Re: Promise SATA driver GPL'd

[Jeff Garzik <jgarzik@pobox.com>]

On Wed, Aug 13, 2003 at 03:34:37PM +0200, Vojtech Pavlik wrote:
> On Wed, Jul 23, 2003 at 11:32:11AM +0100, Alan Cox wrote:
> > On Mer, 2003-07-23 at 02:59, Andre Hedrick wrote:
> > > I have already cut all ties with Promise so here is the deal.
> > > I no longer have to count the number of fingers on my hand between hand
> > > shakes.  IE no extras and not shortages.
> > 
> > Thats ok - now they are doing GPL drivers themselves they don't need
> > you any more.
> > 
> > Promise did a SCSI CAM driver because their hardware can queue commands
> > without TCQ - which drivers/ide can't cope with. Otherwise I'd just have
> > used the same type of changes the FreeBSD people did for 2037x.
> > 
> > Its also interesting because it has a hardware XOR engine.
> 
> I don't think it does. The Promise SATA150 SX4 is the one that has the
> XOR engine (and the PDC20621 chip) and that one is not supported by the
> driver.

hmm, the method of delivering ATA and XOR packets on Promise hardware
are very, very similar.  And pdc-ultra driver seems to have code to
deliver XOR packets...

	Jeff