Merge branch 'pci/p2pdma'

Merge branch 'pci/p2pdma'

  - Move P2PCMA PCI bus offset from generic dev_pagemap to
    pci_p2pdma_pagemap (Logan Gunthorpe)

  - Add provider's pci_dev to pci_p2pdma_pagemap (Logan Gunthorpe)

  - Apply host bridge whitelist for ACS (Logan Gunthorpe)

  - Whitelist some Intel host bridges for P2PDMA (Logan Gunthorpe)

  - Add attrs to pci_p2pdma_map_sg() to match dma_map_sg() (Logan
    Gunthorpe)

  - Add pci_p2pdma_unmap_sg() (Logan Gunthorpe)

  - Store P2PDMA mapping method in xarray (Logan Gunthorpe)

  - Map requests that traverse a host bridge (Logan Gunthorpe)

  - Allow IOMMU for host bridge whitelist (Logan Gunthorpe)

* pci/p2pdma:
  PCI/P2PDMA: Update pci_p2pdma_distance_many() documentation
  PCI/P2PDMA: Allow IOMMU for host bridge whitelist
  PCI/P2PDMA: dma_map() requests that traverse the host bridge
  PCI/P2PDMA: Store mapping method in an xarray
  PCI/P2PDMA: Factor out __pci_p2pdma_map_sg()
  PCI/P2PDMA: Introduce pci_p2pdma_unmap_sg()
  PCI/P2PDMA: Add attrs argument to pci_p2pdma_map_sg()
  PCI/P2PDMA: Whitelist some Intel host bridges
  PCI/P2PDMA: Factor out host_bridge_whitelist()
  PCI/P2PDMA: Apply host bridge whitelist for ACS
  PCI/P2PDMA: Factor out __upstream_bridge_distance()
  PCI/P2PDMA: Add constants for map type results to upstream_bridge_distance()
  PCI/P2PDMA: Add provider's pci_dev to pci_p2pdma_pagemap struct
  PCI/P2PDMA: Introduce private pagemap structure