Re: DMA API issues

[Jeff Garzik]

On Sun, Jun 20, 2004 at 04:50:42PM +0100, Ian Molton wrote:
> Those two statements are contradictory. clearly the iseries cant use the
> DMA API *now* so I dont see how that makes any difference. We're talking
> about adding propper support for *addresssable* memory mapped devices
> with limited size DMA-able windows to the DMA API, not adding support
> for a whole new weird way of talking to devices. These devices work the
> same way as all the other devices that use the DMA API but are simply
> restricted in the range of addresses they can DMA from. they require no
> special 'accessors'.
> 
> iseries cant work the usual way now and wont with these modifications -
> so nothing is made worse.

Are you purposefully ignoring James?

He is saying the DMA API must be uniform across all platforms.  Your
proposal 

1) breaks this

2) is unneeded, as many other drivers in this same situation simply use
ioremap

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