Altera's FPGA PCIe chaining DMA example IP core

Greg KH greg at
Thu Aug 28 16:36:47 UTC 2008

On Thu, Aug 28, 2008 at 05:21:08PM +0200, Leon Woestenberg wrote:
> Hello Greg, all,
> On Thu, Aug 28, 2008 at 5:35 AM, Greg KH <greg at> wrote:
> > On Mon, Aug 25, 2008 at 08:48:05PM +0200, Leon Woestenberg wrote:
> >> Hello Greg,
> >>
> >> could you spend some time giving out a project number for this:
> >
> > Sorry for the delay, you have number 0012.
> > If there's anything I can do to help out, please let me know.
> >
> Excellent!
> Currently we have read and write scatter/gather DMA sort-of working
> (one-time only, re-init fails), but still to cache-consistent memory
> and not using any of the scatter/gather interface offered by the
> kernel.
> No interrupts are used yet, we poll for completion. Next is fixing the
> re-issueing new DMAs, then enabling interrupt notification. Then make
> the SG buffer be of streaming type, and do proper syncing. Using pages
> mapped in user space is probably last, I think there is a new generic
> scatter/gather interface in the kernel-works for this?

Yes, I think there is, but you might need to check to be sure.

If you have _any_ code that so much as just compiles, send it to me for
inclusion in the -staging tree to get some good build testing.


greg k-h

More information about the prjmgr mailing list