Re: 32-bit IO to-do item...

[Jeff Garzik <jeff@garzik.org>]

Alan Cox wrote:
>> I'd say pio-over-dma returns '1', so as to imply '0' meaning boring, 
>> slow, legacy compatible 16-bit I/O.  But it's a good question....
> 
> And 8bit transfers ?
> 
> The more I look at this the more I think we should just admit it was a
> dumb interface and do something different. To start with do we mean the
> controller-disk transfer is 32bit (meaningful only in some early proto
> IDE stuff), or the controller-fifo transfer is 32bit (which is
> meaningless as actually its posted)

Sure it's a dumb interface, it's a legacy ioctl...  :)  We do the best 
we can with a legacy interface.

On a more general level, sure, libata sorely lacks a control interface 
for twiddling host controller features, or even device xfer modes.

	Jeff