I am developing a framegrabber driver. I need to map memory for the grabber to DMA the images into. I have it working currently where the grab happens into kernel memory and then I copy_to_user to get the buffer into user space. I think I can eliminate this step by using remap_page_range which would allow me to access the grabbed images directly from user space. The argument to remap_page_range that I don't understand is the first argument...the virtual address. I know how big the buffer is, I know the physical address of the buffer allocated in the kernel, I have to set the protection such that the pages are not swapped...how do I get a virtual address to pass to the driver so that this mapping can take place? TIA -- Best regards, David Stroupe Keyed-Up Software -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
