Implement the unmap_pages() callback for the ARM SMMU driver
to allow calls from iommu_unmap to unmap multiple pages of
the same size in one call.
Signed-off-by: Isaac J. Manjarres <isa...@codeaurora.org>
Suggested-by: Will Deacon <w...@kernel.org>
---
drivers/iommu/arm/arm-smmu/arm-smmu.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c
b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index d8c6bfde6a61..f29f1fb109f8 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1225,6 +1225,24 @@ static size_t arm_smmu_unmap(struct iommu_domain
*domain, unsigned long iova,
return ret;
}
+static size_t arm_smmu_unmap_pages(struct iommu_domain *domain, unsigned long
iova,
+ size_t pgsize, size_t pgcount,
+ struct iommu_iotlb_gather *iotlb_gather)
+{
+ struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops;
+ struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu;
+ size_t ret;
+
+ if (!ops)
+ return 0;
+
+ arm_smmu_rpm_get(smmu);
+ ret = ops->unmap_pages(ops, iova, pgsize, pgcount, iotlb_gather);
+ arm_smmu_rpm_put(smmu);
+
+ return ret;
+}
+
static void arm_smmu_flush_iotlb_all(struct iommu_domain *domain)
{
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
@@ -1625,6 +1643,7 @@ static struct iommu_ops arm_smmu_ops = {
.attach_dev = arm_smmu_attach_dev,
.map = arm_smmu_map,
.unmap = arm_smmu_unmap,
+ .unmap_pages = arm_smmu_unmap_pages,
.flush_iotlb_all = arm_smmu_flush_iotlb_all,
.iotlb_sync = arm_smmu_iotlb_sync,
.iova_to_phys = arm_smmu_iova_to_phys,
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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