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    SubjectRe: Can I/OAT DMA engineer access PCI MMIO space

    >> yes, I had used 'ioremap_nocache' to map the IO memory and I can use
    >> memcpy to copy data to this region. The async_tx should have been
    >> correctly configured as
    >> I can use aync_memcpy to copy data between different system memory address.
    > Then you should be using memcpy_toio() and friends
    Do you mean that if I have mapped the mmio, I can' use I/OAT dma
    transfer to this region any more?
    I can use memcpy to copy data, but it consumes lots of cpu as PCI access
    is too slow.
    If I can use i/oat dma and asyc_tx api to do the job, the performance
    should be imporved.

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      Last update: 2011-05-03 08:31    [W:0.023 / U:1.072 seconds]
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