how to load a file in memory for doing DMA transfer to Bus master DMA

i need to send a file to the ethernet card , thro DMA mode
i have an bus master ethernet card
soo how can i initiate the dma for the ethernet card???

and how do i load the file into memory
so tht i can directly give the address of the file to nic for DMA transfer

pls help :frowning: :frowning: