Introduce init function for setting up DMA domain for DMA-API with
the IOMMU v2 page table.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
---
drivers/iommu/amd/iommu.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index e29ece6e1e68..bd26de8764bd 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1937,6 +1937,24 @@ static int protection_domain_init_v1(struct
protection_domain *domain, int mode)
return 0;
}
+static int protection_domain_init_v2(struct protection_domain *domain)
+{
+ spin_lock_init(&domain->lock);
+ domain->id = domain_id_alloc();
+ if (!domain->id)
+ return -ENOMEM;
+ INIT_LIST_HEAD(&domain->dev_list);
+
+ domain->giov = true;
+
+ if (amd_iommu_pgtable == AMD_IOMMU_V2 &&
+ domain_enable_v2(domain, 1, false)) {
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
static struct protection_domain *protection_domain_alloc(unsigned int type)
{
struct io_pgtable_ops *pgtbl_ops;
@@ -1964,6 +1982,9 @@ static struct protection_domain
*protection_domain_alloc(unsigned int type)
case AMD_IOMMU_V1:
ret = protection_domain_init_v1(domain, mode);
break;
+ case AMD_IOMMU_V2:
+ ret = protection_domain_init_v2(domain);
+ break;
default:
ret = -EINVAL;
}
--
2.17.1
