[PATCH v8 0/6] iommu/tegra-smmu: Add pagetable mappings to debugfs

[Nicolin Chen <nicolinc@nvidia.com>]

This series of patches adds a new mappings node to debugfs for
tegra-smmu driver. The first five patches are all preparational
changes for PATCH-6, based on Thierry's review feedback against
v5.

Changelog
v8:
 * No changes for PATCH 1-4
 * PATCH-5:
 * * bypassed "group->as == as" to fix KMSG bug reported by Dmitry
 * PATCH-6:
 * * changed to use u32 casting for IOVA outputs
 * * squashed Dmitry's change to list all swgroup names in the same
     group_soc since they share the same as pointer
v7: https://lore.kernel.org/linux-iommu/20211208084732.23363-1-nicolinc@nvidia.com/T/
 * Added "Acked-by" from Thierry to PATCH1,4,5
 * No other changes for PATCH1,3,4,5
 * PATCH-2: dropped "s/soc/group_soc" change
 * PATCH-6:
 * * avoided forward declaration
 * * dropped castings in pd_pt_index_iova()
 * * used "'-' : 'S'" for non-secure attribute
 * * changed multi-line outputs to single-line format
v6: https://lore.kernel.org/linux-iommu/20210915043806.GA19185@Asurada-Nvidia/t/
 * Added PATCH1-3 for better naming conventions
 * Added PATCH4-5 to embed previous struct tegra_smmu_group_debug
   into struct tegra_smmu_group
 * Dropped parentheses at SMMU_PTE_ATTR_SHIFT
 * Dropped swgrp->reg print
 * Replaced ptb_reg contents with as->attr and as->pd_dma
 * Added "index" and "count" in the PD entries for readability
 * Removed Dmitry's Tested-by and Reviewed-by for the big change
   from v5 to v6.
v5: https://lore.kernel.org/linux-iommu/20210315203631.24990-1-nicoleotsuka@gmail.com/
 * Fixed a typo in commit message
 * Split a long line into two lines
 * Rearranged variable defines by length
 * Added Tested-by and Reviewed-by from Dmitry
v4: https://lore.kernel.org/lkml/20210315033504.23937-1-nicoleotsuka@gmail.com/
 * Changed %d to %u for unsigned variables
 * Fixed print format mismatch warnings on ARM32
v3: https://lore.kernel.org/linux-iommu/20210315031530.GA15245@Asurada-Nvidia/T/
 * Fixed PHYS and IOVA print formats
 * Changed variables to unsigned int type
 * Changed the table outputs to be compact
v2: https://lore.kernel.org/linux-iommu/20210312010932.GB29926@Asurada-Nvidia/T/
 * Expanded mutex range to the entire function
 * Added as->lock to protect pagetable walkthrough
 * Replaced devm_kzalloc with devm_kcalloc for group_debug
 * Added "PTE RANGE" and "SIZE" columns to group contiguous mappings
 * Dropped as->count check
 * Added WARN_ON when as->count mismatches pd[pd_index]
v1: https://lkml.org/lkml/2020/9/26/70

Nicolin Chen (6):
  iommu/tegra-smmu: Rename struct iommu_group *group to *grp
  iommu/tegra-smmu: Rename tegra_smmu_find_group to
    tegra_smmu_find_group_soc
  iommu/tegra-smmu: Rename struct tegra_smmu_swgroup *group to *swgrp
  iommu/tegra-smmu: Use swgrp pointer instead of swgroup id
  iommu/tegra-smmu: Attach as pointer to tegra_smmu_group
  iommu/tegra-smmu: Add pagetable mappings to debugfs

 drivers/iommu/tegra-smmu.c | 345 ++++++++++++++++++++++++++++++++-----
 1 file changed, 299 insertions(+), 46 deletions(-)

-- 
2.17.1