Re: Query: No IDE DMA for IBM 365X with PIIX chipset?

[Mark Lord <lkml@rtr.ca>]

Grant Coady wrote:
> Hi there,
>
> Have an old Thinkpad 365X laptop that 'hdparm -i' tells me is 
> running mdma2 but it refuses to set dma mode.  2.6.16.18 also 
> refuses to set dma.
...

No luck with "hdparm -d1 /dev/hda" ??

> ...
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> PIIXa: IDE controller at PCI slot 00:01.0
> PIIXa: chipset revision 2
> PIIXa: not 100% native mode: will probe irqs later
> PIIXa: neither IDE port enabled (BIOS)
> hda: TOSHIBA MK6014MAP, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> hda: attached ide-disk driver.
> hda: host protected area => 1
> hda: 11733120 sectors (6007 MB), CHS=776/240/63
> Partition check:
>  hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7 hda8 >
...

Mmm.. there's a curious line: "PIIXa: neither IDE port enabled (BIOS)".
Can you enable DMA in the BIOS?  The IDE driver seems to be unwilling
to set up the bus-master DMA (BMDMA) portion of the chip unless
it was already initialized by the BIOS (paranoia, I suppose, or maybe a bug).

Cheers
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