linux-kernel - Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework

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Date:	Mon, 18 Apr 2016 16:51:07 +0800
From:	Baolin Wang <baolin.wang@...aro.org>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	David Miller <davem@...emloft.net>,
	Alasdair G Kergon <agk@...hat.com>,
	Mike Snitzer <snitzer@...hat.com>, Jens Axboe <axboe@...com>,
	dm-devel@...hat.com, Andrew Morton <akpm@...ux-foundation.org>,
	david.s.gordon@...el.com, Tom Lendacky <thomas.lendacky@....com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	smueller@...onox.de, tadeusz.struk@...el.com,
	Masanari Iida <standby24x7@...il.com>, shli@...nel.org,
	Mark Brown <broonie@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-crypto@...r.kernel.org, linux-raid@...r.kernel.org
Subject: Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework

On 18 April 2016 at 16:41, Herbert Xu <herbert@...dor.apana.org.au> wrote:
> On Mon, Apr 18, 2016 at 04:40:36PM +0800, Baolin Wang wrote:
>>
>> Simply to say, now there are many different hardware engines for
>> different vendors, some engines can support bulk block but some can
>> not (or no cipher hardware engine), then the dm-crypt can not know
>> your hardware engine features. If the dm-crypt send one bulk block to
>> low level, but the engine driver can not support bulk block, then it
>> will crash. So we did the merging action in driver level not dm-crypt
>> level.
>
> Surely we can handle it in the crypto API layer, just as we do GSO
> in the network stack for drivers that can't handle TSO?

Yes, it is similar. Thanks.

>
> Cheers,
> --
> Email: Herbert Xu <herbert@...dor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt



-- 
Baolin.wang
Best Regards