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authorJoerg Roedel <joro@8bytes.org>2013-02-04 14:00:01 +0100
committerJoerg Roedel <joro@8bytes.org>2013-02-06 10:47:28 +0100
commit693567125bde1966a095267a9d8ca1b8d40f59ee (patch)
tree0ab1b5b9fea365c2d3d0b16388652c5041ce438d /drivers/iommu
parentd7787d579cbef9f8079104759a2259fc916c688c (diff)
iommu: Add DOMAIN_ATTR_WINDOWS domain attribute
This attribute can be used to set and get the number of subwindows on IOMMUs that are window-based. Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/iommu.c33
1 files changed, 30 insertions, 3 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index b3aced7356c..b972d430d92 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -891,6 +891,7 @@ int iommu_domain_get_attr(struct iommu_domain *domain,
struct iommu_domain_geometry *geometry;
bool *paging;
int ret = 0;
+ u32 *count;
switch (attr) {
case DOMAIN_ATTR_GEOMETRY:
@@ -902,6 +903,15 @@ int iommu_domain_get_attr(struct iommu_domain *domain,
paging = data;
*paging = (domain->ops->pgsize_bitmap != 0UL);
break;
+ case DOMAIN_ATTR_WINDOWS:
+ count = data;
+
+ if (domain->ops->domain_get_windows != NULL)
+ *count = domain->ops->domain_get_windows(domain);
+ else
+ ret = -ENODEV;
+
+ break;
default:
if (!domain->ops->domain_get_attr)
return -EINVAL;
@@ -916,9 +926,26 @@ EXPORT_SYMBOL_GPL(iommu_domain_get_attr);
int iommu_domain_set_attr(struct iommu_domain *domain,
enum iommu_attr attr, void *data)
{
- if (!domain->ops->domain_set_attr)
- return -EINVAL;
+ int ret = 0;
+ u32 *count;
+
+ switch (attr) {
+ case DOMAIN_ATTR_WINDOWS:
+ count = data;
+
+ if (domain->ops->domain_set_windows != NULL)
+ ret = domain->ops->domain_set_windows(domain, *count);
+ else
+ ret = -ENODEV;
- return domain->ops->domain_set_attr(domain, attr, data);
+ break;
+ default:
+ if (domain->ops->domain_set_attr == NULL)
+ return -EINVAL;
+
+ ret = domain->ops->domain_set_attr(domain, attr, data);
+ }
+
+ return ret;
}
EXPORT_SYMBOL_GPL(iommu_domain_set_attr);