Re: kern/37884: nvidia ehci umass

[Martin Husemann <martin%duskware.de@localhost>]

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
> sys/dev/usb/TODO.

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.

Martin