[PATCH v4 0/4] Support for specifying extra IOMMU mappings for PCI

[laurentiu.tudor at nxp.com]

From: Laurentiu Tudor <laurentiu.tudor at nxp.com>

In the current implementation, u-boot creates iommu mappings only
for PCI devices enumarated at boot time thus does not take into
account more dynamic scenarios such as SR-IOV or PCI hot-plug.
Add support for specifying extra IOMMU mappings for PCI
controllers through a special env var called "pci_iommu_extra" or
through a device tree property named "pci-iommu-extra" placed in
the node describing the PCI controller. More detailed information
can be found in the final patch.

Changes in v5:
 - dropped useless NULL check for variable 'compat' in patch 2

Changes in v4:
 - rebased
 - fixed compilation issue on ls1021a based boards

Changes in v3:
 - rebased
 - trimmed commit message of the last patch
 - minor adjustments to the readme file

Changes in v2:
 - add ARI support and use it by default
 - option to disable ARI
 - fixes in BDF calculation
 - reorganized code a bit
 - added more comments

Laurentiu Tudor (4):
  pci: layerscape: move per-pci device fdt fixup in a function
  pci: layerscape: move pci node search in a common function
  pci: add a few ARI related defines
  pci: layerscape: add a way of specifying additional iommu mappings

 .../fsl-layerscape/doc/README.pci_iommu_extra |  67 +++
 drivers/pci/Kconfig                           |  12 +
 drivers/pci/pcie_layerscape_fixup.c           | 460 +++++++++++++++---
 include/pci.h                                 |   6 +
 4 files changed, 480 insertions(+), 65 deletions(-)
 create mode 100644 arch/arm/cpu/armv8/fsl-layerscape/doc/README.pci_iommu_extra

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2.17.1