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, .............. 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