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Date: Tue, 11 Sep 2012 19:36:27 +0300
Message-ID: <CAFtRNNwXgr=oN8y9u9MnEt75dAL0R-tJ6yf6vTOMcnCuCb7S-A@mail.gmail.com> (sfid-20120911_183631_793862_203D70F6)
Subject: Re: [PATCH] ath5k: add support of HW encryption in management frames
From: Nick Kossifidis <mickflemm@gmail.com>
To: Yeoh Chun-Yeow <yeohchunyeow@gmail.com>
Cc: Kalle Valo <kvalo@adurom.com>, Adrian Chadd <adrian@freebsd.org>,
	Jouni Malinen <j@w1.fi>,
	Johannes Berg <johannes@sipsolutions.net>,
	linux-wireless@vger.kernel.org, jirislaby@gmail.com,
	mcgrof@qca.qualcomm.com, ath5k-devel@venema.h4ckr.net
Content-Type: text/plain; charset=UTF-8
Sender: linux-wireless-owner@vger.kernel.org

2012/9/11 Yeoh Chun-Yeow <yeohchunyeow@gmail.com>:
>> To be more clear: you can tell the hw to *only* disable decryption and
>> keep doing encryption.
>
> But the question here is that during Rx, need to do SW decryption for
> management frame and then HW decryption for unicast data frame for all
> the frame coming from the same STA. I still not so sure how to do
> that.
>
> Jouni said that the workaround is to re-encrypt(incorrectly) received
> robust unicast management frames if hwaccel for CCMP was configured
> for the transmitting STA (this is to undo the incorrect decryption
> done by the hardware) and then pass the encrypted frame to mac80211
> for software decryption.
>

How about disabling acks on hw completely and handle them on sw ? This
might keep the engine running ok for unicast frames.

#define AR5K_DIAG_SW_DIS_ACK		0x00000002	/* Disable ACKs */
#define AR5K_DIAG_SW_DIS_CTS		0x00000004	/* Disable CTSs */


-- 
GPG ID: 0xEE878588
As you read this post global entropy rises. Have Fun ;-)
Nick