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Commit d0f60a44 authored by Will Deacon's avatar Will Deacon
Browse files

iommu: add new iommu_ops callback for adding an OF device 



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: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarJoerg Roedel <jroedel@suse.de>
Acked-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Tested-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent a3a60f81

include/linux/iommu.h

+6 −0
Original line number Diff line number Diff line
@@ -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;

};