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iommu: Add apply_dm_region call-back to iommu-ops

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This new call-back will be used by the iommu driver to do
reserve the given dm_region in its iova space before the
mapping is created.

The call-back is temporary until the dma-ops implementation
is part of the common iommu code.

Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Joerg Roedel 2016-07-05 13:07:53 +02:00
commit 33b21a6b20
2 changed files with 6 additions and 0 deletions
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3
drivers/iommu/iommu.c
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@ -348,6 +348,9 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group,
list_for_each_entry(entry, &mappings, list) {
dma_addr_t start, end, addr;
if (domain->ops->apply_dm_region)
domain->ops->apply_dm_region(dev, domain, entry);
start = ALIGN(entry->start, pg_size);
end = ALIGN(entry->start + entry->length, pg_size);