iommu: Add domain window handling functions
Add the iommu_domain_window_enable() and iommu_domain_window_disable()
functions to the IOMMU-API. These functions will be used to setup
domains that are based on subwindows and not on paging.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 26066f5..5ea3d72 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -101,6 +101,12 @@
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);
+
unsigned long pgsize_bitmap;
};
@@ -158,6 +164,10 @@
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
@@ -240,6 +250,18 @@
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)
{