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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: Martin Husemann <martin%duskware.de@localhost>
To: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
Cc: jmcneill%invisible.ca@localhost, gnats-bugs%NetBSD.org@localhost,
Subject: Re: kern/37884: nvidia ehci umass
Date: Sun, 27 Jan 2008 18:04:01 +0100
On Mon, Jan 28, 2008 at 01:43:46AM +0900, Izumi Tsutsui wrote:
> According to Microsoft KB925528, NVIDIA echi seems to have a bug
> which can't do DMA against memory higher than 2G physicall address.
Oh, great, that would explain it.
> 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
Yes, that sounds like the way to go. I have an affected machine but won't
come around to it within the next few weeks, so everyone is invited to
beat me to this.
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