iommu: Add domain_has_cap iommu_ops

[firefly-linux-kernel-4.4.55.git] / include / linux / iommu.h

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 8a7bfb1b6ca09c4275b99187b74c807bd6bdb9ae..0cf3a4e43f238e85117365dfa7a7f7c7f5b26ae0 100644 (file)
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -28,6 +28,8 @@ struct iommu_domain {
        void *priv;
 };
 
+#define IOMMU_CAP_CACHE_COHERENCY      0x1
+
 struct iommu_ops {
        int (*domain_init)(struct iommu_domain *domain);
        void (*domain_destroy)(struct iommu_domain *domain);
@@ -39,6 +41,8 @@ struct iommu_ops {
                      size_t size);
        phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
                                    unsigned long iova);
+       int (*domain_has_cap)(struct iommu_domain *domain,
+                             unsigned long cap);
 };
 
 #ifdef CONFIG_IOMMU_API
@@ -57,6 +61,8 @@ extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova,
                              size_t size);
 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
                                      unsigned long iova);
+extern int iommu_domain_has_cap(struct iommu_domain *domain,
+                               unsigned long cap);
 
 #else /* CONFIG_IOMMU_API */
 
@@ -107,6 +113,12 @@ static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
        return 0;
 }
 
+static inline int domain_has_cap(struct iommu_domain *domain,
+                                unsigned long cap)
+{
+       return 0;
+}
+
 #endif /* CONFIG_IOMMU_API */
 
 #endif /* __LINUX_IOMMU_H */