Re: [PATCH v3 12/14] PCI/P2PDMA: dma_map() requests that traverse the host bridge
From: Christoph Hellwig
Date: Fri Aug 16 2019 - 04:15:53 EST
On Mon, Aug 12, 2019 at 11:30:46AM -0600, Logan Gunthorpe wrote:
> Any requests that traverse the host bridge will need to be mapped into the
> IOMMU, so call dma_map_sg() inside pci_p2pdma_map_sg() when appropriate.
> Similarly, call dma_unmap_sg() inside pci_p2pdma_unmap_sg().
> Link: https://lore.kernel.org/r/20190730163545.4915-13-logang@xxxxxxxxxxxx
> Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
> Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>