Daniel J Blueman wrote:
On 02/08/07, Tejun Heo <htejun@xxxxxxxxx> 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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