On Tue, 2011-03-08 at 17:33 +0800, Herbert Xu wrote:
> Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx> wrote:
> >
> >> > I should mention this is with the following .config:
> >> >
> >> > CONFIG_CRYPTO_CRC32C=y
> >> > CONFIG_CRYPTO_CRC32C_INTEL=m
>
> This is why you get the unoptimised version. Had you selected
> both as built-in or both as modules, then it would have worked
> as intended.
>
<nod>
> > What about the following to simply call request_module("crc32c_intel")
> > at module_init() time and top the extra iscsi_login_setup_crypto()
> > code..?
>
> If we're going to do this we should do it in the crypto layer,
> and not litter every single crypto API user with such crap.
>
> Currently we don't invoke request_module unless no implementation
> is reigstered for an algorithm. You can change this so that it
> also invokes request_module if we have not yet done so at least
> once for that algorithm.
>
> Patches are welcome.
>
Ok, fair enough point.. I have addressed this with a new struct
crypto_alg->cra_check_optimized() callback in order for crc32c.ko to
have a method to call request_module("crc32c_intel.ko") after the base
software alg has been loaded.
This is working w/ CONFIG_CRYPTO_CRC32C=y + CONFIG_CRYPTO_CRC32C_INTEL=m
case and should satisfy current (and future) architecture dependent
cases for CRC32C HW offload.
Sending out a patch series for your comments shortly..
Thanks!
--nab
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