Commit 6eab556a authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu: Add generic_device_group() function 



This function can be used as a device_group call-back and
just allocates one iommu-group per device.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 5e62292b

drivers/iommu/iommu.c

+15 −0
Original line number Diff line number Diff line
@@ -727,6 +727,21 @@ static int get_pci_alias_or_group(struct pci_dev *pdev, u16 alias, void *opaque) 
	return data->group != NULL;

}



/*

 * Generic device_group call-back function. It just allocates one

 * iommu-group per device.

 */

struct iommu_group *generic_device_group(struct device *dev)

{

	struct iommu_group *group;



	group = iommu_group_alloc();

	if (IS_ERR(group))

		return NULL;



	return group;

}



/*

 * Use standard PCI bus topology, isolation features, and DMA alias quirks

 * to find or create an IOMMU group for a device.

include/linux/iommu.h

+2 −0
Original line number Diff line number Diff line
@@ -319,6 +319,8 @@ static inline size_t iommu_map_sg(struct iommu_domain *domain, 


/* PCI device grouping function */

extern struct iommu_group *pci_device_group(struct device *dev);

/* Generic device grouping function */

extern struct iommu_group *generic_device_group(struct device *dev);



#else /* CONFIG_IOMMU_API */