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
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