Crypto Hardware Drivers?

[Kent Borg <kentborg@borg.org>]

Is this the right place to ask questions about writing a Linux device 
driver to make some crypto hardware on an ARM SoC work under the Linux 
crypto API?

I have some hardware documentation that I don't yet know whether I can 
talk about (I know, if I can't then the driver will have difficulty 
being be GPL, and if it isn't an open license, it won't work...).

I have some sample code for the hardware that is an incomplete and 
obsolete Linux module.
I can see source code examples for things like the Padlock, IXP4xx 
hardware, etc.
I have never touched any Linux kernel crypto code before this project.  
(I have done some stuff in userland, so the fact of crypto doesn't scare 
me.)

At the moment I am trying to understand things like the parameter to 
crypto_register_alg(), how that is different from crypto_register_ahash()...

And for a DMA case how data moves and who owns the memory. 

Stuff like that...

Yes, the sources and Google are my friends, and 
Documentation/crypto/api-intro.txt has a very promising title but 
doesn't say terribly much inside.

Are there any obvious key resources I should know about?  (Any general 
pointers would be appreciated, too.)


Thanks,

-kb