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/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 0e0e5f2..b3aced7 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -852,6 +852,26 @@
}
EXPORT_SYMBOL_GPL(iommu_unmap);
+
+int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
+ phys_addr_t paddr, u64 size)
+{
+ if (unlikely(domain->ops->domain_window_enable == NULL))
+ return -ENODEV;
+
+ return domain->ops->domain_window_enable(domain, wnd_nr, paddr, size);
+}
+EXPORT_SYMBOL_GPL(iommu_domain_window_enable);
+
+void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr)
+{
+ if (unlikely(domain->ops->domain_window_disable == NULL))
+ return;
+
+ return domain->ops->domain_window_disable(domain, wnd_nr);
+}
+EXPORT_SYMBOL_GPL(iommu_domain_window_disable);
+
static int __init iommu_init(void)
{
iommu_group_kset = kset_create_and_add("iommu_groups",