PCI DMA support on the MPC8250

[Allen Curtis]

>But the DMA transfers are working and are 5 time faster. You must only program
>them. It is just 5 registers to configure. You buffers in RAM must be
>allocated with consistent_alloc to avoid caching on them and you must always
>write physical addresses in the DMA registers( use virt_to_phys).
>Note For  PCI addresses virt_to_phys doesn't work well. You must take the
>addresses from the "remap" function code. I did it and it works very well.

Do you have a patch for you DMA support?


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