cvs commit: src/sys/dev/usb ehci.c ehci_pci.c ehcivar.h

[Juergen Lock]

On Thu, Feb 02, 2006 at 02:39:01AM +0000, Ian Dowse wrote:
> In message <20060201063254.GD678 at turion.vk2pj.dyndns.org>, Peter Jeremy writes:
> >On Tue, 2006-Jan-31 22:00:21 +0000, Ian Dowse wrote:
> >>In the case of USB, there is actually no need for it to perform
> >>large contiguous allocations because the host controllers all support
> >>some limited scatter-gather functionality so they can mostly access
> >>the caller's memory buffer directly via bus_dmamap_load(). This is
> >>something I implemented a year or to ago but I haven't got around
> >>to finishing the last few details of the patch yet.
> >
> >I'd looked into the specs far enough to determine that this was
> >possible but haven't looked at how difficult it would be to implement
> >it.  I think this is a preferable solution and would be interested in
> >helping you finish your patch.
> 
> I've updated
> 
> 	http://people.freebsd.org/~iedowse/usb.diff
> 
> with the latest patch I have. I think there are still one or two
> places where DMAADDR() calls have been replaced without all the
> necessary logic to handle programming segment information into the
> host controller descriptors (e.g. the "XXX, fixme" comment in
> ohci.c).
> 
> I only updated the OHCI interrupt transfer code and the sl811hs
> driver recently so there may be problems there, but most of the
> older changes have had a reasonable amount of testing as I've been
> using them on a low-memory soekris box for a couple of years.

Do you have a RELENG_5 version of that patch too? (And i guess others
would be interested in a RELENG_6 one as well? :)