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DMA chain structure using the WDF for continuous DMA RRS feed

  • Question

  • Hello.

    I have a WDM driver for a legacy PCI card that I am migrating to KMDF.

    The original driver creates a chain of DMA descriptors (0x40100 of them) where each descriptor points to a 256 byte chunk of a large buffer whose address is passed in an IOCTL call to the driver.  The application uses IOCTL calls to manage this chain.  The PCI card DMA's data while walking this chain. This is an old application (32 bit) that was built around this data structure for acquiring the data. 

    Is it possible to duplicate this arrangement with WDF calls?  If so, how?

    Thanks,

    Brian

    Wednesday, November 20, 2013 11:11 PM

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