Re: [PATCH v4 1/2] crypto: engine - support for parallel requests

[Iuliana Prodan]

On 3/27/2020 6:44 AM, Herbert Xu wrote:
> On Tue, Mar 17, 2020 at 01:08:18PM +0000, Iuliana Prodan wrote:
>>
>> This case can happen right now, also. I can't guarantee that all drivers
>> send all requests via crypto-engine.
> 
> I think this is something that we should address.  


I agree we should not have failed requests, _with_ MAY_BACKLOG, that 
pass through crypto-engine. All these requests must me executed. For 
this case I have a solution and I'll work on it.

> If a driver
> is going to use crypto_engine then really all requests should go
> through that.  IOW, we should have a one-to-one relationship between
> engines and hardware.
> 
This cannot happen right now.
For non-crypto API requests (like split key or rng) I cannot pass them 
through crypto-engine which only supports aead, skcipher, hash and 
akcipher requests.

So, I believe that if the first problem is solved (to have all crypto 
API requests, that have backlog flag executed - retry mechanism instead 
of reporting failure) the non-crypto API request doesn't have to be pass 
through crypto-engine - these can be handled by driver.

Thanks,
Iulia