On Mon, Sep 1, 2008 at 9:37 PM, Mikael Pettersson <mikpe@xxxxxxxx> wrote:
> Mark Nelson writes:
> > On Sat, Aug 23, 2008 at 9:59 PM, Mikael Pettersson <mikpe@xxxxxxxx> wrote:
> > > Mark Nelson writes:
> > > > > > Forgive my ignorance, but does the fact that the T3 controller can also
> > > > > > use SAS disks mean we should be looking for a SCSI driver?
> > > > >
> > > > > Promise lists only this one partial-source driver for the tx4650,
> > > > > and it /is/ a Linux scsi driver.
> > > > >
> > > >
> > > > Oh sorry, I meant to ask should we be looking at an in-kernel
> > > > (or fully open source driver) that is a SCSI driver that we could make
> > > > work with the T3? So maybe my question is actually: does the
> > > > fact that this controller supports SAS disks mean that the
> > > > driver for it should be a scsi driver (rather than an ATA driver)?
> > >
> > > The candidate Linux drivers would be ata/sata_promise, ata/sata_sx4,
> > > block/sx8, and scsi/stex. You tried sata_promise, and from looking
> > > at the PCI IDs I doubt the others are likely to drive the T3.
> > >
> > > If you can find an open-source T3 driver in some other operating
> > > system, like OpenSolaris, Darwin, or some *BSD, then that would be
> > > great.
> > >
> >
> > Okay, so after trying all of the above drivers you suggested (as
> > well as a few other SAS drivers I found) I figured I'd try AHCI.
> >
> > And it actually works!
> >
> > After making the following simple change:
> >
> > --- linux/drivers/ata/ahci.c_orig 2008-09-01 18:42:26.000000000 +1000
> > +++ linux/drivers/ata/ahci.c 2008-09-01 19:41:29.000000000 +1000
> > @@ -542,6 +542,9 @@ static const struct pci_device_id ahci_p
> > { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
> > { PCI_VDEVICE(MARVELL, 0x6121), board_ahci_mv }, /* 6121 */
> >
> > + /* Promise */
> > + { PCI_VDEVICE(PROMISE, 0x3f20), board_ahci }, /* T3 */
> > +
> > /* Generic, PCI class code for AHCI */
> > { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
> > PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
>
> Nice detective work. At least now the chip is usable.
>
> /Mikael
>
Thanks! It still might need a bit of tweaking and input from
the ahci guys but I'm really happy now that I can use those
extra ports.
Mark
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