On Thu, 2008-11-13 at 11:49 +0300, Yuri Tikhonov wrote: > Hello, > > This patch extends DMA ranges for PCI(X) to 4GB, so that it could > work on Katmais with 4GB RAM installed.
And where do you put MMIO ? The 32 bit part of the PCI space need to be split between MMIO and DMA. Ideally, for 64-bit capable DMA, device, we should create a second DMA range mapping the whole memory at something like 1T or so on PCI, and keep a smaller (ie. 2G) DMA range for 32-bit only devices backed with swiotlb. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
