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Commit 5e62292b authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu: Export and rename iommu_group_get_for_pci_dev() 



Rename that function to pci_device_group() and export it, so
that IOMMU drivers can use it as their device_group
call-back.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 46c6b2bc

drivers/iommu/iommu.c

+6 −2
Original line number Diff line number Diff line
@@ -731,13 +731,17 @@ static int get_pci_alias_or_group(struct pci_dev *pdev, u16 alias, void *opaque) 
 * Use standard PCI bus topology, isolation features, and DMA alias quirks

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

 */

static struct iommu_group *iommu_group_get_for_pci_dev(struct pci_dev *pdev)

struct iommu_group *pci_device_group(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct group_for_pci_data data;

	struct pci_bus *bus;

	struct iommu_group *group = NULL;

	u64 devfns[4] = { 0 };



	if (WARN_ON(!dev_is_pci(dev)))

		return ERR_PTR(-EINVAL);



	/*

	 * Find the upstream DMA alias for the device.  A device must not

	 * be aliased due to topology in order to have its own IOMMU group.
@@ -827,7 +831,7 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev) 
	if (ops && ops->device_group)

		group = ops->device_group(dev);

	else if (dev_is_pci(dev))

		group = iommu_group_get_for_pci_dev(to_pci_dev(dev));

		group = pci_device_group(dev);



	if (IS_ERR(group))

		return group;

include/linux/iommu.h

+3 −0
Original line number Diff line number Diff line
@@ -317,6 +317,9 @@ static inline size_t iommu_map_sg(struct iommu_domain *domain, 
	return domain->ops->map_sg(domain, iova, sg, nents, prot);

}



/* PCI device grouping function */

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



#else /* CONFIG_IOMMU_API */



struct iommu_ops {};