Messages in this thread | | | Subject | Re: DMA API issues | From | James Bottomley <> | Date | 20 Jun 2004 14:27:01 -0500 |
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On Sun, 2004-06-20 at 13:02, Oliver Neukum wrote: > > The DMA API is about allowing devices to transact directly with memory > > behind the memory controller, it's an API that essentially allows the > > I/O controller and memory controller to communicate without CPU > > intervention. This is still possible through the hypervisor, so the > > iSeries currently fully implements the DMA API. > > Then what's the problem?
If you look at the diagram, you'll see that the OHCI memory isn't behind the memory controller...
James
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