Summary

DMA is a feature that one finds in many modern CPUs. This chapter gives you the necessary steps to get the most out of this device, using the kernel DMA mapping and DMA engine APIs. After this chapter, I have no doubt you will be able to set up at least a memory-to-memory DMA transfer. One can find further information at Documentation/dmaengine/, in the kernel source tree. Therefore, the next chapter deals with an entirely different subject—the Linux device model.