R7800 160MHz Wireless Interface

lantis1008 · July 18, 2021, 10:22pm

It's the same issue as the first time I got this fixed.
What exact driver version is this and I'll check for the same error.

manjotsc · July 18, 2021, 10:25pm

How do I check driver version?

manjotsc · July 18, 2021, 10:32pm

lantis1008 · July 19, 2021, 12:10am

Thanks that's good enough.
Yes it is the exact same issue as before, just this time on the 5.10 kernel:

github.com/greearb/ath10k-ct

QCA9984 160Mhz enable fail

opened 07:43AM - 15 May 19 UTC

closed 08:50PM - 16 Sep 19 UTC

NathanKuo0821

Please provide this info. See this link for more info on how to gather debug i…nfo: http://www.candelatech.com/ath10k-bugs.php Description of the problem (how to configure, how to reproduce, how often it happens). Hi , I trying to use bandwidth 160Mhz with QCA9984 pcie card , it working under 80 Mhz,But it don't work for 160Mhz I see the following errors: > nl80211: Start radar detection (CAC) 5500 MHz (ht_enabled=1, vht_enabled=1, bandwidth=160 MHz, cf1=5570 MHz, cf2=0 MHz) > * freq=5500 > * vht_enabled=1 > * ht_enabled=1 > * bandwidth=160 > * channel_width=5 > * center_freq1=5570 > * center_freq2=0 > nl80211: Failed to start radar detection: -16 (Device or resource busy) > DFS start_dfs_cac() failed, -1 Software (OS, Firmware version, kernel, driver, etc) OS : Ubuntu 18.04 Kernel : 4.18.17 Driver : ath10k-ct 4.19 Firmware : firmware-5-ct-non-commercial-9.bin hostpad : hostapd-ct 2.8 Hardware (NIC chipset, platform, etc) Platform : X86 - Laptop Chipset : WMX6401(QCA9984 ) https://www.jjplus.com/wmx6401/ Logs (dmesg, maybe supplicant and/or hostap) https://drive.google.com/open?id=1mS9lfaI9W8uH2YcfVDdOlyvl8kPW1Q31 Can you check it for me or give some advice? thank you very much.

github.com

greearb/ath10k-ct/blob/master/ath10k-5.10/mac.c#L10772-L10786

    
      
          static struct ieee80211_iface_combination ath10k_10_4_ct_if_comb[] = {
          	{
          		.limits = ath10k_10_4_ct_if_limits,
          		.n_limits = ARRAY_SIZE(ath10k_10_4_ct_if_limits),
          		.max_interfaces = 16,
          		.num_different_channels = 1,
          		.beacon_int_infra_match = true,
          #ifdef CONFIG_ATH10K_DFS_CERTIFIED
          		.radar_detect_widths =	BIT(NL80211_CHAN_WIDTH_20_NOHT) |
          					BIT(NL80211_CHAN_WIDTH_20) |
          					BIT(NL80211_CHAN_WIDTH_40) |
          					BIT(NL80211_CHAN_WIDTH_80),
          #endif
          	},
          };

It's really easy to patch and get working again. I'm not running the 21.02.x builds yet, so if someone wants to patch it and check it does work as i suggest, i'll then PR it upstream to ath10k-ct.

Maybe @KONG is generous enough to test it in his builds?

manjotsc · July 19, 2021, 12:13am

How can I patch it?

lantis1008 · July 19, 2021, 12:30am

Grab the OpenWrt source, add a patches folder to package/kernel/ath10k-ct/
Add new patch 001-fix_160mhz.patch with the contents

--- a/ath10k-5.10/mac.c
+++ b/ath10k-5.10/mac.c
@@ -10780,6 +10780,8 @@ static struct ieee80211_iface_combinatio
 		.radar_detect_widths =	BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 					BIT(NL80211_CHAN_WIDTH_20) |
 					BIT(NL80211_CHAN_WIDTH_40) |
+					BIT(NL80211_CHAN_WIDTH_80P80) |
+					BIT(NL80211_CHAN_WIDTH_160) |
 					BIT(NL80211_CHAN_WIDTH_80),
 #endif
 	},

That may not be entirely right i typed it up by hand but it's close enough

manjotsc · July 19, 2021, 12:44am

I think it's beyond my capability for archiving that. I am going to have to wait for the firmware patch to be released.

Thanks,

manjotsc · July 19, 2021, 2:08am

Do you know if this issue is fixed in Latest snapshots maybe?

lantis1008 · July 19, 2021, 2:25am

No it uses the same driver version currently.
The same issue also exists for the 5.11 and 5.12 kernel versions upstream so patching it is really the (simplest) way forward.

As soon as someone tests it and gives the I'll send it upstream. I try not to raise blind PRs so at least someone has to test it.

manjotsc · July 19, 2021, 3:00am

Is possible for you to provide guidance so that I can test it on R7800?

badulesia · July 19, 2021, 6:56am

The device complies with 160 MHz width, so I agree with the others answers, it may be a driver issue.
Remove both CT files and replace with regular drivers.

manjotsc · July 19, 2021, 7:10am

Where can I find regular drivers, under software? And which would be regular ones?

badulesia · July 19, 2021, 7:15am

Yes. they have the same names that the CT's, but without CT at the end
ath10k-firmware-qca9984
kmod-ath10k

pattagghiu · July 19, 2021, 8:12am

we also have to say that 160MHz with standard ath10k drivers is a nonsense, given that it gives no performance gain at all (the exact opposite)

lantis1008 · July 19, 2021, 11:40am

If you use ath10k-ct driver and the regular ath10k firmware files you'll get 160mhz capability because it is correctly defined there.
No idea why but anyway... probably a copy paste error

manjotsc · July 19, 2021, 6:09pm

@pattagghiu @lantis1008 I installed the regular driver, It works with 160MHz but has no performance improvement, it's no nowhere near the speed I use to get on 19.07.7 speeds of ~700mbps.

lantis1008 · July 19, 2021, 10:12pm

@greearb are you happy to patch 5.10, 5.11, 5.12 based on the information in this thread please? Or do you need it runtime tested.
If we are quick about it we may be able to fix this for 21.02 release.

manjotsc · July 19, 2021, 10:36pm

I added the patch to folder, How do I apply it on R7800?

lantis1008 · July 20, 2021, 3:17am

Now you need to build the firmware.

badulesia · July 20, 2021, 7:22pm

700 Mbps ?
With a low-end R6220 router used as AP, I have 867 Mbit/s at 80 MHz width. It allows 45 to 50 MB/s when transfering files. You surely can have much better from a R7800.