Re: (reposting) how to get DMA'able memory within 4GB on 64-bit machi ne

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MEHTA,HIREN (A-SanJose,ex1) writes:
> Is there a way for a driver to ask kernel to
> give DMA'able memory within 4GB ? I read about
> pci_alloc_consistent(). But I could not find out
> whether that guarantees the DMA'able memory to be
> within 4GB or not. Is there any other kernel routine
> that I should call from Driver to get such a memory ?

All of the pci_*() DMA allocation/mapping interfaces give you
32-bit PCI dma addresses.

Later,
David S. Miller
davem@redhat.com
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