Re: sata_mv 7042 support and port multipliers

[Jeff Garzik <jgarzik@pobox.com>]

Robin H. Johnson wrote:
> Hi,
> 
> I recently picked up a new eSATA controller
> (http://www.sonnettech.com/product/tempo_sata_e4p.html), along with a
> port-multiplier enclosure (Fusion 500P from the same company) and a
> bunch of disks, since I was running out of space.
> 
> I added this to the table mv_pci_tbl[]:
> { PCI_VDEVICE(MARVELL, 0x7042), chip_7042 },
> 
> However, I see it doesn't quite work. 7042 support doesn't seem to have
> been touched or even mentioned since Jeff posted the 6042 changes in
> January.
> 
> The card reports as revision 2, which is not in the code either.
> 
> I've got the hardware, so I'm willing to do heavy lifting of code (NCQ,
> Hotplug, PMP) if it hasn't been done yet, if somebody point me to some
> docs on the matter.  I've seen the mvSata-3.6.1 driver, and it appears
> to have most of the stuff on revision 1, but nothing on hardware
> revision 2 either.
> 
> Jeff: you mentioned back in September about Marvell being a bit more
> generous with docs? Were 7042 docs amongst them or do I have to slog
> through the messy mvSata driver to find everything?


That's what I had to do.  I have the docs, which cover the programming 
interface, but it doesn't cover a lot of the associated errata.  I had 
to dig that out of the mvSata driver myself.

I had thought that Mark Lord was working on improving sata_mv, but 
outside of a locking bugfixes, I haven't seen anything since mid-May.

So I guess sata_mv is in limbo again...

	Jeff