nf-driver-dma

DMA driver and user api for NetFPGA

Memory map and dma

Linux Device Drivers, Third Edition chapter 15

Mapping physical memory to user space

How to access physical addresses from user space in Linux?

Usage

make

memmap will read physical address 0x2000

writemap will write (0,1,2...9)/(a ,9 ,8->1) to physical address 0x2000

Meanwhile, somehow trigger the driver to read from/write to that 0x2000 memory address instead of pci_single_map(skb).