I think this might help you.... See Chap.13 of Linux Device Drivers book (Rubini). http://www.xml.com/ldd/chapter/book/ Dom -----Original Message----- From: kernelnewbies-bounce@xxxxxxxxxxxx [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of jhoney jhoney Sent: Wednesday, October 13, 2004 8:36 AM To: kernelnewbies Subject: DMA through PCI Hello All, I have one requirement like, I have PCI Host and PCI Agent, the agent is sitting in the pci slot of the host .The Agent is ported with linux. Now I want DMA the data from HOST to AGENT by AGENT through pci. could u pls let me know where i have to search for the routines for DMA using PCI. Thanks in Advance Regards Jhoney -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/