Messages in this thread | | | From | Benjamin Herrenschmidt <> | Subject | Re: PCI DMA to small buffers on cache-incoherent arch | Date | Wed, 12 Jun 2002 17:00:20 +0200 |
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> Those would be designed so they could be shared between > devices, invisibly to code talking to a struct device. > > Example: all USB devices connected to a given bus would > normally delegate to the PCI device underlying that bus. > (Except for non-PCI host controllers, of course!) > > And the PCI versions of those methods have rather obvious > implementations ... :)
Yup. The simplest way I see here is to have a device automatically inherit, by default, his parent device ones. The arch will provide default "root" allocators, so a fully coherent or fully non-coherent arch may not have to do anything but these.
Now, if a given bus in the arch need specific quirks, it's up to the bus device node to put it's own versions to be used by it's childs.
Ben.
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