dma

1.dma硬件工作原理

以read disk为例，解释dma工作流程：

Chapter 6.1, Computer Systems A Programmers Perspective

 2.Linux DMA Engine framework

http://www.wowotech.net/linux_kenrel/dma_engine_overview.html
http://www.wowotech.net/linux_kenrel/dma_engine_api.html
http://www.wowotech.net/linux_kenrel/dma_controller_driver.html

http://www.wowotech.net/memory_management/DMA-Mapping-api.html

Reference

1.Computer Systems A Programmers Perspective

2. http://www.wowotech.net/linux_kenrel/dma_engine_overview.html
3. http://www.wowotech.net/linux_kenrel/dma_engine_api.html
3. http://www.wowotech.net/linux_kenrel/dma_controller_driver.html

4. http://www.wowotech.net/memory_management/DMA-Mapping-api.html