iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute

Implement the attribute itself and add the code for the
AMD IOMMU driver.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 0eef096183e8..f7df4aa527f3 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -37,11 +37,18 @@ struct iommu_domain;
 typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
                         struct device *, unsigned long, int, void *);
 
+struct iommu_domain_geometry {
+        dma_addr_t aperture_start; /* First address that can be mapped    */
+        dma_addr_t aperture_end;   /* Last address that can be mapped     */
+        bool force_aperture;       /* DMA only allowed in mappable range? */
+};
+
 struct iommu_domain {
         struct iommu_ops *ops;
         void *priv;
         iommu_fault_handler_t handler;
         void *handler_token;
+        struct iommu_domain_geometry geometry;
 };
 
 #define IOMMU_CAP_CACHE_COHERENCY       0x1
@@ -49,6 +56,7 @@ struct iommu_domain {
 
 enum iommu_attr {
         DOMAIN_ATTR_MAX,
+        DOMAIN_ATTR_GEOMETRY,
 };
 
 #ifdef CONFIG_IOMMU_API