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PowerMac G5, Airport

Hi again,

This is another old issue, been there probably since kernel 3...

Airport cannot be used, the relevant dmesg output is following:

[    8.093462] b43-phy0: Broadcom 4306 WLAN found (core revision 5)
[    8.189942] Registered led device: b43-phy0::tx
[    8.189990] Registered led device: b43-phy0::rx
[    8.190037] Registered led device: b43-phy0::radio
[   27.657785] b43 ssb0:0: firmware: agent loaded b43/ucode5.fw into memory
[   27.694619] b43 ssb0:0: firmware: agent loaded b43/pcm5.fw into memory
[   27.737501] b43 ssb0:0: firmware: agent loaded b43/b0g0initvals5.fw
into memory
[   27.764976] b43 ssb0:0: firmware: agent loaded
b43/b0g0bsinitvals5.fw into memory
[   27.876854] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[   27.936931] b43-pci-bridge 0001:05:01.0: Warning: IOMMU window too
big for device mask
[   27.937488] b43-pci-bridge 0001:05:01.0: mask: 0x3fffffff, table
end: 0x80000000
[   27.937995] b43-phy0 ERROR: The machine/kernel does not support the
required 30-bit DMA mask
[   29.056940] b43-phy0 ERROR: Microcode not responding

The key is the "required 30-bit DMA mask".

Looks like this happens only with more than 1 GB on RAM (see BTS #742555).

The machine is PowerMac7,3 (2x1.8 GHz) and the OS is up-to-date Wheezy (7.7).

Anyone else using Airport with this kind of machine?


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