Hi, I am writing PCI-X device driver. DPRAM is memory-mapped to PCI-X card. I want to use that memory as non-cacheable memory. ioremap_uncached() is to be used when device driver wants to write/read data from that memory-mapped DPRAM, using virtual address. But here, Data trasfer is done through PCI-X bus master. Let me know whether i have to do ioremap_uncached() for this DPRAM. DPRAM is used as buffer. One more query: Base address(physical address) of hardware register is stored at BAR-0 PCI-X configuration space. Can i use "virt_to_phys()" to get virtual address from this physical address. And can i use that virtual address for reading/writing/configuring registers ? Or I have to use request_mem_region() calls to allocate the memory and use it. Another query: I allocated kernel memory using kmalloc(). And then each pages of that memory is reserved using SetPageReserved() API call. Is this action equal to converting the memory to non-cacheable. kmalloc() ==> virt_to_page() ==> SetPageReserved() Pls let me know. 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/
