Message-ID:
 <RO2P215MB1938BA68BBB683EC696F4BFAA726A@RO2P215MB1938.LAMP215.PROD.OUTLOOK.COM>
Date: Mon, 26 Jun 2023 07:44:13 -0500
From: Sardonimous <sardonimous@...mail.com>
To: Larry Finger <Larry.Finger@...inger.net>, Arnd Bergmann <arnd@...db.de>,
 Bagas Sanjaya <bagasdotme@...il.com>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 Linux Regressions <regressions@...ts.linux.dev>,
 Linux Wireless <linux-wireless@...r.kernel.org>,
 Netdev <netdev@...r.kernel.org>
Cc: Michael Büsch <m@...s.ch>,
 kernel test robot <lkp@...el.com>, Simon Horman <simon.horman@...igine.com>,
 Kalle Valo <kvalo@...nel.org>
Subject: Re: Fwd: After kernel 6.3.7 or 6.3.8 b43 driver fails


On 6/25/23 18:05, Larry Finger wrote:
> On 6/25/23 16:11, Sardonimous wrote:
>> On 6/25/23 13:17, Larry Finger wrote:
>>
>>> On 6/25/23 13:12, Arnd Bergmann wrote:
>>>> On Sun, Jun 25, 2023, at 18:58, Sardonimous wrote:
>>>>> I have been unable to get DMA to work in the past.  So I have been
>>>>> configuring it with PIO=1 (/etc/modprobe,d/b43.conf):
>>>>>
>>>>>       options b43 pio=1 qos=0
>>>>>
>>>>
>>>> I think the qos=0 parameter is what causes the WARN_ON(), as that
>>>> causes the use of only one queue, while the warning happens when
>>>> tx function iterates over all the queues and warns that they don't
>>>> exist.
>>>
>>> I agree and suggest running with no options. If we need debug, we 
>>> can turn it on later.
>>>
>>> Larry
>>
>> Sure. Of course, this is what I started out with years ago (2017?) 
>> when I was trying to get this to work.
>>
>> Now:
>> Linux version 6.3.9-arch1-1 (linux@...hlinux) (gcc (GCC) 13.1.1 
>> 20230429, GNU ld (GNU Binutils) 2.40.0) #1 SMP PREEMPT_DYNAMIC Wed, 
>> 21 Jun 2023 20:46:20 +0000
>>
>> This is the sort of loop I get (dmesg | grep b43):
>>
>> [   31.979539] b43-pci-bridge 0000:02:00.0: Sonics Silicon Backplane 
>> found on PCI device 0000:02:00.0
>> [   35.239389] b43-phy0: Broadcom 4322 WLAN found (core revision 16)
>> [   35.275018] b43-phy0: Found PHY: Analog 8, Type 4 (N), Revision 4
>> [   35.275046] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2056, 
>> Revision 3, Version 0
>> [   66.890631] b43-phy0: Loading firmware version 784.2 (2012-08-15 
>> 21:35:19)
>> [   67.437162] b43-phy0 ERROR: DMA RX reset timed out
>> [   67.498976] b43 ssb0:0: Timeout waiting for bitmask 01800000 on 
>> register 0F90 to clear
>> [   67.707177] b43-phy0: Loading firmware version 784.2 (2012-08-15 
>> 21:35:19)
>> [  391.127300] b43-phy0 ERROR: DMA RX reset timed out
>> [  391.360514] b43-phy0 ERROR: DMA TX reset timed out
>> [  391.382127] b43 ssb0:0: Timeout waiting for bitmask 01800000 on 
>> register 0F90 to clear
>> [  391.590659] b43-phy0: Loading firmware version 784.2 (2012-08-15 
>> 21:35:19)
>> [  709.123840] b43-phy0 ERROR: DMA RX reset timed out
>> [  709.357235] b43-phy0 ERROR: DMA TX reset timed out
>> [  709.378623] b43 ssb0:0: Timeout waiting for bitmask 01800000 on 
>> register 0F90 to clear
>> [  709.573851] b43-phy0: Loading firmware version 784.2 (2012-08-15 
>> 21:35:19)
>
> Sardonimous,
>
> Did it ever work with DMA. or was PIO the only way to get it to work?

No, I never got it to work without specifying PIO=1.

> If you add in only the pio=1 option without qos, will it work?

In this case, authentication to the router fails.

[   31.021510] b43-pci-bridge 0000:02:00.0: Sonics Silicon Backplane 
found on PCI device 0000:02:00.0
[   33.889890] b43-phy0: Broadcom 4322 WLAN found (core revision 16)
[   33.925016] b43-phy0: Found PHY: Analog 8, Type 4 (N), Revision 4
[   33.925053] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2056, Revision 
3, Version 0
[   63.863977] b43-phy0: Loading firmware version 784.2 (2012-08-15 
21:35:19)
[   64.170661] b43-phy0 warning: Forced PIO by use_pio module parameter. 
This should not be needed and will result in lower performance.
[   64.550635] b43-phy0: Loading firmware version 784.2 (2012-08-15 
21:35:19)
[   64.847342] b43-phy0 warning: Forced PIO by use_pio module parameter. 
This should not be needed and will result in lower performance.
[   90.247286] b43-phy0: Loading firmware version 784.2 (2012-08-15 
21:35:19)
[   90.514031] b43-phy0 warning: Forced PIO by use_pio module parameter. 
This should not be needed and will result in lower performance.
[   91.263462] wlan0: authenticate with 0c:80:63:26:16:b5
[   91.551389] wlan0: send auth to 0c:80:63:26:16:b5 (try 1/3)
[   91.551916] wlan0: authenticated
[   91.553776] wlan0: associate with 0c:80:63:26:16:b5 (try 1/3)
[   91.554656] wlan0: RX AssocResp from 0c:80:63:26:16:b5 (capab=0x11 
status=0 aid=9)
[   91.554883] wlan0: associated
[   99.619556] wlan0: deauthenticated from 0c:80:63:26:16:b5 (Reason: 
15=4WAY_HANDSHAKE_TIMEOUT)
[  100.348068] wlan0: authenticate with 0c:80:63:26:16:b4
[  100.640896] wlan0: send auth to 0c:80:63:26:16:b4 (try 1/3)
[  100.647930] wlan0: authenticated
[  100.653778] wlan0: associate with 0c:80:63:26:16:b4 (try 1/3)
[  100.654653] wlan0: RX AssocResp from 0c:80:63:26:16:b4 (capab=0x11 
status=0 aid=9)
[  100.654884] wlan0: associated
[  108.717245] wlan0: deauthenticated from 0c:80:63:26:16:b4 (Reason: 
15=4WAY_HANDSHAKE_TIMEOUT)
[  109.267996] wlan0: authenticate with 0c:80:63:26:16:b6
[  109.767538] wlan0: send auth to 0c:80:63:26:16:b6 (try 1/3)
[  109.769105] wlan0: authenticated
[  109.773778] wlan0: associate with 0c:80:63:26:16:b6 (try 1/3)
[  109.776774] wlan0: RX AssocResp from 0c:80:63:26:16:b6 (capab=0x431 
status=0 aid=3)
[  109.777254] wlan0: associated
[  116.001372] wlan0: deauthenticating from 0c:80:63:26:16:b6 by local 
choice (Reason: 3=DEAUTH_LEAVING)
[  126.612857] wlan0: authenticate with 0c:80:63:26:16:b5
[  127.234092] wlan0: send auth to 0c:80:63:26:16:b5 (try 1/3)
[  127.234734] wlan0: authenticated
[  127.237108] wlan0: associate with 0c:80:63:26:16:b5 (try 1/3)
[  127.238173] wlan0: RX AssocResp from 0c:80:63:26:16:b5 (capab=0x11 
status=0 aid=9)
[  127.238410] wlan0: associated
[  136.279232] wlan0: deauthenticated from 0c:80:63:26:16:b5 (Reason: 
15=4WAY_HANDSHAKE_TIMEOUT)
[  136.991245] wlan0: authenticate with 0c:80:63:26:16:b4
[  137.254104] wlan0: send auth to 0c:80:63:26:16:b4 (try 1/3)
[  137.254645] wlan0: authenticated
[  137.260507] wlan0: associate with 0c:80:63:26:16:b4 (try 1/3)
[  137.261447] wlan0: RX AssocResp from 0c:80:63:26:16:b4 (capab=0x11 
status=0 aid=9)
[  137.261699] wlan0: associated
[  141.001670] wlan0: deauthenticating from 0c:80:63:26:16:b4 by local 
choice (Reason: 3=DEAUTH_LEAVING)
[  141.081565] wlan0: authenticate with 0c:80:63:26:16:b4
[  141.117429] wlan0: send auth to 0c:80:63:26:16:b4 (try 1/3)
[  141.117979] wlan0: authenticated
[  141.123927] wlan0: associate with 0c:80:63:26:16:b4 (try 1/3)
[  141.124662] wlan0: RX AssocResp from 0c:80:63:26:16:b4 (capab=0x11 
status=0 aid=9)
[  141.124895] wlan0: associated
[  149.240176] wlan0: deauthenticated from 0c:80:63:26:16:b4 (Reason: 
15=4WAY_HANDSHAKE_TIMEOUT)
[  166.273957] b43-phy0: Loading firmware version 784.2 (2012-08-15 
21:35:19)
[  166.577378] b43-phy0 warning: Forced PIO by use_pio module parameter. 
This should not be needed and will result in lower performance.
[  177.507291] b43-phy0: Loading firmware version 784.2 (2012-08-15 
21:35:19)
[  177.780745] b43-phy0 warning: Forced PIO by use_pio module parameter. 
This should not be needed and will result in lower performance.If I were 
to send you some test patches, could you create a kernel with them applied?

Doubtful.

> Larry

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