Re: VIA SATA not recognizing drives

[Jeff Garzik <jgarzik@pobox.com>]

Marc Singer wrote:
> On Sat, May 08, 2004 at 05:29:10PM -0400, Jeff Garzik wrote:
> 
>>Marc Singer wrote:
>>
>>> libata version 1.02 loaded.
>>> sata_via version 0.20
>>> sata_via(0000:00:0f.0): routed to hard irq line 10
>>> ata1: SATA max UDMA/133 cmd 0xEC00 ctl 0xE802 bmdma 0xDC00 irq 10
>>> ata2: SATA max UDMA/133 cmd 0xE400 ctl 0xE002 bmdma 0xDC08 irq 10
>>> ata1: no device found (phy stat 00000000)
>>> ata1: thread exiting
>>> scsi0 : sata_via
>>> ata2: no device found (phy stat 00000000)
>>> ata2: thread exiting
>>> scsi1 : sata_via
>>
>>
>>Those "phy stat 00000000" are the hardware saying there is no SATA 
>>device attached.
>>
>>Are you sure you plugged them into the VIA SATA ports?  Maybe you have a 
>>Promise chip on-board too, or something like that?  Or SATA is disabled 
>>in BIOS?
> 
> 
> I'm embarassed to say, though not too proud to admit, that the power
> cables weren't properly seated.  It's working just fine.
> 
> I have another question, though.  I've patched the ide driver to
> permit an IDE interface to operate without an IRQ.  It needs a little
> bit of tweaking before it will be accepted by that IDE maintainer.
> Are you planning to subsume all of the IDE functionality into libata
> that is handled by the other IDE driver?  If so, have you considered
> adding polling mode?


PIO code in libata operates exclusively in polling mode.

I'm not too confident of polling DMA being a good idea.

	Jeff