Re: kern/37884: nvidia ehci umass

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

jmcneill%invisible.ca@localhost wrote:

> > System: NetBSD wormulon.kollasch.net 4.99.31 NetBSD 4.99.31 (WORMULON) #27: 
> > Sat Jan 5 20:17:13 UTC 2008 
> > root%wormulon.kollasch.net@localhost:/usr/src/sys/arch/amd64/compile/WORMULON
> >  amd64
> 
> This is quite an old kernel. Can you please confirm that the issue is 
> still present with a 4.99.50 kernel?

Yes, the recent kernel still has the problem.

According to Microsoft KB925528, NVIDIA echi seems to have a bug
which can't do DMA against memory higher than 2G physicall address.

Maybe we could handle the quirk by MI bus_dmatag_subregion(9)
like if_bce.c, but the next problem is that ehci(4) driver
completely lacks bus_dmamap_sync(9) calls, as noted in
sys/dev/usb/TODO.

Any takers?
---
Izumi Tsutsui