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Re: kern/37884: nvidia ehci umass
The following reply was made to PR kern/37884; it has been noted by GNATS.
From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, kern-bug-people%NetBSD.org@localhost,
Subject: Re: kern/37884: nvidia ehci umass
Date: Mon, 28 Jan 2008 01:43:46 +0900
> > 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
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