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| author |   Eric Auger <eric.auger@redhat.com> | 2017-01-19 20:57:51 +0000 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2017-01-23 11:48:16 +0000 |
| commit | 6c65fb318e8bbf21e939e651028b955324f1d873 (patch) | |
| tree | c8d37cf2ad29e2096ece1d01564b8eddc1ee8ec6 /include/linux/iommu.h | |
| parent | iommu: Only map direct mapped regions (diff) | |
| download | linux-dev-6c65fb318e8bbf21e939e651028b955324f1d873.tar.xz linux-dev-6c65fb318e8bbf21e939e651028b955324f1d873.zip | |
iommu: iommu_get_group_resv_regions
Introduce iommu_get_group_resv_regions whose role consists in
enumerating all devices from the group and collecting their
reserved regions. The list is sorted and overlaps between
regions of the same type are handled by merging the regions.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index f6bb55d3e606..bec3730dc009 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -246,6 +246,8 @@ extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); extern struct iommu_resv_region * iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, int type); +extern int iommu_get_group_resv_regions(struct iommu_group *group, + struct list_head *head); extern int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group); @@ -463,6 +465,12 @@ static inline void iommu_put_resv_regions(struct device *dev, { } +static inline int iommu_get_group_resv_regions(struct iommu_group *group, + struct list_head *head) +{ + return -ENODEV; +} + static inline int iommu_request_dm_for_dev(struct device *dev) { return -ENODEV; |