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

[David S. Miller]

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
[e-mail]