Hi Folks --
I've read in the archives about DMA errors with the LP-PHY, but there didn't
seem to be any conclusion. Any guidance on what I can test to get it working?
It's reproducable on my Lenovo G530 laptop. (Yes, I know forcing PIO works for
others, and it works for me too, but I'd like to help testing if I can).
Any guidance on which tests would be most likely to work? AFAIK, options to
test include:
* 64bit kernel (and userland?)
* Hack b43/dma.c to force fallback to 32bit DMA (as a trial datapoint only)
* Boot with Mem=2G. Currently 4G ram is installed.
* Firmware 5xx
Or is this a HW design error in the laptop, and I should just live with forcing
PIO?
My system details:
* Compat-wireless-2009-09-30 (and also back to 9-21)
* Fedora Rawhide 32-bit, kernel 2.6.31.1-56.fc12.i686
* Firmware 478.104
* Fatal DMA error soon after heavy traffic starts
dmesg extract:
ssb: Sonics Silicon Backplane found on PCI device 0000:04:00.0
b43-phy0: Broadcom 4312 WLAN found (core revision 15)
b43-phy0 debug: Found PHY: Analog 6, Type 5, Revision 1
b43-phy0 debug: Found Radio: Manuf 0x17F, Version 0x2062, Revision 2
phy0: Selected rate control algorithm 'minstrel'
Registered led device: b43-phy0::tx
Registered led device: b43-phy0::rx
Registered led device: b43-phy0::radio
Broadcom 43xx driver loaded [ Features: PML, Firmware-ID: FW13 ]
b43 ssb0:0: firmware: requesting b43/ucode15.fw
cfg80211: Calling CRDA for country: US
cfg80211: Regulatory domain changed to country: US
(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
(2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
(5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
(5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
(5490000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
(5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
b43 ssb0:0: firmware: requesting b43/lp0initvals15.fw
b43 ssb0:0: firmware: requesting b43/lp0bsinitvals15.fw
b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
b43-phy0 debug: b2062: Using crystal tab entry 19200 kHz.
b43-phy0 debug: RC calib: Failed to switch to channel 7, error = -5
b43-phy0 debug: Chip initialized
b43-phy0 debug: 64-bit DMA initialized
b43-phy0 debug: QoS enabled
b43-phy0 debug: Wireless interface started
b43-phy0 debug: Adding Interface type 2
ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: deauthenticating from 00:0c:41:e2:f9:81 by local choice (reason=3)
wlan0: direct probe to AP 00:0c:41:e2:f9:81 (try 1)
wlan0: direct probe responded
wlan0: authenticate with AP 00:0c:41:e2:f9:81 (try 1)
wlan0: authenticated
wlan0: associate with AP 00:0c:41:e2:f9:81 (try 1)
wlan0: RX AssocResp from 00:0c:41:e2:f9:81 (capab=0x411 status=0 aid=2)
wlan0: associated
ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
b43-phy0 debug: Using hardware based encryption for keyidx: 0, mac:
ff:ff:ff:ff:ff:ff
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
wlan0: no IPv6 routers present
CE: hpet increasing min_delta_ns to 15000 nsec
b43-phy0 ERROR: Fatal DMA error: 0x00000000, 0x00000400, 0x00000000,
0x00000000,
0x00000000, 0x00000000
b43-phy0: Controller RESET (DMA error) ...
b43-phy0 debug: Wireless interface stopped
b43-phy0 debug: DMA-64 rx_ring: Used slots 8/64, Failed frames 0/0 = 0.0%,
Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_BK: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_BE: Used slots 256/256, Failed frames 0/7742
=
0.0%, Average tries 1.37
b43-phy0 debug: DMA-64 tx_ring_AC_VI: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_VO: Used slots 2/256, Failed frames 0/555 =
0.0%, Average tries 1.01
b43-phy0 debug: DMA-64 tx_ring_mcast: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
b43-phy0 debug: b2062: Using crystal tab entry 19200 kHz.
b43-phy0 debug: Chip initialized
b43-phy0 debug: 64-bit DMA initialized
b43-phy0 debug: QoS enabled
b43-phy0 debug: Wireless interface started
b43-phy0: Controller restarted
b43-phy0 ERROR: Fatal DMA error: 0x00000400, 0x00000000, 0x00000000,
0x00000000,
0x00000000, 0x00000000
b43-phy0: Controller RESET (DMA error) ...
b43-phy0 debug: Wireless interface stopped
b43-phy0 debug: DMA-64 rx_ring: Used slots 0/64, Failed frames 0/0 = 0.0%,
Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_BK: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_BE: Used slots 1/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_VI: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_VO: Used slots 2/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_mcast: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
b43-phy0 debug: b2062: Using crystal tab entry 19200 kHz.
b43-phy0 debug: Chip initialized
b43-phy0 debug: 64-bit DMA initialized
b43-phy0 debug: QoS enabled
b43-phy0 debug: Wireless interface started
b43-phy0: Controller restarted
b43-phy0 ERROR: Fatal DMA error: 0x00000400, 0x00000000, 0x00000000,
0x00000000,
0x00000000, 0x00000000
b43-phy0: Controller RESET (DMA error) ...
b43-phy0 debug: Wireless interface stopped
b43-phy0 debug: DMA-64 rx_ring: Used slots 0/64, Failed frames 0/0 = 0.0%,
Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_BK: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_BE: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_VI: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_AC_VO: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0 debug: DMA-64 tx_ring_mcast: Used slots 0/256, Failed frames 0/0 =
0.0%, Average tries 0.00
b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
b43-phy0 debug: b2062: Using crystal tab entry 19200 kHz.
b43-phy0 debug: Chip initialized
b43-phy0 debug: 64-bit DMA initialized
b43-phy0 debug: QoS enabled
etc etc.
regards, .............. Charlie
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