[PATCH 2/8] iommu: Export and rename iommu_group_get_for_pci_dev()
From: Joerg Roedel
Date: Wed Oct 21 2015 - 17:52:18 EST
From: Joerg Roedel <jroedel@xxxxxxx>
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: Joerg Roedel <jroedel@xxxxxxx>
---
drivers/iommu/iommu.c | 8 ++++++--
include/linux/iommu.h | 3 +++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 5637463..fdea700 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -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;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 5a19952..8026e6a 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -316,6 +316,9 @@ 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 {};
--
1.9.1
--
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