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Matt Porter <mporter@embeddedalley.com> writes: > > What about portable access to the PCI DMA API from userspace? We'll definitely need this for X11 anyways. Currently it is not possible to run the standard X server with a IOMMU that isolates the graphics card because it has no way to get at the GPU MMIO registers then. My long-term plan was to integrate it in /sys/bus/pci mmaps (together with PAT etc.). When you mmap it there the kernel allocates a DMA mapping and then frees it on unmap. Then it should hopefully just work. -Andi - 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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