Messages in this thread |  | | | Date | Tue, 02 Oct 2007 19:23:10 -0400 | | From | Jeff Garzik <> | | Subject | Re: [regression] 2.6.23 sata_mv EH updates broke my 7042 controller |
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Olof Johansson wrote: > On Mon, Oct 01, 2007 at 06:37:44PM -0400, Jeff Garzik wrote: >> Olof Johansson wrote: >>> Hardware config in my case: >>> Highpoint 2310 controller >>> PPC (big endian) >>> WD Raptor disk >>> Works fine with the other controller I've been using (SIL24), and works >>> fine if I revert the driver. >>> It also works fine if I disable the IOMMU. This would point towards >>> either a stale dma mapping, or a missing setup of one. >>> Not being much at home in the SATA drivers I could keep digging but I >>> figured I'd bring it up first in case it rings a bell for someone. >> The IOMMU data point is certainly interesting. Nothing jumps out on a >> re-review of the patch, so keep digging and let us know ;-) > > Looks like it's caused by enabling vmerge (which tends to be on for the > common PPC defconfigs). If I disable it, things look OK. > > Perhaps the Marvell controller doesn't like requests larger than 64K, > or wrapping some boundary. Do you have access to erratas/docs? > > I have verified it on a powermac now as well (had a quick scare that it > might have been some problem with the PA Semi IOMMU, but no).
FWIW: I just tried the 6042 on my AMD64 platform with iommu=force, and was unable to reproduce any trouble.
You could try changing MV_DMA_BOUNDARY to 0xffffU and see what happens. I'll also look through my errata, to see what is different between 6042 and 7042, if anything.
Jeff
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