1 files changed, 29 insertions, 1 deletions

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index f3b99e1c1042..ba3b8a98a049 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -58,8 +58,10 @@ struct iommu_domain {
 #define IOMMU_CAP_INTR_REMAP            0x2     /* isolates device intrs */
 
 enum iommu_attr {
-        DOMAIN_ATTR_MAX,
         DOMAIN_ATTR_GEOMETRY,
+        DOMAIN_ATTR_PAGING,
+        DOMAIN_ATTR_WINDOWS,
+        DOMAIN_ATTR_MAX,
 };
 
 #ifdef CONFIG_IOMMU_API
@@ -100,6 +102,16 @@ struct iommu_ops {
                                enum iommu_attr attr, void *data);
         int (*domain_set_attr)(struct iommu_domain *domain,
                                enum iommu_attr attr, void *data);
+
+        /* Window handling functions */
+        int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
+                                    phys_addr_t paddr, u64 size);
+        void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
+        /* Set the numer of window per domain */
+        int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count);
+        /* Get the numer of window per domain */
+        u32 (*domain_get_windows)(struct iommu_domain *domain);
+
         unsigned long pgsize_bitmap;
 };
 
@@ -157,6 +169,10 @@ extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
                                  void *data);
 
+/* Window handling function prototypes */
+extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
+                                      phys_addr_t offset, u64 size);
+extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
 /**
  * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
  * @domain: the iommu domain where the fault has happened
@@ -239,6 +255,18 @@ static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
         return -ENODEV;
 }
 
+static inline int iommu_domain_window_enable(struct iommu_domain *domain,
+                                             u32 wnd_nr, phys_addr_t paddr,
+                                             u64 size)
+{
+        return -ENODEV;
+}
+
+static inline void iommu_domain_window_disable(struct iommu_domain *domain,
+                                               u32 wnd_nr)
+{
+}
+
 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
                                              unsigned long iova)
 {