Re: libata/sata_nv latency on NVIDIA CK804 [was Re: AMD64 X2 lost ticks on PM timer]

[Jeff Garzik <jeff@garzik.org>]

Ingo Molnar wrote:
> * Jeff Garzik <jeff@garzik.org> wrote:
>
>
> > It won't work at all...
>
> ok.
>
>
> > You have to stop talking to PCI IDE registers completely (consumes 5 
> > PCI BARs), and talk exclusively to the MMIO 6th PCI BAR, at 
> > non-standard offsets and a using a proprietary DMA descriptor format 
> > [all public now in that link I just sent].
>
> just to make it easier to test: i've attached the new sata_nv.c file, 
> which, to test it, should be copied over the existing 
> drivers/scsi/sata_nv.c file, correct?
Alas, it is far from that simple :(

The code I linked to isn't in a working state.  NV contributed it 
largely as "it worked at one time" documentation of a 
previously-undocumented register interface.
Someone needs to debug it.

	Jeff



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