ath(4) problems after sam_wifi merge

Sam Leffler sam at errno.com
Wed Jun 20 04:51:14 UTC 2007


Sam Leffler wrote:
> Rui Paulo wrote:
>> At Mon, 18 Jun 2007 19:16:18 +0800,
>> Sepherosa Ziehau wrote:
>>> On 6/18/07, Rui Paulo <rpaulo at fnop.net> wrote:
>>>> At Mon, 18 Jun 2007 06:42:58 +1200,
>>>> Andrew Thompson wrote:
>>>>> On Sun, Jun 17, 2007 at 06:42:38PM +0100, Rui Paulo wrote:
>>>>>> Hi,
>>>>>> I'm having some problems with ath after the sam_wifi branch merge.
>>>>>> Basically I have all the necessary modules loaded, but scanning is not
>>>>>> working well.
>>>>>>
>>>>>> % kldstat | egrep wlan\|ath
>>>>>>  2    1 0xc097a000 12450    if_ath.ko
>>>>>>  3    3 0xc098d000 2ec38    ath_hal.ko
>>>>>>  4    8 0xc09bc000 2b65c    wlan.ko
>>>>>>  5    2 0xc09e8000 43e8     ath_rate.ko
>>>>>> 20    1 0xc0af7000 4480     wlan_tkip.ko
>>>>>> 21    1 0xc0afc000 2fec     wlan_wep.ko
>>>>>> 22    1 0xc0aff000 7100     wlan_ccmp.ko
>>>>>> 23    1 0xc0b07000 1920     wlan_scan_ap.ko
>>>>>> 24    1 0xc0b09000 552c     wlan_scan_sta.ko
>>>>>>
>>>>>> Is anything missing?
>>>>>>
>>>>>> My card is:
>>>>>> ath0: <Atheros 5424/2424> mem 0x90100000-0x9010ffff irq 17 at device 0.0 on pci2
>>>>>> ath0: [ITHREAD]
>>>>>> ath0: using obsoleted if_watchdog interface
>>>>>> ath0: mac 10.3 phy 6.1 radio 10.2
>>>>>>
>>>>>> ath0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
>>>>>>         ether 00:17:f2:44:ba:50
>>>>>>         media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
>>>>>>         status: no carrier
>>>>>>         ssid "" channel 1 (2412 Mhz 11g)
>>>>>>         authmode OPEN privacy OFF txpowmax 34 bmiss 7 scanvalid 60 bgscan
>>>>>>         bgscanintvl 300 bgscanidle 250 roam:rssi11g 14 roam:rate11g 5
>>>>>>         protmode CTS burst bintval 100
>>>>>>
>>>>>> # ./wlandebug
>>>>>> net.wlan.0.debug: 0xffffff<assoc,auth,scan,output,state,power,dot1x,dot1xsm,radius,raddump,radkeys,wpa,acl,wme,superg,doth,inact,roam,rate>
>>>>>>
>>>>>> After ifconfig ath0 up, the scan goes as:
>>>>>>
>>>>>> ath0: ieee80211_newstate: INIT -> SCAN
>>>>>> ath0: ieee80211_check_scan: active scan, duration 2147483647, desired mode auto, flush
>>>>>> ath0: sta_pick_bss: no scan candidate
>>>>>> ath0: ieee80211_start_scan: active scan, duration 2147483647, desired mode auto, flush
>>>>>> ath0: scan set 1g dwell min 200 max 2000
>>>>>> ath0: scan_next: chan   1g ->   1g [active, dwell min 200 max 2000]
>>>>> Does your card have any channels? show the output of 'ifconfig ath0 list
>>>>> channels'
>>>> % ifconfig ath0 list channels
>>>> Channel   1 : 2412  Mhz 11g          Channel  60 : 5300* Mhz 11a
>>>> Channel   2 : 2417  Mhz 11g          Channel  64 : 5320* Mhz 11a
>>>> Channel   3 : 2422  Mhz 11g          Channel 100 : 5500* Mhz 11a
>>>> Channel   4 : 2427  Mhz 11g          Channel 104 : 5520* Mhz 11a
>>>> Channel   5 : 2432  Mhz 11g          Channel 108 : 5540* Mhz 11a
>>>> Channel   6 : 2437* Mhz 11g Turbo    Channel 112 : 5560* Mhz 11a
>>>> Channel   7 : 2442  Mhz 11g          Channel 116 : 5580* Mhz 11a
>>>> Channel   8 : 2447  Mhz 11g          Channel 120 : 5600* Mhz 11a
>>>> Channel   9 : 2452  Mhz 11g          Channel 124 : 5620* Mhz 11a
>>>> Channel  10 : 2457  Mhz 11g          Channel 128 : 5640* Mhz 11a
>>>> Channel  11 : 2462  Mhz 11g          Channel 132 : 5660* Mhz 11a
>>>> Channel  12 : 2467* Mhz 11g          Channel 136 : 5680* Mhz 11a
>>>> Channel  13 : 2472* Mhz 11g          Channel 140 : 5700* Mhz 11a
>>>> Channel  36 : 5180* Mhz 11a          Channel 149 : 5745* Mhz 11a
>>>> Channel  40 : 5200* Mhz 11a          Channel 153 : 5765* Mhz 11a
>>>> Channel  44 : 5220* Mhz 11a          Channel 157 : 5785* Mhz 11a
>>>> Channel  48 : 5240* Mhz 11a          Channel 161 : 5805* Mhz 11a
>>>> Channel  52 : 5260* Mhz 11a          Channel 165 : 5825* Mhz 11a
>>>> Channel  56 : 5280* Mhz 11a
>>>>
>>>>
>>>>> Also, are you using wpa_supplicant or passing any other options to ath
>>>>> other than just up?
>>>> No.
>>> Try this:
>>> ifconfig ath0 channel -
>>> ifconfig ath0 up scan
>> It takes a lot of time to perform a scan. And I never let it finish
>> because after 5 minutes, the ithread consumes almost all the CPU:
>>
>>    24 root          1 -68    -     0K     8K CPU1   1   1:27 92.97% irq17: ath0
> 
> I don't see the log from this scan.  The previous log indicated your
> scan set was a single channel.  The cpu time accumulated by the ithread
> indicates ath is receiving a lot of interrupts which could be caused by
> a lot of things but I'm guessing it's MIB overflow interrupts which are
> caused by phy errors (athstats will say for sure).
> 
> I believe the part you're using is the new 11n part and you are using
> the experimental hal sitting in my home directory.  This hal has known
> issues with supporting the 11n part including not tuning the radio
> parameters in response to phy errors (which would explain a high MIB
> overflow interrupt rate).

Oops, I see it's a 5424 and not 5416.  Please provide athstats output.

	Sam


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