Re: bus_dmamap_sync() for USB

[Michael Lorenz <macallan%netbsd.org@localhost>]

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Hello,

On Jun 23, 2008, at 12:20, Manuel Bouyer wrote:

> attached is a patch that adds bus_dmamap_sync() calls for uhci,  
> ohci and ehci.
> I've tested uhci and ehci on amd64 (both intel and add-on VIA ehci)  
> and
> sgimips (add-on VIA ehci). ohci has been tested on amd64 and macppc
> (both with the build-in USB controller). All tests have been done with
> USB keyboard/mouse, USB umass key and umodem. This patch, along  
> with the
> one in PR port-i386/38935, fix the race condition that cause
> "host controller process error" and "host controller halted" errors  
> when
> umodem@uhci is under heavy use.
>
> Michael Lorenz reported issues with this on uhci/ehci in a sgimips O2,
> but I couldn't reproduce it. It may be an issue with his add-on  
> adapter.

I see the same problems with an ohci/ehci card equipped with a NEC  
chip which works perfectly fine on macppc and sparc64, so I guess the  
problem is sgimips-specific. Since you don't see it I better look for  
local hacks in my source tree :/
The funny thing is that I only have problems with USB cards, an ex  
and the onboard ahc's Just Work.

have fun
Michael

> If noone object I'll commit this in the next few days.
>
> --
> Manuel Bouyer, LIP6, Universite Paris VI.            
> Manuel.Bouyer%lip6.fr@localhost
>      NetBSD: 26 ans d'experience feront toujours la difference
> --<diff>

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