Help! Can i use the system dma controller?

  • Thread starter Thread starter Altman_Scxr
  • Start date Start date
A

Altman_Scxr

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I have written a WDM driver for my lagacy PCIe device. I want to use the way of DMA to transfer data, but my device have not DMA controller. I see the DDK that introduce how to use the system DMA. I try to get the system DMA adapter by IoGetDmaAdapter function, but it always return NULL. so my problem is whether the system dma can be use? if the system dma can be used, how should I initialize the DEVICE_DESCRIPTION struct for this condition?

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