I am writing a pci wdm driver that communicate with pci and transfer data using dma transfer as a master (the pci card has dma chip on it)
I have writen primary driver that transfer a little ammount of data (not exceeded one page of memory) by direct communication with the dma chip and it works successfully. But when the data become larger than the one page of memory the problem of contigous memory appears.
so I need a method to force the memory to be contigouse.
note: The buffers where the data must be transfered must come from the application ( speed issue - no copymemoy).
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