I have had intermittent success using my PowerMac G5's Airport Extreme card, and it turns out it is because I've switched up how much RAM my system uses between installs (specifically from 512MB to 1.5GB).
When I type "ifconfig up", I get this message in my xterm: "SIOCSIFFLAGS: CANNOT ALLOCATE MEMORY". After I do a modprobe of bcm43xx, and I type "sudo dmesg" it says at the bottom of the list "[ 2154.224122] bcm43xx: >>>FATAL ERROR<<< DMA RINGMEMORY >1G (0x4adf5000, len: 4096)." Removing memory DOES fix it, which is what is so frustrating. I have dual 2.0 Ghz processors, each with 756mb of RAM = 1.5GB total. "DMA Engine Bugs The DMA Engine can only address memory below 1Gb, this seems to be a limitation of the Silicon Backplane used in the Broadcom 44xx chipsets as well. To get around this issue, try to ensure that all memory to be used for DMA is below 1G. In addition, when addressing any memory with the DMA engine, you will need to add 1<<30 to the address. It is believed that the top two bits are used for control, or internal routing, but their exact purpose is unknown." -http://bcm-specs.sipsolutions.net/DMA Apparently it's a DMA issue specific to Broadcom and the PPC Linux kernel people don't want to mess with the purity of the kernel just to fix it. Any chance you guys could give it a whirl or know how I can resolve this? Forgive my inexperience. I'm using Ubuntu Linux Dapper Flight 6, upgraded to the latest PPC 64 kernel. _______________________________________________ Bcm43xx-dev mailing list Bcm43xx-dev@lists.berlios.de http://lists.berlios.de/mailman/listinfo/bcm43xx-dev
