On Tue, Jan 22, 2019 at 02:30:45PM -0700, Logan Gunthorpe wrote: > Currently the Intel IOMMU uses the default dma_[un]map_resource() > implementations does nothing and simply returns the physical address > unmodified. > > However, this doesn't create the IOVA entries necessary for addresses > mapped this way to work when the IOMMU is enabled. Thus, when the > IOMMU is enabled, drivers relying on dma_map_resource() will trigger > DMAR errors. We see this when running ntb_transport with the IOMMU > enabled, DMA, and switchtec hardware. > > The implementation for intel_map_resource() is nearly identical to > intel_map_page(), we just have to re-create __intel_map_single(). > dma_unmap_resource() uses intel_unmap_page() directly as the > functions are identical. > > Signed-off-by: Logan Gunthorpe <log...@deltatee.com> > Cc: David Woodhouse <dw...@infradead.org> > Cc: Joerg Roedel <j...@8bytes.org>
Applied, thanks. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
