linux-kernel - Re: FW: [Fwd: [PATCH]Using Intel CRC32 instruction to implement hardware accelerated CRC32c algorithm.]

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Message-ID: <20080708120050.GA6410@2ka.mipt.ru>
Date:	Tue, 8 Jul 2008 16:00:53 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	austin zhang <austin_zhang@...ux.intel.com>
Cc:	herbert@...dor.apana.org.au, davem@...emloft.net,
	chaapala@...co.com, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org, arjan@...ux.intel.com
Subject: Re: FW: [Fwd: [PATCH]Using Intel CRC32 instruction to implement hardware accelerated CRC32c algorithm.]

Hi.

On Tue, Jul 08, 2008 at 06:25:54AM -0400, austin zhang (austin_zhang@...ux.intel.com) wrote:
> > designed to support sync just as well as async despite the name)
> Do you mean use async_xxx interface?

No, async_xxx is very different hardware assist, although it can be
converted to cryptoapi too.

> > to rewrite the crypto/crc32c implementation such that one tfm can
> > be used by multiple users.  All that has to be done is to move
> > the state from the tfm into the request object.
>  
> > 2) Convert all crc32c users to use the crypto interface and phase
> > out lib/crc32c completely.
> > 
> > 3) Add the Intel-specific crc32c implementation through the crypto
> > API.
> Agreed. And which module in crypto is the template for following the crypto API?

This is some kind of how cbc(cipher) or ecb(cipher) templates are done:
cbc(aes), cbc(aes-i686) for example.
The same would be possible to do with crc32c but for checksumming (which
is effectively a hash).

-- 
	Evgeniy Polyakov
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