[0/7] iommu: dart: Apple t8110 DART support

Message

Hector Martin Jan. 4, 2023, 11 a.m. UTC

Hi all,

This series adds support for the T8110 DARTs used for the Thunderbolt
controllers on T600x SoCs and everywhere on T8112 SoCs.

This new DART revision shuffles the registers around and removes
support for multiple TTBR registers per SID (which never made sense on
16K configurations), but otherwise works much like the existing DART
hardware. The pagetable format is the same as t600x, so no changes are
needed there.

Once reviewed, I'd like to merge patch #1 through the Asahi-SoC tree so
we can start using it in device trees right away, instead of waiting for
one release cycle. Patches #2 onwards should go through the IOMMU tree.

Hector Martin (7):
  dt-bindings: iommu: dart: add t8110 compatible
  iommu: dart: Add suspend/resume support
  iommu: dart: Support >64 stream IDs
  iommu: dart: Support a variable number of TTBRs per stream
  iommu: dart: Fix DART_PARAMS1/2 bit define names
  iommu: dart: Support different variants with different registers
  iommu: dart: Add t8110 DART support

 .../devicetree/bindings/iommu/apple,dart.yaml |   1 +
 drivers/iommu/apple-dart.c                    | 559 ++++++++++++++----
 2 files changed, 450 insertions(+), 110 deletions(-)