Re: [Ocf-linux-users] OCF compatible driver for HiFN Xcellerator Card 8155HXL-G

[David M. <Dav...@se...>]

Jivin hiren joshi lays it down ...
> Hello,
> 
> I am having a HiFN Xcellerator Card 8155HXL-G (DS250 - DS255 series).
> I want to use this card with Openswan/KLIPS via OCF.
> 
> >From ocf-linux-20080917/ocf/ChangeLog,
> 
> 2007-07-25 21:25  davidm
> 
>         * Makefile, hifn/Makefile, hifn/hifnHIPP.c, hifn/hifnHIPPreg.h,
>         hifn/hifnHIPPvar.h, ixp4xx/Makefile, ocfnull/Makefile,
>         safe/Makefile, talitos/Makefile:
> 
>         Bring in the hifnHIPP driver written by Xelerance.  This is the
>         super hifn chip with full protocol offload.
> 
> So I think my card - 8155 (which belongs to HIPP-I/II family) is supported.
> 
> However I noted that in the HIPP driver file
> (ocf-linux-20080917/ocf/hifn/hifnHIPP.c),
> the call to crypto_register is commented out:
> 
> #if 0 /* no code here yet ?? */
> 	crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
> #endif
> 
> Also, the callback functions hipp_newsession, hipp_process and
> hipp_freesession just return EINVAL, and there is no crypto_done, crypto_kdone.
> 
> So I am just curious about the state of this driver.

Sadly, there is no 8155 or compatible driver.  This is just a left over
of something that never eventuated IIRC.

> Please guide me about how should I approach to use this card with OCF
> for Openswan.

I think you need to get the appropriate "devkit" from hifn, then write a
driver somewhat along the lines of either ixp4xx driver or the ep80579
driver that also rely on externally provided devkits.

It is usually a much simpler task to support such devices at they have a
nice API etc and you do not need to write a full HW driver.

Cheers,
Davidm

-- 
David McCullough,  dav...@se...,  Ph:+61 734352815
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