iommu/arm-smmu-v3: Add arm_smmu_strtab_l1/2_idx()

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Don't open code the calculations of the indexes for each level, provide
two functions to do that math and call them in all the places. Update all
the places computing indexes.

Calculate the L1 table size directly based on the max required index from
the cap. Remove STRTAB_L1_SZ_SHIFT in favour of STRTAB_NUM_L2_STES.

Use STRTAB_NUM_L2_STES to replace remaining open coded 1 << STRTAB_SPLIT.

Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/1-v4-6416877274e1+1af-smmuv3_tidy_jgg@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>

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Jason Gunthorpe 2024-09-06 12:47:48 -03:00 • committed by Will Deacon

parent 19eb465c96

commit ce410410f1

2 changed files with 32 additions and 27 deletions

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45

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

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14

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h

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