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| author | Eric Auger <eric.auger@redhat.com> | 2017-01-19 21:57:49 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-01-23 12:48:16 +0100 |
| commit | 2b20cbba3390a55c511acba2f0f517dd27a528b2 (patch) | |
| tree | f88d74a181db5f6d0b7c801c51ab18db26ab16ed /drivers/iommu/iommu.c | |
| parent | iommu: Add a new type field in iommu_resv_region (diff) | |
| download | linux-2b20cbba3390a55c511acba2f0f517dd27a528b2.tar.xz linux-2b20cbba3390a55c511acba2f0f517dd27a528b2.zip | |
iommu: iommu_alloc_resv_region
Introduce a new helper serving the purpose to allocate a reserved
region. This will be used in iommu driver implementing reserved
region callbacks.
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 'drivers/iommu/iommu.c')
| -rw-r--r-- | drivers/iommu/iommu.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 1cee5c361c21..927878d0a612 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1575,6 +1575,24 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list) ops->put_resv_regions(dev, list); } +struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start, + size_t length, + int prot, int type) +{ + struct iommu_resv_region *region; + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) + return NULL; + + INIT_LIST_HEAD(®ion->list); + region->start = start; + region->length = length; + region->prot = prot; + region->type = type; + return region; +} + /* Request that a device is direct mapped by the IOMMU */ int iommu_request_dm_for_dev(struct device *dev) { |