v2: second pass at refining the interface. Rolled pci_requester_id
into pci_get_visible_pcie_requester. Fixed some bus walk issues.
Another obscure issue that I forgot to mention that this should fix
is gaps in requester IDs. If you had:
---pcie--->[pcie2pci]---pci--->[pci2pcie]---pcie--->[endpoint]
I think the current code would try to use the endpoint requester id and
fail. This code will use the pcie2pci->secondary as the requester id.
This may not even be that obscure of a bug if a PCIe ASIC is soldered
to a pci2pcie bridge to make a compatible conventional PCI card.
The diffstat for pci improves a bit when we remove:
pci_find_upstream_pci_bridge:
drivers/iommu/intel-iommu.c | 164 ++++++++++-----------------
drivers/iommu/intel_irq_remapping.c | 2
drivers/pci/search.c | 215 +++++++++++++++++++++++++++++++-----
include/linux/pci.h | 16 +-
4 files changed, 260 insertions(+), 137 deletions(-)
Comments? Thanks,
Alex
---
Alex Williamson (2):
pci: Create PCIe requester ID interface
iommu/intel: Make use of PCIe requester ID interface
drivers/iommu/intel-iommu.c | 164 +++++++++++------------------
drivers/iommu/intel_irq_remapping.c | 2
drivers/pci/search.c | 198 +++++++++++++++++++++++++++++++++++
include/linux/pci.h | 7 +
4 files changed, 270 insertions(+), 101 deletions(-)
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