This patch series consist of three parts and covers the following:
1. Remove cfg inside qcom_smmu structure and replace it with single
pointer to qcom_smmu_match_data avoiding replication of multiple
members from same.
2. Introduce intital set of driver changes to implement ACTLR register
for custom prefetcher settings in Qualcomm SoCs.
3. Add ACTLR data and implementation operations for SM8550.
4. Add ACTLR data and implementation operations for SC7280.
5. Re-enable context caching for Qualcomm SoCs to retain prefetcher
settings during reset and runtime suspend.
Changes in v4 from v3:
New addition:
- Remove actlrcfg_size and use NULL end element instead to traverse
the actlr table, as this would be a cleaner approach by removing
redundancy of actlrcfg_size.
- Renaming of actlr set function to arm_smmu_qcom based proprietary
convention.
- break from loop once sid is found and ACTLR value is initialized
in qcom_smmu_set_actlr.
- Modify the GFX prefetch value separating into 2 sensible defines.
- Modify comments for prefetch defines as per SMMU-500 TRM.
Changes to incorporate suggestions from Konrad as follows:
- Use Reverse-Christmas-tree sorting wherever applicable.
- Pass arguments directly to arm_smmu_set_actlr instead of creating
duplicate variables.
- Use array indexing instead of direct pointer addressed by new
addition of eliminating actlrcfg_size.
- Switch the HEX value's case from upper to lower case in SC7280
actlrcfg table.
Changes to incorporate suggestions from Dmitry as follows:
- Separate changes not related to ACTLR support to different commit
with patch 5/5.
- Using pointer to struct for arguments in smr_is_subset().
Changes to incorporate suggestions from Bjorn as follows:
- fix the commit message for patch 2/5 to properly document the
value space to avoid confusion.
Fixed build issues reported by kernel test robot [1] for
arm64-allyesconfig [2].
[1]: https://lore.kernel.org/all/[email protected]/
[2]: https://download.01.org/0day-ci/archive/20231201/[email protected]/config
Link to v3:
https://lore.kernel.org/all/[email protected]/
Changes in v3 from v2:
New addition:
- Include patch 3/4 for adding ACTLR support and data for SC7280.
- Add driver changes for actlr support in gpu smmu.
- Add target wise actlr data and implementation ops for gpu smmu.
Changes to incorporate suggestions from Robin as follows:
- Match the ACTLR values with individual corresponding SID instead
of assuming that any SMR will be programmed to match a superset of
the data.
- Instead of replicating each elements from qcom_smmu_match_data to
qcom_smmu structre during smmu device creation, replace the
replicated members with qcom_smmu_match_data structure inside
qcom_smmu structre and handle the dereference in places that
requires them.
Changes to incorporate suggestions from Dmitry and Konrad as follows:
- Maintain actlr table inside a single structure instead of
nested structure.
- Rename prefetch defines to more appropriately describe their behavior.
- Remove SM8550 specific implementation ops and roll back to default
qcom_smmu_500_impl implementation ops.
- Add back the removed comments which are NAK.
- Fix commit description for patch 4/4.
Link to v2:
https://lore.kernel.org/all/[email protected]/
Changes in v2 from v1:
- Incorporated suggestions on v1 from Dmitry,Konrad,Pratyush.
- Added defines for ACTLR values.
- Linked sm8550 implementation structure to corresponding
compatible string.
- Repackaged actlr value set implementation to separate function.
- Fixed indentation errors.
- Link to v1:
https://lore.kernel.org/all/[email protected]/
Changes in v1 from RFC:
- Incorporated suggestion form Robin on RFC
- Moved the actlr data table into driver, instead of maintaining
it inside soc specific DT and piggybacking on exisiting iommus
property (iommu = <SID, MASK, ACTLR>) to set this value during
smmu probe.
- Link to RFC:
https://lore.kernel.org/all/[email protected]/
Bibek Kumar Patro (5):
iommu/arm-smmu: refactor qcom_smmu structure to include single pointer
iommu/arm-smmu: introduction of ACTLR for custom prefetcher settings
iommu/arm-smmu: add ACTLR data and support for SM8550
iommu/arm-smmu: add ACTLR data and support for SC7280
iommu/arm-smmu: re-enable context caching in smmu reset operation
.../iommu/arm/arm-smmu/arm-smmu-qcom-debug.c | 2 +-
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 184 +++++++++++++++++-
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h | 6 +-
drivers/iommu/arm/arm-smmu/arm-smmu.c | 5 +-
drivers/iommu/arm/arm-smmu/arm-smmu.h | 5 +
5 files changed, 193 insertions(+), 9 deletions(-)
--
2.17.1