Re: Promise SATA driver GPL'd

[Jeff Garzik]

Matthias Andree wrote:
> On Tue, 26 Aug 2003, Jeff Garzik wrote:
>
>
> > For the future, I'm currently whipping the libata internals into shape 
> > so that Promise may be supported.  Promise hardware supports native 
> > command queueing, a lot like many SCSI adapters.
>
>
> Is that true even for the older stuff such as a PDC20265?

PATA stuff will continue to be supported via drivers/ide, I'm only 
shooting for the newer SATA stuff.


> It appears that FreeBSD 4-STABLE blacklists some older (before-TX2)
> Promise chips because they apparently lock up when used with tagged
> command queueing. I haven't yet looked at the ATAng driver merged into
> FreeBSD 5-CURRENT.


ATA tagged command queueing is a bunch of crap.  :)  I'm not sure 
whether I want to implement it or not.

I was referring to _native_ command queueing.  ATA TCQ is something 
different.  ATA TCQ does not allow multiple outstanding scatter/gather 
tables to be sent to the host controller.   Native command queuing does.

	Jeff



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/