Messages in this thread | | | Date | Fri, 15 Feb 2008 15:53:32 +0000 | From | Alan Cox <> | Subject | Re: [PATCH] libata: Add MMIO support to pata_sil680 |
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> > That's strange though. Somebody with knowledge of that HW (or specs) who > > can spot something ? Could it be an issue with timing ? > > > > I don't have HW access to this machine. If somebody could send one to me > > I could do more investigation. > > Ben, would an ssh access to such a machine and to a terminal server > suffice?
It says clearly in the code where to start. See the FIXME notes in both libata-sff and libata-core about MMIO. Neither the DMA transfer start or the probe SRST sequence are correct with MMIO posting and this hasn't been fixed as I pointed out was needed when I originally NAKked the change.
Without those being fixed (especially SRST) on any device with heavy PCI posting of mmio your controller *wont work*.
Alan
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