Messages in this thread | | | Date | Fri, 1 Sep 2006 11:16:58 -0700 | From | Greg KH <> | Subject | Re: [RFC] Simple userspace interface for PCI drivers |
| |
On Thu, Aug 31, 2006 at 03:49:10PM +0200, Andi Kleen wrote: > 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.
That sounds very reasonable, looking forward to it.
thanks,
greg k-h - 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/
| |