This patch adds new callbacks for mapping and unmapping
pages to the iommu_ops structure. These callbacks are aware
of page sizes which makes them different to the
->{un}map_range callbacks.
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
drivers/base/iommu.c | 6 ++++++
include/linux/iommu.h | 4 ++++
2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c
index cf7cbec..55d37e4 100644
--- a/drivers/base/iommu.c
+++ b/drivers/base/iommu.c
@@ -119,6 +119,9 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova,
BUG_ON((iova | paddr) & invalid_mask);
+ if (iommu_ops->map)
+ return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
+
return iommu_ops->map_range(domain, iova, paddr, size, prot);
}
EXPORT_SYMBOL_GPL(iommu_map);
@@ -133,6 +136,9 @@ int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
BUG_ON(iova & invalid_mask);
+ if (iommu_ops->unmap)
+ return iommu_ops->unmap(domain, iova, gfp_order);
+
iommu_ops->unmap_range(domain, iova, size);
return gfp_order;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 6d0035b..5a7a3d8 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -36,6 +36,10 @@ struct iommu_ops {
void (*domain_destroy)(struct iommu_domain *domain);
int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
+ int (*map)(struct iommu_domain *domain, unsigned long iova,
+ phys_addr_t paddr, int gfp_order, int prot);
+ int (*unmap)(struct iommu_domain *domain, unsigned long iova,
+ int gfp_order);
int (*map_range)(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot);
void (*unmap_range)(struct iommu_domain *domain, unsigned long iova,
--
1.6.6
--
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