Messages in this thread |  | | Subject | Re: Question about ioremap and io_remap_page_range | From | (Jonathan Corbet) | Date | Thu, 27 Sep 2001 08:33:38 -0600 |
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> > VIRT_ADDR = ioremap(BUS_ADDR); to map a section of PCI memory, and > > X_ADDR = virt_to_phys(VIRT_ADDR); > > i'd suggest to read Documentation/DMA-mapping.txt in any recent kernel > source, the bus_to_virt()/virt_to_phys() interface is obsolete and has > been replaced by the pci_alloc_*/pci_map_*/pci_free_*() dynamic > DMA-mapping API.
...or, of course, _Linux_Device_Drivers_, Second Edition, available online at http://www.xml.com/ldd/chapter/book/index.html. The DMA chapter covers this API as well.
</self-promotion>
jon
Jonathan Corbet Executive editor, LWN.net corbet@lwn.net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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