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authorJoerg Roedel <joerg.roedel@amd.com>2012-01-26 22:40:52 +0400
committerJoerg Roedel <joerg.roedel@amd.com>2012-07-11 14:12:14 +0400
commit0cd76dd13bdd2f7f02a2dc931e808e92b191082f (patch)
tree210df4b7fda8f81121fd8fb1f89a57e3e358060e /include/linux/iommu.h
parentbd0a521e88aa7a06ae7aabaed7ae196ed4ad867a (diff)
downloadlinux-0cd76dd13bdd2f7f02a2dc931e808e92b191082f.tar.xz
iommu: Add domain-attribute handlers
This patch introduces an extension to the iommu-api to get and set attributes for an iommu_domain. Two functions are introduced for this: * iommu_domain_get_attr() * iommu_domain_set_attr() These functions will be used to make the iommu-api suitable for GART-like IOMMUs and to implement hardware-specifc api-extensions. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r--include/linux/iommu.h28
1 files changed, 27 insertions, 1 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 450293f6d68b..0eef096183e8 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -47,6 +47,10 @@ struct iommu_domain {
#define IOMMU_CAP_CACHE_COHERENCY 0x1
#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */
+enum iommu_attr {
+ DOMAIN_ATTR_MAX,
+};
+
#ifdef CONFIG_IOMMU_API
/**
@@ -59,7 +63,8 @@ struct iommu_domain {
* @unmap: unmap a physically contiguous memory region from an iommu domain
* @iova_to_phys: translate iova to physical address
* @domain_has_cap: domain capabilities query
- * @commit: commit iommu domain
+ * @domain_get_attr: Query domain attributes
+ * @domain_set_attr: Change domain attributes
* @pgsize_bitmap: bitmap of supported page sizes
*/
struct iommu_ops {
@@ -76,6 +81,10 @@ struct iommu_ops {
int (*domain_has_cap)(struct iommu_domain *domain,
unsigned long cap);
int (*device_group)(struct device *dev, unsigned int *groupid);
+ int (*domain_get_attr)(struct iommu_domain *domain,
+ enum iommu_attr attr, void *data);
+ int (*domain_set_attr)(struct iommu_domain *domain,
+ enum iommu_attr attr, void *data);
unsigned long pgsize_bitmap;
};
@@ -99,6 +108,11 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler, void *token);
extern int iommu_device_group(struct device *dev, unsigned int *groupid);
+extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
+ void *data);
+extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
+ void *data);
+
/**
* report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
* @domain: the iommu domain where the fault has happened
@@ -202,6 +216,18 @@ static inline int iommu_device_group(struct device *dev, unsigned int *groupid)
return -ENODEV;
}
+static inline int iommu_domain_get_attr(struct iommu_domain *domain,
+ enum iommu_attr attr, void *data)
+{
+ return -EINVAL;
+}
+
+static inline int iommu_domain_set_attr(struct iommu_domain *domain,
+ enum iommu_attr attr, void *data)
+{
+ return -EINVAL;
+}
+
#endif /* CONFIG_IOMMU_API */
#endif /* __LINUX_IOMMU_H */