Hi! I've added the common ratectl state as an mbuf tag!
After days of frustration (compile errors, boot failed, kernel panics, suddenly kernel freezing...), it seems that ath now can use 11n-aware net80211 ratectl api to do rate control. Attachment[0] is the diff of modifications to dev/ath. Changes to net80211 is minor this time. Just add some debug msgs to it. Please reference my gsoc svn repo<https://svnweb.freebsd.org/socsvn/soc2013/ccqin/head/> . It's worth mentioning that sometimes the kernel will "freezing" (it looks like all things stop working, screen is freezing, keyboard and mouse are not responding) after wireless stuff start working for a while. At first, I consider it caused by my modification to ath. But this strange thing can also happen in a head kernel (r255382). Attachment[1] is some useful messages just before it happens. By the way, I use a AR9227 device. And, I found that, for aggregation scenario, ath gathers tx information and update the ratectl states. So, what we can do to net80211 to let it support aggregation? Thanks! Chenchong On Tue, Sep 3, 2013 at 9:29 AM, Chenchong Qin <[email protected]>wrote: > OK! > > Thanks! :-) > > Chenchong > > > On Tue, Sep 3, 2013 at 1:56 AM, Adrian Chadd <[email protected]> wrote: > >> Hi! >> >> You can declare an mbuf tag and use that. Look at M_TXCB in net80211 and >> how mbuf tags are added. >> >> I've long thought about adding a net80211 mbuf tag to represent -all- of >> the tx related state - TX callback, rate control, rate completion, >> aggregation state, retry count, etc. That way all the drivers can use it. >> >> >> >> -adrian >> >> >
20130908-net80211-ratectl-ath.diff
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freezing.log
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