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

Jeff Garzik
2006-03-15T22:50:43Z

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