On Fri, Jul 01, 2005 at 03:02:11PM -0400, Richard B. Johnson wrote:
> The driver (whatever that is), if it was written for a 64-bit
> platform, can write a 64-bit word in one operation and it's
> transparent. If the driver was written for a 32-bit environment,
> it will still work because there is compatibility with PCI 2.x
>
> FYI, this machine has a PCI-X bus. I have some 32-bit cards
> plugged into it (SCSI controller, etc.). They work. I also
> have a 64-bit card plugged into it (fiber-optic data link).
> It also works, but at 133 MHz. Software never talks to it
> in 'long longs' so the increased data-width isn't being used.
Are you sure about that? I'd assume when doing busmastering, it'll use
64-bit transfers, if the driver sets the correct DMA mask.
--
Vojtech Pavlik
SuSE Labs, SuSE CR
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