Re: ICH8 CF timeout (regression)...

[Mark Lord <lkml@rtr.ca>]

Daniel J Blueman wrote:
> On 02/08/07, Tejun Heo <htejun@gmail.com> wrote:
> > Daniel J Blueman wrote:
> > > I'll grab kernel logs from the legacy ATA boot; what else can help
> > > debug this issue? No problem testing patches too.
> > Yeap, please post the old log.
>
> Not much actually - perhaps I need to enable some debugging:
>
> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> hdc: SanDisk SDCFX-4096, CFA DISK drive
> ide1 at 0x170-0x177,0x376 on irq 15
> hdc: max request size: 128KiB
> hdc: 8027712 sectors (4110 MB) w/1KiB Cache, CHS=7964/16/63
>  hdc: hdc1 hdc2 hdc3
>
> > > --- [2]
> > > ata2.00: limiting speed to UDMA/33:PIO4
> > > ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> > > ata2.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 cdb 0x0 data 4096 in
> > >          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
> > > ata2: soft resetting port
> > > ata2.00: configured for UDMA/33
> > > ata2: EH complete
> > What happens after this?
>
> More EH occurs - I've left it for ~5 mins, but let me know if longer
> would give more information, eg if it converges on a lower speed.
>
> Would it be useful to compare some of the port setup registers in the
> working and non-working cases? Or any other debug I can grab?

I'm betting that this is the exact same problem we recently debugged
for someone else here:  there's a Marvell PATA->SATA bridge chip between
that CF card and the SATA controller, and it only works with PIO modes.

Tejun.. perhaps (for debugging) a simple patch to disallow DMA completely,
just to see if PIO works?

Cheers

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