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

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Ingo Molnar wrote:
* Jeff Garzik <[email protected]> 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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