[PATCH 2/3] iommu/tegra-smmu: Fix iova->phys translation

Nicolin Chen
2020-09-11T07:19:26Z

IOVA might not be always 4KB aligned. So tegra_smmu_iova_to_phys
function needs to add on the lower 12-bit offset from input iova.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
drivers/iommu/tegra-smmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 789d21c01b77..50b962b0647e 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -795,7 +795,7 @@ static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain,

pfn = *pte & as->smmu->pfn_mask;

- return SMMU_PFN_PHYS(pfn);
+ return SMMU_PFN_PHYS(pfn) + SMMU_OFFSET_IN_PAGE(iova);
}

static struct tegra_smmu *tegra_smmu_find(struct device_node *np)
--
2.17.1