Hi, On Sat, Aug 18, 2012 at 06:40:56AM +1000, Benjamin Herrenschmidt wrote: > > The problem I have is that b43 driver (wireless chip) insists a 30-bit > > DMA mask, but I have 1.5 GB physical memory. So the only way I can get > > the wireless connection to work is to boot with "mem=1024MB". And as a > > result my bloaty applications will loose much needed memory... > > Or force the iommu to be enabled, it should be able to service > constrained DMA (iommu=force on the command line).
I still get the same failure: DART IOMMU initialized for U3 type chipset [...] Kernel command line: ramdisk_size=8192 iommu=force [...] Top of RAM: 0x60000000, Total RAM: 0x60000000 Memory hole size: 0MB Zone ranges: DMA [mem 0x00000000-0x5fffffff] Normal empty [...] b43-pci-bridge 0001:01:01.0: Warning: IOMMU window too big for device mask b43-pci-bridge 0001:01:01.0: mask: 0x3fffffff, table end: 0x80000000 b43-phy0 ERROR: The machine/kernel does not support the required 30-bit DMA mask A. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
