[PATCH v3 0/6] Add support for Qualcomm's legacy IOMMU v2

From: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
To: agross@kernel.org
Cc: andersson@kernel.org, konrad.dybcio@linaro.org, joro@8bytes.org,
	will@kernel.org, robin.murphy@arm.com, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org, robdclark@gmail.com,
	linux-arm-msm@vger.kernel.org, iommu@lists.linux.dev,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	marijn.suijten@somainline.org, kernel@collabora.com,
	luca@z3ntu.xyz, a39.skl@gmail.com, phone-devel@vger.kernel.org,
	~postmarketos/upstreaming@lists.sr.ht,
	AngeloGioacchino Del Regno 
	<angelogioacchino.delregno@collabora.com>
Subject: [PATCH v3 0/6] Add support for Qualcomm's legacy IOMMU v2
Date: Tue, 15 Nov 2022 11:11:16 +0100	[thread overview]
Message-ID: <20221115101122.155440-1-angelogioacchino.delregno@collabora.com> (raw)

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 v3:
 - Removed useless FSRRESTORE reset and definition as pointed
   out in Robin Murphy's review
 - Fixed qcom,iommu.txt changes: squashed MSM8976 compatible
   string addition with msm-iommu-v2 generics addition

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 (6):
  dt-bindings: iommu: qcom,iommu: Document qcom,ctx-num property
  iommu/qcom: Use the asid read from device-tree if specified
  iommu/qcom: Properly reset the IOMMU context
  iommu/qcom: Index contexts by asid number to allow asid 0
  dt-bindings: iommu: qcom,iommu: Document QSMMUv2 and MSM8976
    compatibles
  iommu/qcom: Add support for QSMMUv2 and QSMMU-500 secured contexts

 .../devicetree/bindings/iommu/qcom,iommu.txt  |  9 +++
 drivers/iommu/arm/arm-smmu/qcom_iommu.c       | 78 +++++++++++++++----
 2 files changed, 70 insertions(+), 17 deletions(-)

-- 
2.38.1