Re: Fwd: After kernel 6.3.7 or 6.3.8 b43 driver fails

[Larry Finger]

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@archlinux) (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?

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

If I were to send you some test patches, could you create a kernel with them 
applied?

Larry