iommu: Introduce iommu_capable API function
This function will replace the current iommu_domain_has_cap
function and clean up the interface while at it.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index bc45478..aeb243f 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -817,6 +817,15 @@
}
EXPORT_SYMBOL_GPL(iommu_present);
+bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
+{
+ if (!bus->iommu_ops || !bus->iommu_ops->capable)
+ return false;
+
+ return bus->iommu_ops->capable(cap);
+}
+EXPORT_SYMBOL_GPL(iommu_capable);
+
/**
* iommu_set_fault_handler() - set a fault handler for an iommu domain
* @domain: iommu domain
@@ -950,10 +959,13 @@
int iommu_domain_has_cap(struct iommu_domain *domain,
enum iommu_cap cap)
{
- if (unlikely(domain->ops->domain_has_cap == NULL))
- return 0;
+ if (domain->ops->domain_has_cap != NULL)
+ return domain->ops->domain_has_cap(domain, cap);
- return domain->ops->domain_has_cap(domain, cap);
+ if (domain->ops->capable != NULL)
+ return domain->ops->capable(cap);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(iommu_domain_has_cap);