Hi all, We (Anton Blanchard and others) have been trying to figure out the best (or any) way to allow for IOMMU bypass when setting up DMA mappings on particular devices. Our current idea is to hang a structure of pointers to DMA mapping operations off the struct device and inherit it from the device's parent. This would allow for per-bus (rather than per-bus_type) mapping operations and also allow a driver to override the bus's operations for a particular device. Does this make sense? Comments (hopefully consructive) please. Is there a better/simpler/more sensible way to do this? -- Cheers, Stephen Rothwell [email protected] http://www.canb.auug.org.au/~sfr/
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