This patch adds a new function to the iommu_ops structure to allow an
OF device to be added to a specific IOMMU instance using the recently
merged generic devicetree binding for IOMMUs. The callback (of_xlate)
takes a struct device representing the master and an of_phandle_args
representing the IOMMU and the correspondong IDs for the new master.
Acked-by: Joerg Roedel <jroe...@suse.de>
Acked-by: Marek Szyprowski <m.szyprow...@samsung.com>
Tested-by: Robin Murphy <robin.mur...@arm.com>
Signed-off-by: Will Deacon <will.dea...@arm.com>
---
include/linux/iommu.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7b83f9f8e11d..415c7613d02c 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -21,6 +21,7 @@
#include <linux/errno.h>
#include <linux/err.h>
+#include <linux/of.h>
#include <linux/types.h>
#include <trace/events/iommu.h>
@@ -102,6 +103,7 @@ enum iommu_attr {
* @remove_device: remove device from iommu grouping
* @domain_get_attr: Query domain attributes
* @domain_set_attr: Change domain attributes
+ * @of_xlate: add OF master IDs to iommu grouping
* @pgsize_bitmap: bitmap of supported page sizes
* @priv: per-instance data private to the iommu driver
*/
@@ -133,6 +135,10 @@ struct iommu_ops {
/* Get the numer of window per domain */
u32 (*domain_get_windows)(struct iommu_domain *domain);
+#ifdef CONFIG_OF_IOMMU
+ int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
+#endif
+
unsigned long pgsize_bitmap;
void *priv;
};
--
2.1.1
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