All,
The hardware design for which I am writing a Linux driver includes XAUI, DDR3 and is attached via a x8 PCI Express link. All this amounts to significantly high link bandwidths and I am worried about the ability of my driver and the OS to keep pace if I use the traditional methods of copying data from user-space to kernel-space and then setting it up for DMA. I have not ever used the direct I/O APIs. I understand these enable mapping user buffers to kernel address space ( get_user_pages() ) and the reverse - mapping kernel buffers to user address space ( mmap() ). However, I find the explanation in Rubini hard to follow, (especially for mmap()), and the sample drivers are slightly better. Looking for some advice on what are the robust, standard zero-copy options in Linux 2.6. Where can I get access to a good explanation of the steps to follow. I notice that even the Documentation folder does not have anything. Very appreciative of any suggestions. Regards, - priya This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately.
