Hi,
On 11/06/2014 09:31 PM, Herbert Xu wrote:
> On Thu, Nov 06, 2014 at 09:24:22PM -0800, Tadeusz Struk wrote:
>>
>> What about aead? Using my algif_qat I can build a single request to HW
>> that preforms both encryption and authentication in one go, ever for
>> things like aes-cbc-hmac-sha1. This allows me to get great performance
>> of authenticated encryption from user space.
>
> aead is simpler as it's already part of the API so we just need to
> add algif_aead.
>
> Cheers,
>
Another thing is that the algif_skcipher works in kind of synchronous way:
------- ----------
| app |--write()--> | socket | --> build_sgl()
------- ---------- |
<----------------------------------/
------- ---------- ------
| app |--read()---> | socket | --send_to_hw()--> | HW |
------- ---------- | ------
| |
| |
<-------------------------------wait() <--------/
What I do in the algif_qat is this:
------- ---------- ------
| app |--write()--> | socket | --send_to_hw()--> | HW |
------- ---------- | ------
<----------------------------------/ |
<-------------------------/
------- ----------
| app |--read()---> | socket |
------- ----------
|
<--------------------/
This way I can get much higher throughput than with algif_skcipher.
Regards,
Tadeusz
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