iommu/arm-smmu: Add support for PRR bit setup

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Add an adreno-smmu-priv interface for drm/msm to call into arm-smmu-qcom
and initiate the "Partially Resident Region" (PRR) bit setup or reset
sequence as per request.

This will be used by GPU to setup the PRR bit and related configuration
registers through adreno-smmu private interface instead of directly
poking the smmu hardware.

Suggested-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Bibek Kumar Patro <quic_bibekkum@quicinc.com>
Link: https://lore.kernel.org/r/20241212151402.159102-4-quic_bibekkum@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>

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Bibek Kumar Patro 2024-12-12 20:44:00 +05:30 • committed by Will Deacon

parent 445d7a8ed9

commit 7f2ef1bfc7

3 changed files with 61 additions and 0 deletions

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52

drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c

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2

drivers/iommu/arm/arm-smmu/arm-smmu.h

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7

include/linux/adreno-smmu-priv.h

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