Re: Adaptec 2010S i2o + x86_64 doesn't work

[Markus Lidel <Markus.Lidel@shadowconnect.com>]

Hello,

Arjan van de Ven wrote:
> On Fri, 2005-04-15 at 20:10 +0200, Markus Lidel wrote:
> > Alan Cox wrote:
> > > On Gwe, 2005-04-15 at 17:15, Miquel van Smoorenburg wrote:
> > > > However, I removed 2 GB from the box as Alan sugggested and now the box
> > > > comes up just fine with a 64-bit 2.6.11.6 kernel! I've put the 4GB back,
> > > > and booted with the kernel "mem=2048" command line option - that also
> > > > works, the i2o_block driver sees the adaptec controller just fine.
> > > > And I just booted it with "mem=3840M" and that works too.
> > > > So the problem appears to be 4 GB memory in 64 bit mode, on this box.
> > > Or the driver is incorrectly handling 64/32bit DMA limit masks which
> > > would be my first guess here, and would explain why it works on AMD
> > > Athlon64 boxes.
> > Hmmm, i only set DMA_32BIT_MASK and don't do anything special on 64-bit 
> > systems... Is there anything else to do for correct DMA mapping?
> are you sure the HW isn't 31 bit by accident ? 

I don't know :-( But if the controller could only handle 31-bit DMA, 
wouldn't the 32-bit kernel with 4 GB also have the same problems?



Best regards,


Markus Lidel
------------------------------------------
Markus Lidel (Senior IT Consultant)

Shadow Connect GmbH
Carl-Reisch-Weg 12
D-86381 Krumbach
Germany

Phone:  +49 82 82/99 51-0
Fax:    +49 82 82/99 51-11

E-Mail: Markus.Lidel@shadowconnect.com
URL:    http://www.shadowconnect.com
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