iwlwifi: ToF usage

iwlwifi: ToF usage

[Joel B]

Hi,

Starting to play around with the FTM/ToF support in iwlwifi, but 
documentation is (understandably) scarce at this point. Using a pair of 
8260:s I had lying around.

Can someone give me some hints on how to work the debugfs API for a 
successful measurement?

I've set up one card as AP with hostapd (with ftm_responder=1 and 
ftm_initiator=1 in hostapd.conf), the other as a STA.

 From the STA, I've played with 'tof_range_request' in debugfs. Writing 
send_range_request=1, which it doesn't choke on or anything, but nothing 
seems to happen. Guess I need to set things up a bit first, but how?

If it's possible to get this to work at all at this stage, some hints on 
how to do it would be great.


Thanks,
Joel

Re: iwlwifi: ToF usage

[Joel Bjurström]

Including some people I've seen mentioned in ToF-related e-mails...

This is what I've tried:


-- Responder --

* hostapd running, hostapd.conf:
	driver=nl80211
	interface=wlan1
	hw_mode=g
	channel=1
	wmm_enabled=1
	ssid=tof_test
	ftm_responder=1
	ftm_initiator=1

$ cd /sys/kernel/debug/iwlwifi/0000:06:00.0/iwlmvm/netdev:wlan1
$ echo channel_num=1 > tof_responder_params
$ echo bssid=bb:bb:bb:bb:bb:bb > tof_responder_params
$ echo rate=1 > tof_responder_params
$ echo ftm_per_burst=5 > tof_responder_params

$ echo send_responder_cfg=1 > tof_responder_params


-- Initiator --

$ cd /sys/kernel/debug/iwlwifi/0000:06:00.0/iwlmvm/netdev:wlan1
$ echo send_tof_cfg=1 > tof_enable
$ echo 'num_of_ap=1' > tof_range_request
$ echo 'ap=0 1 0 0 bb:bb:bb:bb:bb:bb 0 10 0 5 5 0 0 0 0 -40' \
	> tof_range_request

$ echo 'send_range_request=1' > tof_range_request

$ cat tof_range_response
request_id = 0
status = 2
last_in_batch = 1
num_of_aps = 0



(bb:bb:bb:bb:bb:bb is the responder's BSSID)

Am I even close? Fumbling in the dark here.

The 'status = 2' from tof_range_response comes directly from the FW, 
AFAICT. What do different values mean?


Cheers,
Joel


On 09/14/2017 09:44 PM, Joel B wrote:
> Hi,
> 
> Starting to play around with the FTM/ToF support in iwlwifi, but 
> documentation is (understandably) scarce at this point. Using a pair of 
> 8260:s I had lying around.
> 
> Can someone give me some hints on how to work the debugfs API for a 
> successful measurement?
> 
> I've set up one card as AP with hostapd (with ftm_responder=1 and 
> ftm_initiator=1 in hostapd.conf), the other as a STA.
> 
>  From the STA, I've played with 'tof_range_request' in debugfs. Writing 
> send_range_request=1, which it doesn't choke on or anything, but nothing 
> seems to happen. Guess I need to set things up a bit first, but how?
> 
> If it's possible to get this to work at all at this stage, some hints on 
> how to do it would be great.
> 
> 
> Thanks,
> Joel

Re: iwlwifi: ToF usage

[Luciano Coelho]

Hi Joel,

Unfortunately we don't have full support for ToF on the mainline kernel
yet.  But you can try to use one of our Core releases (which is a
backports-based tree) that you can find here:

You could try the release/Core30 branch, for example.

--
Cheers,
Luca.

On Thu, 2017-09-21 at 21:35 +0200, Joel Bjurström wrote:
> Including some people I've seen mentioned in ToF-related e-mails...
> 
> This is what I've tried:
> 
> 
> -- Responder --
> 
> * hostapd running, hostapd.conf:
> 	driver=nl80211
> 	interface=wlan1
> 	hw_mode=g
> 	channel=1
> 	wmm_enabled=1
> 	ssid=tof_test
> 	ftm_responder=1
> 	ftm_initiator=1
> 
> $ cd /sys/kernel/debug/iwlwifi/0000:06:00.0/iwlmvm/netdev:wlan1
> $ echo channel_num=1 > tof_responder_params
> $ echo bssid=bb:bb:bb:bb:bb:bb > tof_responder_params
> $ echo rate=1 > tof_responder_params
> $ echo ftm_per_burst=5 > tof_responder_params
> 
> $ echo send_responder_cfg=1 > tof_responder_params
> 
> 
> -- Initiator --
> 
> $ cd /sys/kernel/debug/iwlwifi/0000:06:00.0/iwlmvm/netdev:wlan1
> $ echo send_tof_cfg=1 > tof_enable
> $ echo 'num_of_ap=1' > tof_range_request
> $ echo 'ap=0 1 0 0 bb:bb:bb:bb:bb:bb 0 10 0 5 5 0 0 0 0 -40' \
> 	> tof_range_request
> 
> $ echo 'send_range_request=1' > tof_range_request
> 
> $ cat tof_range_response
> request_id = 0
> status = 2
> last_in_batch = 1
> num_of_aps = 0
> 
> 
> 
> (bb:bb:bb:bb:bb:bb is the responder's BSSID)
> 
> Am I even close? Fumbling in the dark here.
> 
> The 'status = 2' from tof_range_response comes directly from the FW, 
> AFAICT. What do different values mean?
> 
> Cheers,
> Joel
> 
> 
> On 09/14/2017 09:44 PM, Joel B wrote:
> > Hi,
> > 
> > Starting to play around with the FTM/ToF support in iwlwifi, but 
> > documentation is (understandably) scarce at this point. Using a
> > pair of 
> > 8260:s I had lying around.
> > 
> > Can someone give me some hints on how to work the debugfs API for
> > a 
> > successful measurement?
> > 
> > I've set up one card as AP with hostapd (with ftm_responder=1 and 
> > ftm_initiator=1 in hostapd.conf), the other as a STA.
> > 
> >  From the STA, I've played with 'tof_range_request' in debugfs.
> > Writing 
> > send_range_request=1, which it doesn't choke on or anything, but
> > nothing 
> > seems to happen. Guess I need to set things up a bit first, but
> > how?
> > 
> > If it's possible to get this to work at all at this stage, some
> > hints on 
> > how to do it would be great.
> > 
> > 
> > Thanks,
> > Joel

Re: iwlwifi: ToF usage

[Luca Coelho]

On Wed, 2017-10-04 at 07:52 +0300, Luciano Coelho wrote:
> Hi Joel,
> 
> Unfortunately we don't have full support for ToF on the mainline
> kernel
> yet.  But you can try to use one of our Core releases (which is a
> backports-based tree) that you can find here:
> 
> You could try the release/Core30 branch, for example.


Johannes has also created a patch on top of the latest iw tool, adding
the commands for ToF.  Please see my comment in this bugzilla entry if
you want to try that:

https://bugzilla.kernel.org/show_bug.cgi?id=197187#c1

Also, if you have any problems, please add it to bugzilla so we can
track this all in a single place.

--
Cheers,
Luca.