Messages in this thread | | | Date | 18 Dec 2007 10:35:53 +0100 | Date | Tue, 18 Dec 2007 10:35:53 +0100 | From | Andi Kleen <> | Subject | Re: [RFC PATCH 08/12] PAT 64b: coherent mmap and sysfs bin ioctl |
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> Well the other alternative looks like having a second file per par > bar. Say resource0_wc to support the write-combining mode, possibly
The intention was to support memory not in bars, but give a generic IOMMU mapped memory interface for user space e.g. for the X server. But that needs a way to return the bus address for the mmap mapping and ioctl was the best I came up with for that. Given it was never finished.
-Andi
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