Merge tag 'arm-soc-imx-move' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...

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

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 432acc4c054df1134dddb9be501de5c27d84d926..d937580417ba668d343b30b1741d59139f7924b9 100644 (file)
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -48,19 +48,34 @@ struct iommu_domain {
 
 #ifdef CONFIG_IOMMU_API
 
+/**
+ * struct iommu_ops - iommu ops and capabilities
+ * @domain_init: init iommu domain
+ * @domain_destroy: destroy iommu domain
+ * @attach_dev: attach device to an iommu domain
+ * @detach_dev: detach device from an iommu domain
+ * @map: map a physically contiguous memory region to an 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
+ * @pgsize_bitmap: bitmap of supported page sizes
+ */
 struct iommu_ops {
        int (*domain_init)(struct iommu_domain *domain);
        void (*domain_destroy)(struct iommu_domain *domain);
        int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
        void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
        int (*map)(struct iommu_domain *domain, unsigned long iova,
-                  phys_addr_t paddr, int gfp_order, int prot);
-       int (*unmap)(struct iommu_domain *domain, unsigned long iova,
-                    int gfp_order);
+                  phys_addr_t paddr, size_t size, int prot);
+       size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
+                    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);
+       int (*device_group)(struct device *dev, unsigned int *groupid);
+       unsigned long pgsize_bitmap;
 };
 
 extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
@@ -72,15 +87,16 @@ extern int iommu_attach_device(struct iommu_domain *domain,
 extern void iommu_detach_device(struct iommu_domain *domain,
                                struct device *dev);
 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
-                    phys_addr_t paddr, int gfp_order, int prot);
-extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
-                      int gfp_order);
+                    phys_addr_t paddr, size_t size, int prot);
+extern size_t iommu_unmap(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);
 extern void iommu_set_fault_handler(struct iommu_domain *domain,
                                        iommu_fault_handler_t handler);
+extern int iommu_device_group(struct device *dev, unsigned int *groupid);
 
 /**
  * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
@@ -179,6 +195,11 @@ static inline void iommu_set_fault_handler(struct iommu_domain *domain,
 {
 }
 
+static inline int iommu_device_group(struct device *dev, unsigned int *groupid)
+{
+       return -ENODEV;
+}
+
 #endif /* CONFIG_IOMMU_API */
 
 #endif /* __LINUX_IOMMU_H */