PCI/P2PDMA: Store mapping method in an xarray

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When upstream_bridge_distance() is called, store the method required to map
the DMA transfers in an xarray so it can be looked up efficiently on the
hot path in pci_p2pdma_map_sg().

Link: https://lore.kernel.org/r/20190730163545.4915-12-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-12-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

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Logan Gunthorpe 2019-08-12 11:30:45 -06:00 • committed by Bjorn Helgaas

parent 142c242e6f

commit 110203bee0

1 changed files with 16 additions and 1 deletions

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drivers/pci/p2pdma.c

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