Re: [PATCH 02/19] iommu/arm-smmu: Pass io-pgtable config to implementation specific function

Bjorn Andersson
2020-09-01T03:36:57Z

On Thu 13 Aug 21:40 CDT 2020, Rob Clark wrote:

> From: Jordan Crouse <jcrouse@codeaurora.org>
>
> Construct the io-pgtable config before calling the implementation specific
> init_context function and pass it so the implementation specific function
> can get a chance to change it before the io-pgtable is created.
>
> Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
> Signed-off-by: Rob Clark <robdclark@chromium.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
> drivers/iommu/arm/arm-smmu/arm-smmu-impl.c | 3 ++-
> drivers/iommu/arm/arm-smmu/arm-smmu.c | 11 ++++++-----
> drivers/iommu/arm/arm-smmu/arm-smmu.h | 3 ++-
> 3 files changed, 10 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
> index f4ff124a1967..a9861dcd0884 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
> @@ -68,7 +68,8 @@ static int cavium_cfg_probe(struct arm_smmu_device *smmu)
> return 0;
> }
>
> -static int cavium_init_context(struct arm_smmu_domain *smmu_domain)
> +static int cavium_init_context(struct arm_smmu_domain *smmu_domain,
> + struct io_pgtable_cfg *pgtbl_cfg)
> {
> struct cavium_smmu *cs = container_of(smmu_domain->smmu,
> struct cavium_smmu, smmu);
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
> index 09c42af9f31e..37d8d49299b4 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
> @@ -795,11 +795,6 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
> cfg->asid = cfg->cbndx;
>
> smmu_domain->smmu = smmu;
> - if (smmu->impl && smmu->impl->init_context) {
> - ret = smmu->impl->init_context(smmu_domain);
> - if (ret)
> - goto out_unlock;
> - }
>
> pgtbl_cfg = (struct io_pgtable_cfg) {
> .pgsize_bitmap = smmu->pgsize_bitmap,
> @@ -810,6 +805,12 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
> .iommu_dev = smmu->dev,
> };
>
> + if (smmu->impl && smmu->impl->init_context) {
> + ret = smmu->impl->init_context(smmu_domain, &pgtbl_cfg);
> + if (ret)
> + goto out_clear_smmu;
> + }
> +
> if (smmu_domain->non_strict)
> pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT;
>
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h
> index d890a4a968e8..83294516ac08 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
> @@ -386,7 +386,8 @@ struct arm_smmu_impl {
> u64 val);
> int (*cfg_probe)(struct arm_smmu_device *smmu);
> int (*reset)(struct arm_smmu_device *smmu);
> - int (*init_context)(struct arm_smmu_domain *smmu_domain);
> + int (*init_context)(struct arm_smmu_domain *smmu_domain,
> + struct io_pgtable_cfg *cfg);
> void (*tlb_sync)(struct arm_smmu_device *smmu, int page, int sync,
> int status);
> int (*def_domain_type)(struct device *dev);
> --
> 2.26.2
>