linux-kernel - [PATCH v3 0/4] Add system mmu support for Armada-806

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Date:   Thu,  2 Jul 2020 22:16:29 +0200
From:   Tomasz Nowicki <tn@...ihalf.com>
To:     will@...nel.org, robin.murphy@....com, joro@...tes.org,
        gregory.clement@...tlin.com, robh+dt@...nel.org, hannah@...vell.com
Cc:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        devicetree@...r.kernel.org, catalin.marinas@....com,
        nadavh@...vell.com, linux-arm-kernel@...ts.infradead.org,
        mw@...ihalf.com, Tomasz Nowicki <tn@...ihalf.com>
Subject: [PATCH v3 0/4] Add system mmu support for Armada-806

There were already two versions of series to support SMMU for AP806,
including workaround for accessing ARM SMMU 64bit registers.
First [1] by Hanna Hawa and second [2] by Gregory CLEMENT.
Since it got stuck this is yet another try. I incorporated the V2 comments,
mainly by moving workaround code to arm-smmu-impl.c as requested.

For the record, AP-806 can't access SMMU registers with 64bit width,
this patches split the readq/writeq into two 32bit accesses instead
and update DT bindings.

The series was successfully tested on a vanilla v5.8-rc3 kernel and
Intel e1000e PCIe NIC. The same for platform devices like SATA and USB.

[1]: https://lkml.org/lkml/2018/10/15/373
[2]: https://lkml.org/lkml/2019/7/11/426

Hanna Hawa (1):
  iommu/arm-smmu: Workaround for Marvell Armada-AP806 SoC erratum
    #582743

Marcin Wojtas (1):
  arm64: dts: marvell: add SMMU support

Tomasz Nowicki (2):
  iommu/arm-smmu: Add SMMU ID2 register fixup hook
  dt-bindings: arm-smmu: add compatible string for Marvell Armada-AP806
    SMMU-500

 Documentation/arm64/silicon-errata.rst        |  3 ++
 .../devicetree/bindings/iommu/arm,smmu.yaml   |  5 ++
 arch/arm64/boot/dts/marvell/armada-8040.dtsi  | 36 +++++++++++++
 arch/arm64/boot/dts/marvell/armada-ap80x.dtsi | 17 ++++++
 drivers/iommu/arm-smmu-impl.c                 | 52 +++++++++++++++++++
 drivers/iommu/arm-smmu.c                      |  3 ++
 drivers/iommu/arm-smmu.h                      |  1 +
 7 files changed, 117 insertions(+)

-- 
2.17.1