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Subject: Re: Query: No IDE DMA for IBM 365X with PIIX chipset?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Grant Coady <gcoady.lk@gmail.com>
Cc: linux-kernel@vger.kernel.org
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References: <j9bi729h2u4dcn9da7na3t1d8ckk477d9b@4ax.com>
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Date: Thu, 01 Jun 2006 14:50:12 +0100
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On Sul, 2006-05-28 at 15:29 +1000, Grant Coady wrote:
> PIIXa: chipset revision 2
> PIIXa: not 100% native mode: will probe irqs later
> PIIXa: neither IDE port enabled (BIOS)

It thinks the chip has not been activated, and then falls back to the
legacy driver. Could be incorrect enable checks or other problems.

> 00:01.0 ISA bridge: Intel Corporation 82371FB PIIX ISA [Triton I] (rev 02)
>         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
>         Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
>         Latency: 0
> 00: 86 80 2e 12 07 00 80 02 02 00 01 06 00 00 00 00
> 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

82371FB, whee thats prehistoric 8)

I don't actually have any support for the 371FB PIIX in either driver as
I've not been able to find a source for the data sheet to the chip. It
may work if added to the drivers/scsi/pata_oldpiix identifiers in the
2.6.17rc5-mm kernel. Would be useful to know as I don't know anyone else
with that chip any more 8)

Alan