On Mon, Jul 18, 2011 at 03:06:40PM -0600, Scott Long wrote:
> On Jul 18, 2011, at 12:02 PM, John Baldwin wrote:
> > On Friday, July 15, 2011 6:07:31 pm Mark McConnell wrote:
> >> Dear folks,
> >>
> >> I have two LSI raid cards, one of which (SCSI 320-I) supports
> >> 64-bit DMA when 4GB+ of DDR is present and another which
> >> does not (SATA 150-D) . Consquently I've disabled 64-bit
> >> addressing for amr devices.
> >>
> >> I would like to disable 64-bit addressing for the SATA card, but
> >> permit it for the SCSI card. Is this possible?
> >
> > You'd have to hack the driver perhaps to only disable 64-bit DMA for
> > certain
> > PCI IDs. It probably already does this?
> >
>
> The driver already had a table for determining 64bit DMA based on the PCI ID.
> I guess there's a mistake in the table for this particular card. I think
> that changing the following line to remove the AMR_ID_DO_SG64 flag will fix
> the problem:
>
> {0x1000, 0x1960, AMR_ID_QUARTZ | AMR_ID_DO_SG64 | AMR_ID_PROBE_SIG},
>
> Actually, what's probably going on is that the driver is only looking at the
> vendor and device id's, and is ignoring the subvendor and subdevice id's that
> would give it a better clue on the exact hardware in use. Fixing the driver
> to look at all 64bits of id info (and take into account wildcards where
> needed) would be a good project, if anyone is interested.
>
> Btw, I *HATE* the "chip" and "card" identifiers used in pciconf. Can we
> change it to emit the standard (sub)vendor/(sub)device terminology?
>
+1
> Scott
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