Hello Larry,
On 6/24/23 23:41, Larry Finger wrote:
Sardonimous,
The critical line is:
Jun 20 18:20:11 askasleikir kernel: b43_pio_tx+0x373/0x390
I certainly have not used PIO for a long time. I expect that your
MacBook Pro should do DMA on the b43. Apple makes wierd hardware, but
not likely that wierd.
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
Does dmesg offer any clues as to what is happening?
If I try with, say:
options b43 pio=0 qos=0 verbose=3
Then
rmmod b43
rmmod ssb
modprobe b43
I see the following:
insmod /lib/modules/6.1.12-arch1-1/kernel/drivers/ssb/ssb.ko.zst
insmod
/lib/modules/6.1.12-arch1-1/kernel/drivers/net/wireless/broadcom/b43/b43.ko.zst
pio=0 qos=0 verbose=3
...
[Jun25 11:51] ssb: Found chip with id 0x4322, rev 0x01 and package 0x0A
[ +0.096950] b43-pci-bridge 0000:02:00.0: Sonics Silicon Backplane
found on PCI device 0000:02:00.0
[ +0.411653] b43-phy1: Broadcom 4322 WLAN found (core revision 16)
[ +0.038206] b43-phy1: Found PHY: Analog 8, Type 4 (N), Revision 4
[ +0.000032] b43-phy1: Found Radio: Manuf 0x17F, ID 0x2056, Revision 3,
Version 0
[ +0.015660] Broadcom 43xx driver loaded [ Features: PNLS ]
[ +0.520933] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
[ +0.726559] b43-phy1: Loading firmware version 784.2 (2012-08-15 21:35:19)
[ +0.276596] b43-phy1 debug: Chip initialized
[ +0.000562] b43-phy1 debug: 64-bit DMA initialized
[ +0.000013] b43-phy1 debug: QoS disabled
[ +0.023145] b43-phy1 debug: Wireless interface started
[ +0.056159] b43-phy1 debug: Adding Interface type 2
[ +0.086691] b43-phy1 debug: Removing Interface type 2
[ +0.000105] b43-phy1 debug: Wireless interface stopped
[ +0.099849] b43-phy1 ERROR: DMA RX reset timed out
[ +0.065067] b43 ssb0:0: Timeout waiting for bitmask 01800000 on
register 0F90 to clear
[ +0.204905] b43-phy1: Loading firmware version 784.2 (2012-08-15 21:35:19)
[ +0.296681] b43-phy1 debug: Chip initialized
[ +0.000555] b43-phy1 debug: 64-bit DMA initialized
[ +0.000010] b43-phy1 debug: QoS disabled
[ +0.027099] b43-phy1 debug: Wireless interface started
[ +0.062503] b43-phy1 debug: Adding Interface type 2
The wlan0 device never seems to work, no IP address is obtained, etc.
If there is nothing shown in the log, you definitely need to do a
proper bisection from the mainline git tree to isolate the change that
led to this failure.
Still working on initial kernel build.
ADDED WITH EDIT: I looked at the code and b43 will not be built for
any hardware without DMA, thus it appears that adding "b43.pio=1" is
the only way to get PIO mode. Please check the output of dmesg for PIO
messages.
Larry
Thanks & regards,
Sardonimous
