Re: [PATCH 0/9][RFC] stackable dma_ops for x86

[Jeremy Fitzhardinge]

Joerg Roedel wrote:
> Its implemented using the per-device dma-ops already there. With this
> patches there is a list of available dma_ops implementations which are
> asked in a particular order if they can handle the device. The first
> implementation which returns true is assigned to the device as the
> per-device dma_ops structure.
>
> (Hmm, maybe the name stackable is misleading, is "dma_ops multiplexing"
>  better?)

Is per-device the right level?  Wouldn't per-bus make more sense?  How
does a dma_ops implementation "know" whether it can handle a particular
device?

(I haven't had a chance to read the patches yet.)

    J
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