[0/3] iommu: Add Allwinner H6 IOMMU driver

Message

Maxime Ripard Jan. 22, 2020, 12:44 p.m. UTC

Hi,

Here's a series adding support for the IOMMU introduced in the Allwinner
H6. The driver from Allwinner hints at more SoCs using it in the future
(with more masters), so we can bet on that IOMMU becoming pretty much
standard in new SoCs from Allwinner.

One thing I wasn't really sure about was how to expose the statistics
reported by the IOMMU PMU (TLB hit rates, latencies, and so on). The
Allwinner driver exposes them through custom sysfs files, while they would
be best represented through perf I guess? Anyway, I'm planning to support
them later on.

Let me know what you think,
Maxime

Maxime Ripard (3):
  dt-bindings: iommu: Add Allwinner H6 IOMMU bindings
  iommu: Add Allwinner H6 IOMMU driver
  arm64: dts: allwinner: h6: Add IOMMU

 Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml |   61 ++++-
 arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi                           |   11 +-
 drivers/iommu/Kconfig                                                  |   10 +-
 drivers/iommu/Makefile                                                 |    1 +-
 drivers/iommu/sun50i-iommu.c                                           | 1126 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 5 files changed, 1209 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml
 create mode 100644 drivers/iommu/sun50i-iommu.c

base-commit: e42617b825f8073569da76dc4510bfa019b1c35a