[v2,0/8] Add support for Qualcomm's legacy IOMMU v2

Message

AngeloGioacchino Del Regno Nov. 11, 2022, 2:59 p.m. UTC

This series adds support for handling "v2" firmware's IOMMU, found
on at least MSM8956 and MSM8976 (some other SoCs also need the same
but I honestly don't remember which ones precisely).

This is strictly required to get functional IOMMUs on these SoCs.

I'm sorry for not performing a much needed schema conversion on
qcom,iommu.txt, but I really didn't have time to do that :-(

This series was tested on Sony Xperia X and X Compact (MSM8956):
ADSP, LPASS, Venus, MSS, MDP and GPU are happy :-)

Changes in v2:
 - Added back Marijn's notes (sorry man!)
 - Added ARM_SMMU_CB_FSRRESTORE definition
 - Changed context bank reset to properly set FSR and FSRRESTORE

AngeloGioacchino Del Regno (8):
  dt-bindings: iommu: qcom,iommu: Document qcom,ctx-num property
  iommu/qcom: Use the asid read from device-tree if specified
  iommu/arm-smmu: Add definition for ARM_SMMU_CB_FSRRESTORE
  iommu/qcom: Properly reset the IOMMU context
  iommu/qcom: Index contexts by asid number to allow asid 0
  dt-bindings: iommu: qcom,iommu: Document QSMMU v2 compatibles
  iommu/qcom: Add support for QSMMUv2 and QSMMU-500 secured contexts
  dt-bindings: iommu: qcom,iommu: Document MSM8976 compatible

 .../devicetree/bindings/iommu/qcom,iommu.txt  | 11 ++-
 drivers/iommu/arm/arm-smmu/arm-smmu.h         |  1 +
 drivers/iommu/arm/arm-smmu/qcom_iommu.c       | 78 +++++++++++++++----
 3 files changed, 71 insertions(+), 19 deletions(-)