> Hi, > > I am writing device driver (kernel 2.6 ) for PCI-X card. > > Pls clarify the following doubts: > 1. DPRAM is memory mapped to PCI-X card. > 2. I have to transfer data from main memory to DPRAM using bus master > concept and vice-versa. > 3. How to make this memory area as non-cacheable one ? > 4. Whether DMA mapping (pci_map_single() call ) should be done for both > DPRAM and main memory ? > 4.a) I will get the physical address of DPRAM memory (memory mapped to > PCI-X card) from BAR-0 register. Can i use this physical addres directly > for data transer using bus master (without pci_map_single() call.) ? > 4.b) How to make main memory area as non-cacheable one ? > > Regards, > Munees. > DISCLAIMER The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any mail and attachments please check them for viruses and defect. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
