linux-kernel - Re: staging: rtl8192e: Replace drivers rtllib_crypt_ccmp_... with lib80211_crypt

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Date:   Sun, 28 May 2023 13:37:25 -0500
From:   Larry Finger <Larry.Finger@...inger.net>
To:     Philipp Hortmann <philipp.g.hortmann@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: staging: rtl8192e: Replace drivers rtllib_crypt_ccmp_... with
 lib80211_crypt_...

On 5/28/23 01:38, Philipp Hortmann wrote:
> Hi,
> 
> it is possible to remove three modules from the staging area by replacing:
> rtllib_crypt_ccmp with lib80211_crypt_ccmp
> rtllib_crypt_tkip with lib80211_crypt_tkip
> rtllib_crypt_wep with lib80211_crypt_wep
> 
> The following issues arise:
> - rtl8192e needs to be switched to software encryption or
>    lib80211_crypt_... needs to be extended with hardware encryption.
> - Performance is dropping on my computer from 12,5MB/s to 1,5MB/s when
>    switching to software encryption.(it does not really change if I use
>    rtllib_crypt_ccmp or lib80211_crypt_ccmp)
> - Fix: rtllib_rx_decrypt: decrypt frame error that occure sometimes on
>    lib80211_crypt_ccmp
> 
> Below the changes on the driver that made use of lib80211_crypt_... possible.
> 
> So the questions are:
> Is it worth the effort or is this going in the wrong direction?
> Does it help the kernel community or is it just creating more effort?
> Why does LIB80211 not support hardware encryption? Or does it?

I do not know why LIB80211 does not support hardware encryption, but the 
performance hit you report is not acceptable!

Larry