1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c
index f4c86c429297..cf7cbec116ed 100644
--- a/drivers/base/iommu.c
+++ b/drivers/base/iommu.c
@@ -107,3 +107,34 @@ int iommu_domain_has_cap(struct iommu_domain *domain,
 	return iommu_ops->domain_has_cap(domain, cap);
 }
 EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
+
+int iommu_map(struct iommu_domain *domain, unsigned long iova,
+	      phys_addr_t paddr, int gfp_order, int prot)
+{
+	unsigned long invalid_mask;
+	size_t size;
+
+	size         = 0x1000UL << gfp_order;
+	invalid_mask = size - 1;
+
+	BUG_ON((iova | paddr) & invalid_mask);
+
+	return iommu_ops->map_range(domain, iova, paddr, size, prot);
+}
+EXPORT_SYMBOL_GPL(iommu_map);
+
+int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
+{
+	unsigned long invalid_mask;
+	size_t size;
+
+	size         = 0x1000UL << gfp_order;
+	invalid_mask = size - 1;
+
+	BUG_ON(iova & invalid_mask);
+
+	iommu_ops->unmap_range(domain, iova, size);
+
+	return gfp_order;
+}
+EXPORT_SYMBOL_GPL(iommu_unmap);