, so people can “just” plug in a graphics card to
> increase the speed?
> 
> Does the Linux kernel already have an API to offload calculations to
> accelerator cards, so it’s basically plug and play (with AMD graphics cards
> for example using HSA/KFD)? Entropy sources, like the ChaosKey [3], work
> like that. If not, would the implementation go under `lib/raid6`?

I'm not very familiar with the subsystem, but I think these types of
operation APIs are implemented under crypto/async_tx/.