mac80211 questions
Tchang Chen (ST-CO/ENG1.3)
Chen.Tchang at nl.bosch.com
Wed May 4 10:10:37 EDT 2011
Hello Hong.
I installed wpa_supplicant and tried to associate to the AP (now with rt2800pci) , but
1. the available rt2x00 driver did not support WPA (probably option not enabled during build)
2. the wext driver could be used, but did not give improvement (so also did not associate)
(phy0 -> rt2800_wait_Wpdma_ready: Error - WPDMA TX/RX busy)
I suspect my problem still is somewhere in the SoftMAC (mac_80211).
Q1: which and how to set additional compiler flag for debugging mac80211 ?
Q2: which signals are relevant or can be monitored ?
(e.g. lspci -vv )
Q3: how about the DMA sequence / interface ?
Best regards,
Chen
________________________________
From: hong zhang [mailto:henryzhang62 at yahoo.com]
Sent: Wednesday, May 04, 2011 3:30 AM
To: Tchang Chen (ST-CO/ENG1.3)
Cc: libnl at lists.infradead.org
Subject: RE: mac80211 questions
If you want to associate to AP. You better use wpa_supplicant (wireless API).
--- On Thu, 4/28/11, Tchang Chen (ST-CO/ENG1.3) <Chen.Tchang at nl.bosch.com> wrote:
From: Tchang Chen (ST-CO/ENG1.3) <Chen.Tchang at nl.bosch.com>
Subject: RE: mac80211 questions
To: "hong zhang" <henryzhang62 at yahoo.com>
Cc: "libnl at lists.infradead.org" <libnl at lists.infradead.org>
Date: Thursday, April 28, 2011, 9:29 AM
Hello Hong,
Here is the whole action sequence (I added some extra print statements for debugging purposes).
lspci
00:00.0 Host bridge: Xilinx Corporation: Unknown device 0300 (rev 1a)
00:01.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link Controller Audio Device (rev 02)
00:02.0 ISA bridge: ALi Corporation M1533/M1535/M1543 PCI to ISA Bridge [Aladdin IV/V/V+]
00:03.0 Modem: ALi Corporation M5457 AC'97 Modem Controller
00:09.0 PCI bridge: Texas Instruments PCI2250 PCI-to-PCI Bridge (rev 02)
00:0c.0 Non-VGA unclassified device: ALi Corporation M7101 Power Management Controller [PMU]
00:0f.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
01:03.0 Network controller: Ralink corp. RT2561/RT61 rev B 802.11g
~ # modprobe rt2x00lib
~ # modprobe rt2x00pci
~ # modprobe rt61pci
rt61pci 0000:01:03.0: enabling device (0000 -> 0002)
rt61pci 0000:01:03.0: enabling bus mastering
rt61pci 0000:01:03.0: enabling Mem-Wr-Inval
phy0 -> rt61pci_validate_eeprom: EEPROM recovery - NIC: 0xff80
phy0 -> rt2x00_set_chip: Info - Chipset detected - rt: 2561, rf: 0003, rev: 000c.
ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
Registered led device: rt61pci-phy0::radio
Registered led device: rt61pci-phy0::assoc
~ # lsmod
rt61pci 26972 0 - Live 0xe00b7000
rt2x00pci 3706 1 rt61pci, Live 0xe00a5000
rt2x00lib 32489 2 rt61pci,rt2x00pci, Live 0xe0076000
~ # iwconfig wlan0 essid CTC
~ # iwconfig wlan0 channel 6
~ # iwconfig wlan0 enc off rate 12Mb/s
~ # iwconfig wlan0 ap 00:13:F7:44:21:74
~ # iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"CTC"
Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated
Tx-Power=0 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
~ # ifconfig wlan0 192.168.2.11 up
phy0 -> rt2x00lib_start: Info - Entering rt2x00lib_start ....
phy0 -> rt2x00lib_request_firmware: Info - Loading firmware file 'rt2561.bin'.
phy0 -> rt2x00lib_request_firmware: Info - Firmware detected - version: 0.8.
phy0 -> rt2x00lib_request_firmware: Info - Firmware checked - FW_OK
phy0 -> rt2x00lib_load_firmware: Info - Firmware loaded, retval = 0.
phy0 -> rt2x00lib_start: Info - Firmware has been loaded '0'.
phy0 -> rt2x00lib_start: Info - Device has been initialized '0'.
phy0 -> rt2x00lib_enable_radio: Info - Initializing all data queues ...
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 4
phy0 -> rt2x00lib_enable_radio: Info - All data queues have been initialized ...
phy0 -> rt2x00lib_enable_radio: Info - Set device state to RADIO on, status = 0.
phy0 -> rt2x00lib_enable_radio: Info - Setting state, led_radio and led_activity.
phy0 -> rt2x00lib_enable_radio: Info - Enabling RX ....
phy0 -> rt2x00lib_enable_radio: Info - Starting watchdog monitoring...
phy0 -> rt2x00lib_enable_radio: Info - Waking the queues ....
phy0 -> rt2x00lib_start: Info - Radio has been enabled '0'.
ieee80211 phy0: Idle on, Count= 0
ieee80211 phy0: device now idle
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 0 - CWmin: 3, CWmax: 4, Aifs: 2, TXop: 102.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 1 - CWmin: 4, CWmax: 5, Aifs: 2, TXop: 188.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 2 - CWmin: 5, CWmax: 10, Aifs: 3, TXop: 0.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 3 - CWmin: 5, CWmax: 10, Aifs: 7, TXop: 0.
ieee80211 phy0: device no longer idle - scanning
~ # ieee80211 phy0: Idle on, Count= 0
ieee80211 phy0: device now idle
ieee80211 phy0: Idle on, Count= 0
ieee80211 phy0: Idle on, Count= 0
iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"CTC"
Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated
Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
~ # ifconfig wlan0 192.168.2.11 down
ieee80211 phy0: Idle on, Count= 0
~ #
~ # ifconfig wlan0 192.168.2.11 up
phy0 -> rt2x00lib_start: Info - Entering rt2x00lib_start ....
phy0 -> rt2x00lib_load_firmware: Info - Firmware loaded, retval = 0.
phy0 -> rt2x00lib_start: Info - Firmware has been loaded '0'.
phy0 -> rt2x00lib_start: Info - Device has been initialized '0'.
phy0 -> rt2x00lib_enable_radio: Info - Initializing all data queues ...
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 24
phy0 -> rt2x00queue_init_queues: Info - Resetting queue ....
phy0 -> rt2x00queue_init_queues: Info - queue->limit = 4
phy0 -> rt2x00lib_enable_radio: Info - All data queues have been initialized ...
<Here the program stalls in module rt2x00dev.c, function rx2x00lib_enable_radio
at the point that the state is being set to STATE_RADIO_ON, see below ...>
/*
* Initialize all data queues.
*/
/* Added by C. Tchang */
INFO(rt2x00dev, "Initializing all data queues ...\n");
/* End added */
rt2x00queue_init_queues (rt2x00dev);
/* Added by C. Tchang */
INFO(rt2x00dev, "All data queues have been initialized ...\n");
/* End added */
/*
* Enable radio.
*/
status =
rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
/* Added by C. Tchang */
INFO(rt2x00dev, "Set device state to RADIO on, status = %d.\n", status);
/* End added */
if (status)
return status;
---------------------------------------------------
Q1: What could be the reason for this behavior ?
I suppose there should be some acknowledge (or time-out) of the state transition.
Q2: How can I locate the respons of the Wireless card ?
Q3: How can this be resolved ?
Thx (again) for your support,
Chen
________________________________
From: hong zhang [mailto:henryzhang62 at yahoo.com]
Sent: Thursday, April 28, 2011 4:05 AM
To: Tchang Chen (ST-CO/ENG1.3)
Cc: libnl at lists.infradead.org
Subject: RE: mac80211 questions
Which command does association?
I do not see any commands of both wireless extension and iw for scan, associate.
--- On Wed, 4/27/11, Tchang Chen (ST-CO/ENG1.3) <Chen.Tchang at nl.bosch.com> wrote:
From: Tchang Chen (ST-CO/ENG1.3) <Chen.Tchang at nl.bosch.com>
Subject: RE: mac80211 questions
To: "hong zhang" <henryzhang62 at yahoo.com>
Cc: "libnl at lists.infradead.org" <libnl at lists.infradead.org>
Date: Wednesday, April 27, 2011, 5:23 AM
Hello Hong,
Thanks for your reply to my libnl questions.
I currently use the old Wireless Extensions to configure my link.
I don't think using Wireless Extensions (in stead of iw) is the problem, but more the mac80211
or even the link to the hardware signals.
After loading the modules (mac80211, rt2x00lib, rt2x00pci and rt61pci) for a
Ralink RT2561 mini-PCI wireless card, I tried to setup a wireless link
(essid, channel, rate, end key off, ap have been correctly set).
I get the following feedback:
~ # ifconfig wlan0 192.168.2.2 up
phy0 -> rt2x00lib_request_firmware: Info - Loading firmware file 'rt2561.bin'.
phy0 -> rt2x00lib_request_firmware: Info - Firmware detected - version: 0.8.
phy0 -> rt2x00lib_request_firmware: Info - Firmware checked - FW_OK
phy0 -> rt2x00lib_load_firmware: Info - Firmware loaded, retval = 0.
phy0 -> rt2x00lib_start: Info - Device has been initialized '0'.
phy0 -> rt2x00lib_start: Info - Radio has been enabled '0'.
ieee80211 phy0: device now idle
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 0 - CWmin: 3, CWmax: 4, Aifs: 2, TXop: 102.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 1 - CWmin: 4, CWmax: 5, Aifs: 2, TXop: 188.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 2 - CWmin: 5, CWmax: 10, Aifs: 3, TXop: 0.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 3 - CWmin: 5, CWmax: 10, Aifs: 7, TXop: 0.
ieee80211 phy0: device no longer idle - scanning
ieee80211 phy0: device now idle
iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"CTC"
Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated
Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
The system did not manage to associate with the AP.
Q1: What can be the reason(s) for not obtaining an association with the AP ?
Q2: Where can I find more detailed information about the corresponding action sequences ?
Q3: Which source files in mac80211 are involved ?
I could not locate net/mac80211/ieee80211_sta.c in 2.6.37-4.
Q4: Do you perhaps have any further suggestions how to debug this issue ?
Hope you can help me again,
Best regards,
Chen
________________________________
From: hong zhang [mailto:henryzhang62 at yahoo.com]
Sent: Wednesday, April 27, 2011 3:10 AM
To: libnl at lists.infradead.org; Tchang Chen (ST-CO/ENG1.3)
Subject: Re: Libnl questions
--- On Tue, 4/26/11, Tchang Chen (ST-CO/ENG1.3) <Chen.Tchang at nl.bosch.com> wrote:
From: Tchang Chen (ST-CO/ENG1.3) <Chen.Tchang at nl.bosch.com>
Subject: Libnl questions
To: "libnl at lists.infradead.org" <libnl at lists.infradead.org>
Date: Tuesday, April 26, 2011, 4:16 AM
Hi,
I would like to use iw-0.9.22 in combination with cfg80211, libnl and Linux kernel 2.6.37-4.
I noticed that cfg80211 is part of the Linux kernel distribution 2.6.37-4.
Q1: Can I use the latest libnl-3.0 in combination with the software mentioned above ?
Or do I have to apply an earlier version ? If so, which version will fit best ?
ANS: Yes, you should be able to do it.
Q2: I understand that nl80211 and cfg80211 are intended to replace Wireless-Extensions.
Do is the additional value of nl80211 ? Will cfg80211 be sufficient for setup and configuration ?
ANS: Yes, iw is degined to communicate with wireless driver using nl80211/cfg80211 and wireless stack.
Q3: I suspect that libnl should be implemented as user kernel module in kernel space.
Is this assumption correct ?
ANS: Actually, libnl is used for user space and kernel space.
Q4: Are there any other issues, which should be taken in mind for achieving a succesful implementation ?
ANS: You use it and tell us what you find out.
My hardware platform:
PetaLinux v2.1 (embedded Linux 2.6.37-4 for a MicroBlaze softcore processor on a FPGA)
Hope you can help me with these questions,
Thx and best regards,
Chen
Chen C. Tchang
BOSCH Security systems B.V.
ST-CO/ENG1.3 Development
Kapittelweg 10,
4827 HG Breda
The Netherlands
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