linux-kernel - RE: Patching ath9k/mac80211 to change MAC layer features

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Message-ID: <BLU158-w5217D3FF20A9A3110002AA876F0@phx.gbl>
Date:	Sun, 19 Jun 2011 17:13:08 +0100
From:	Fred Matthews <fredmm@...mail.co.uk>
To:	<linux-kernel@...r.kernel.org>, <linux-wireless@...r.kernel.org>,
	<ath9k-devel@...ema.h4ckr.net>, <ath9k-devel@...ts.ath9k>
Subject: RE: Patching ath9k/mac80211 to change MAC layer features

Hi,

I would appreciate if anyone can help me with my previous query as soon as possible.
Thanks!
From: fredmm@...mail.co.uk
To: linux-kernel@...r.kernel.org; linux-wireless@...r.kernel.org; ath9k-devel@...ema.h4ckr.net; ath9k-devel@...ts.ath9k
Subject: Patching ath9k/mac80211 to change MAC layer features
Date: Thu, 16 Jun 2011 21:39:09 +0100

Hello all,

I have a query regarding patching ath9k/mac80211 to change MAC layer features and I would be most grateful if someone can assist.

I need to patch ath9k so that I can be able to modify/fix the A-MPDU aggregation frame length and other parameters such that they can be configured at runtime via debugfs. I made a newbie attempt at trying to change the aggregate length (attached), but I am unsure of the correctness/efficiency  - when applied throughput varies with different frame lengths entered but I can't be sure if its actually changing the aggregation length (passes the framelen/aggr_limit). Hence I would be very grateful if someone can assist in the correct way of doing this (possibly directly via mac80211). 

Also if the ampdu aggregate length is changed I believe the number/length of the subframes of the aggregate stays constant (at the default which is 32). I try to change this in my patch as well as the maximum software retries by just changing the default definition in ath9k.h, thus is there a (more) correct/better way of changing these. Finally, how can I patch the driver to be able to disable Block-Acks/aggregation via debugfs or otherwise. 

I highly appreciate, help in any of the above, as well as other advice,
Many thanks

View attachment "aggr+subframe+retry_change_attempt.patch" of type "text/x-patch" (7987 bytes)