Date: Tue, 13 Mar 2012 08:01:12 -0700 From: Adrian Chadd <adrian@freebsd.org> To: saint <saint_bxg@126.com> Cc: freebsd-wireless@freebsd.org Subject: Re: Freebsd9.0 TDMA: stuck beacon problem Message-ID: <CAJ-Vmokz9CRQ%2BKu-T=G6PUgPk66oHs2gG_iVf5xvc3K3HC1v5g@mail.gmail.com> In-Reply-To: <4ef315ef.141dd.1360bee4368.Coremail.saint_bxg@126.com> References: <4ef315ef.141dd.1360bee4368.Coremail.saint_bxg@126.com>
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Hi! The 11n chipset TDMA support in 8.x was unfortunately very broken (it made the wrong assumptions about timer resolution and configuration which changed between the AR5212-era MAC and the AR5416 11n era MAC.) Figuring out what's wrong with TDMA is on my TODO list but I don't have the time at the present moment, I'm afraid. Someone popped up a few months ago and made TDMA mostly work again with the 11n NICs but I forget whether it made it into -HEAD or not. Maybe try TDMA on -HEAD. Don't enable 11n. That won't work. :) Adrian 2012/3/13 saint <saint_bxg@126.com>: > Hi Adrian: > This is Michael. > I'm trying to implement TDMA connection with two Atheros cards(AR5416 and AR9285) working on freebsd 9.0-release. > After reading the handbook, I added the build option IEEE80211_SUPPORT_TDMA, and modified loader.conf as: > if_ath_load="YES" > if_ath_pci_load="YES" > I rebuilt and reinstalled the kernel, reboot ... > After that, the ath driver can be loaded and I could configure two cards as adhoc mode and connect each other successfully. :) > But, when I configured the card as tdma mode and set it as a master(tdmaslot 0), a few seconds later, the screen was full of: > "ath0: stuck beacon; resetting( bmiss count 4)" > > > config commands: > ifconfig wlan0 create wlandev ath0 wlanmode tdma > ifconfig wlan0 ssid freebsd-tdma tdmaslotlen 2500 tdmaslot 0 > ifconfig wlan0 up (after this, "ath0: stuck beacon..." appears) > > > If I set the card as a slave( tdmaslot 1), no these output messages. :( > I tried to find the result from the code, it pointed to ath_hal_numtxpending(). (That means there are still frames pending in the QCU(AR5416)). But I didn't know why. > I searched it on the internet, many people experienced it, but none of them was the same case as mine. > > > Then I reinstalled the OS with freebsd8.2-release. There was no "ath0: stuck beacon..." :) > But under freebsd8.2, I could not connect two cards as tdma mode either(no beacons send out). Oh~~ :(:( > Card not support? OS not support? TDMA not support in 9.0 release? > Could you give me some advise, thanks a lot! > > > Best Wishes > > _______________________________________________ > freebsd-wireless@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless > To unsubscribe, send any mail to "freebsd-wireless-unsubscribe@freebsd.org"help
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