Messages in this thread | | | Date | Sat, 4 Nov 2023 03:36:42 +0530 | Subject | Re: [PATCH 3/3] iommu/arm-smmu: re-enable context caching in smmu reset operation | From | Bibek Kumar Patro <> |
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On 11/4/2023 3:28 AM, Dmitry Baryshkov wrote: > On Fri, 3 Nov 2023 at 23:53, Bibek Kumar Patro > <quic_bibekkum@quicinc.com> wrote: >> >> Context caching is re-enabled in the prefetch buffer for Qualcomm SoCs >> through SoC specific reset ops, which is disabled in the default MMU-500 >> reset ops, but is expected for context banks using ACTLR register to >> retain the prefetch value during reset and runtime suspend. >> >> Signed-off-by: Bibek Kumar Patro <quic_bibekkum@quicinc.com> >> --- >> drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 26 ++++++++++++++++++---- >> 1 file changed, 22 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c >> index 590b7c285299..f342b4778cf1 100644 >> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c >> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c >> @@ -457,11 +457,29 @@ static int qcom_smmu_def_domain_type(struct device *dev) >> return match ? IOMMU_DOMAIN_IDENTITY : 0; >> } >> >> +#define ARM_MMU500_ACTLR_CPRE BIT(1) >> + >> +static int qcom_smmu500_reset(struct arm_smmu_device *smmu) >> +{ >> + int i; >> + u32 reg; >> + >> + arm_mmu500_reset(smmu); >> + >> + for (i = 0; i < smmu->num_context_banks; ++i) { >> + reg = arm_smmu_cb_read(smmu, i, ARM_SMMU_CB_ACTLR); >> + reg |= ARM_MMU500_ACTLR_CPRE; >> + arm_smmu_cb_write(smmu, i, ARM_SMMU_CB_ACTLR, reg); >> + } > > Wrong indentation. Did you run your patches through checkpatch.pl? >
Yes Dmitry, I did run checkpatch.pl script on this patch as well as others, got 0 errors and 0 warnings. With -f option as well. Did not get any related errors and warnings.
>> + >> + return 0; >> +} >> + >> static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu) >> { >> int ret; >> >> - arm_mmu500_reset(smmu); >> + qcom_smmu500_reset(smmu); >> >> /* >> * To address performance degradation in non-real time clients, >> @@ -488,7 +506,7 @@ static const struct arm_smmu_impl qcom_smmu_500_impl = { >> .init_context = qcom_smmu_init_context, >> .cfg_probe = qcom_smmu_cfg_probe, >> .def_domain_type = qcom_smmu_def_domain_type, >> - .reset = arm_mmu500_reset, >> + .reset = qcom_smmu500_reset, >> .write_s2cr = qcom_smmu_write_s2cr, >> .tlb_sync = qcom_smmu_tlb_sync, >> }; >> @@ -507,7 +525,7 @@ static const struct arm_smmu_impl sm8550_smmu_500_impl = { >> .init_context = qcom_smmu_init_context, >> .cfg_probe = qcom_smmu_cfg_probe, >> .def_domain_type = qcom_smmu_def_domain_type, >> - .reset = arm_mmu500_reset, >> + .reset = qcom_smmu500_reset, >> .write_s2cr = qcom_smmu_write_s2cr, >> .tlb_sync = qcom_smmu_tlb_sync, >> }; >> @@ -523,7 +541,7 @@ static const struct arm_smmu_impl qcom_adreno_smmu_v2_impl = { >> static const struct arm_smmu_impl qcom_adreno_smmu_500_impl = { >> .init_context = qcom_adreno_smmu_init_context, >> .def_domain_type = qcom_smmu_def_domain_type, >> - .reset = arm_mmu500_reset, >> + .reset = qcom_smmu500_reset, >> .alloc_context_bank = qcom_adreno_smmu_alloc_context_bank, >> .write_sctlr = qcom_adreno_smmu_write_sctlr, >> .tlb_sync = qcom_smmu_tlb_sync, >> -- >> 2.17.1 >> > >
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