On Tue, Sep 17, 2002 at 02:24:35PM -0400, Waqar Ahmad wrote: > Found the problem I was using phys_to_virt(..) to convert the > physical address to virtual. Once I fixed that everything seems > to be working now. so
Anybody confused by this should read and understand Documentation/IO-mapping.txt. virt_to_phys/phys_to_virt and virt_to_bus/bus_to_virt are only defined for usage on system memory. This means statically mapped kernel memory. The only way to reliably (cross platform) get a physical address from pci_alloc_consistent is to hold on to your dma_handle. This has been covered a number of times on lkml with DavidM and might even be in the current DMA-mapping.txt by now...but I doubt it. :) Regards, -- Matt Porter porter at cox.net This is Linux Country. On a quiet night, you can hear Windows reboot. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
