From 6eab556a40384de94c2d03c8d9d632e5154367f5 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 21 Oct 2015 23:51:38 +0200 Subject: [PATCH] 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: Joerg Roedel --- drivers/iommu/iommu.c | 15 +++++++++++++++ include/linux/iommu.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index fdea700ca12c..a80c9c5c2650 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -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. diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a1a06639a64a..f28dff313b07 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -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 */ -- 2.20.1