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-rw-r--r--include/linux/iommu.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 0546b8710ce3..dc767f7c3704 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -114,6 +114,20 @@ enum iommu_attr {
DOMAIN_ATTR_MAX,
};
+/**
+ * struct iommu_dm_region - descriptor for a direct mapped memory region
+ * @list: Linked list pointers
+ * @start: System physical start address of the region
+ * @length: Length of the region in bytes
+ * @prot: IOMMU Protection flags (READ/WRITE/...)
+ */
+struct iommu_dm_region {
+ struct list_head list;
+ phys_addr_t start;
+ size_t length;
+ int prot;
+};
+
#ifdef CONFIG_IOMMU_API
/**
@@ -159,6 +173,10 @@ struct iommu_ops {
int (*domain_set_attr)(struct iommu_domain *domain,
enum iommu_attr attr, void *data);
+ /* Request/Free a list of direct mapping requirements for a device */
+ void (*get_dm_regions)(struct device *dev, struct list_head *list);
+ void (*put_dm_regions)(struct device *dev, struct list_head *list);
+
/* Window handling functions */
int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
phys_addr_t paddr, u64 size, int prot);
@@ -193,6 +211,7 @@ extern int iommu_attach_device(struct iommu_domain *domain,
struct device *dev);
extern void iommu_detach_device(struct iommu_domain *domain,
struct device *dev);
+extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot);
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
@@ -204,6 +223,10 @@ extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t io
extern void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler, void *token);
+extern void iommu_get_dm_regions(struct device *dev, struct list_head *list);
+extern void iommu_put_dm_regions(struct device *dev, struct list_head *list);
+extern int iommu_request_dm_for_dev(struct device *dev);
+
extern int iommu_attach_group(struct iommu_domain *domain,
struct iommu_group *group);
extern void iommu_detach_group(struct iommu_domain *domain,
@@ -227,6 +250,7 @@ extern int iommu_group_unregister_notifier(struct iommu_group *group,
struct notifier_block *nb);
extern int iommu_group_id(struct iommu_group *group);
extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
+extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
void *data);
@@ -332,6 +356,11 @@ static inline void iommu_detach_device(struct iommu_domain *domain,
{
}
+static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
+{
+ return NULL;
+}
+
static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, int gfp_order, int prot)
{
@@ -373,6 +402,21 @@ static inline void iommu_set_fault_handler(struct iommu_domain *domain,
{
}
+static inline void iommu_get_dm_regions(struct device *dev,
+ struct list_head *list)
+{
+}
+
+static inline void iommu_put_dm_regions(struct device *dev,
+ struct list_head *list)
+{
+}
+
+static inline int iommu_request_dm_for_dev(struct device *dev)
+{
+ return -ENODEV;
+}
+
static inline int iommu_attach_group(struct iommu_domain *domain,
struct iommu_group *group)
{
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