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| author | Eric Auger <eric.auger@redhat.com> | 2017-01-19 20:57:49 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-09-25 07:25:44 (GMT) |
| commit | b3bd498026675603844fe4ea1e9e1a8c7830ac4b (patch) | |
| tree | 7d8294efc677971174a6fe99780cb1daa68a5562 /drivers/iommu/iommu.c | |
| parent | 1e6de8d364806cf2c71e604aca9e86e473127b79 (diff) | |
| download | linux-b3bd498026675603844fe4ea1e9e1a8c7830ac4b.tar.xz | |
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 c7ed334..f83d762 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1562,6 +1562,24 @@ 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) { |