Date: Sat, 16 Jul 2016 12:58:43 +0200 From: Willem Offermans <Willem@Offermans.Rompen.nl> To: Andrew Stevenson <andrew@ugh.net.au> Cc: freebsd-wireless@freebsd.org Subject: Re: bf_next not NULL! Message-ID: <20160716105843.GA5832@vpn.offrom.nl> In-Reply-To: <2DEF8DBE-1444-435C-B48C-FEAB71CA60E5@ugh.net.au> References: <2DEF8DBE-1444-435C-B48C-FEAB71CA60E5@ugh.net.au>
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Hello FreeBSD friends, On Sat, Jul 16, 2016 at 12:12:40PM +0200, Andrew Stevenson wrote: > Hi, > > I have an Atheros 9227 card in AP mode. It looks like there is some packet loss at the wireless layer, resulting in large delays at the IP layer. Also, every few days, nothing seems to be able to associate. Restarting the interface (/etc/rc.d/netif restart wlan0) fixes that but the possible packet loss remains. > > I notice quite numerous errors in dmesg. Bursts of: > > ath0: ath_tx_default_comp: bf 0xfffffe0000826aa0: seqno 550: bf_next not NULL! > ath0: ath_tx_default_comp: bf 0xfffffe0000831d20: seqno 551: bf_next not NULL! > ath0: ath_tx_default_comp: bf 0xfffffe0000827298: seqno 552: bf_next not NULL! > ath0: ath_tx_default_comp: bf 0xfffffe0000815bb0: seqno 553: bf_next not NULL! > ath0: ath_tx_default_comp: bf 0xfffffe0000821160: seqno 554: bf_next not NULL! > > That can go on for about 20 lines, plus the ubiquitous: > > ath0: stuck beacon; resetting (bmiss count 4) > ath0: stuck beacon; resetting (bmiss count 4) > ath0: stuck beacon; resetting (bmiss count 4) > > that seems to be pretty regular. > > My card from dmesg: > > ath0: <Atheros 9227> mem 0x48100000-0x4810ffff irq 21 at device 0.0 on pci4 > ath0: [HT] enabling HT modes > ath0: [HT] enabling short-GI in 20MHz mode > ath0: [HT] 1 stream STBC receive enabled > ath0: [HT] 1 stream STBC transmit enabled > ath0: [HT] 2 RX streams; 2 TX streams > ath0: Enabling register serialisation > ath0: AR9227 mac 384.2 RF5133 phy 15.15 > ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0 > > And ifconfig output: > > wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > ether 64:70:02:f0:c8:03 > inet 10.0.1.1 netmask 0xffffff00 broadcast 10.0.1.255 > inet6 fe80::6670:2ff:fef0:c803%wlan0 prefixlen 64 scopeid 0x6 > nd6 options=61<PERFORMNUD,AUTO_LINKLOCAL,NO_RADR> > media: IEEE 802.11 Wireless Ethernet autoselect mode 11g <hostap> > status: running > ssid UgH channel 11 (2462 MHz 11g) bssid 64:70:02:f0:c8:03 > regdomain ETSI country DE indoor ecm authmode WPA2/802.11i > privacy MIXED deftxkey 3 AES-CCM 2:128-bit AES-CCM 3:128-bit > txpower 30 scanvalid 60 protmode CTS wme burst dtimperiod 1 -dfs > > I had previously been using 11ng but have just tried switching to see if 11g had the same problems (it seems to). > > I'm running 10.3-STABLE r302736. > > Any ideas? > > Thanks, > Maybe it is not related, maybe it is..... I tried to use an Atheros AR938x card in AP mode on FreeBSD 10.3, r302295 and 11.0, r297415 for quite some time now. Of course I got the ``ath0: stuck beacon; resetting (bmiss count 4)`` over and over again. Beside this, I also observed the following messages: Jul 12 11:15:47 kwik kernel: ath0: ath_edma_tx_processq: Q3: empty? Jul 12 11:15:47 kwik kernel: ath0: ath_edma_tx_processq: Q3: empty? Jul 12 12:13:33 kwik kernel: ath0: ath_edma_recv_tasklet: sc_inreset_cnt > 0; skipping Jul 12 15:10:19 kwik kernel: ath0: ath_edma_recv_tasklet: sc_inreset_cnt > 0; skipping Jul 12 16:10:32 kwik kernel: ath0: ath_edma_recv_tasklet: sc_inreset_cnt > 0; skipping Jul 12 18:40:01 kwik kernel: ath0: ath_edma_recv_tasklet: sc_inreset_cnt > 0; skipping Jul 12 18:42:36 kwik kernel: ath0: ath_edma_recv_tasklet: sc_inreset_cnt > 0; skipping Jul 12 19:52:05 kwik kernel: ath0: ath_edma_recv_tasklet: sc_inreset_cnt > 0; skipping Jul 12 20:11:45 kwik kernel: ath0: ath_edma_recv_tasklet: sc_inreset_cnt > 0; skipping and Jun 9 07:37:57 kwik kernel: ath0: stuck beacon; resetting (bmiss count 4) Jun 9 22:21:35 kwik kernel: ath0: hardware error; resetting Jun 9 22:21:35 kwik kernel: ath0: 0x00000000 0x00000000 0x00000000, 0x00000000 0x00000000 0x00000000 Jun 9 22:21:35 kwik kernel: ath0: hardware error; resetting Jun 9 22:21:35 kwik kernel: ath0: 0x00000000 0x00000000 0x00000000, 0x00000000 0x00000000 0x00000000 Jun 9 23:07:35 kwik kernel: ath0: stuck beacon; resetting (bmiss count 4) The Wifi was so unstable that I looked for a different solution. My card from dmesg: ath0: <Atheros AR938x> mem 0xfbfe0000-0xfbffffff irq 16 at device 0.0 on pci1 ar9300_attach: calling ar9300_hw_attach ar9300_hw_attach: calling ar9300_eeprom_attach ar9300_flash_map: unimplemented for now Restoring Cal data from DRAM Restoring Cal data from EEPROM ar9300_hw_attach: ar9300_eeprom_attach returned 0 ath0: [HT] enabling HT modes ath0: [HT] enabling short-GI in 20MHz mode ath0: [HT] 1 stream STBC receive enabled ath0: [HT] 1 stream STBC transmit enabled ath0: [HT] 3 RX streams; 3 TX streams ath0: AR9380 mac 448.3 RF5110 phy 3779.2 ath0: 2GHz radio: 0x0000; 5GHz radio: 0x0000 wlan0: flags=8c43<UP,BROADCAST,RUNNING,OACTIVE,SIMPLEX,MULTICAST> metric 0 mtu 1500 ether c4:6e:1f:1e:b6:32 inet 192.168.5.1 netmask 0xffffff00 broadcast 192.168.5.255 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng (autoselect) status: no carrier ssid MyWirelessSSID channel 108 (5540 MHz 11a) regdomain ETSI country indoor ecm authmode OPEN privacy OFF txpower 23 bmiss 7 mcastrate 6 mgmtrate 6 scanvalid 60 wme burst bintval 0 groups: wlan
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