4 files changed, 63 insertions, 1 deletions
diff --git a/include/linux/device.h b/include/linux/device.h
index 38f02814d53a..bc41e87a969b 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -41,6 +41,7 @@ struct device_node;
 struct fwnode_handle;
 struct iommu_ops;
 struct iommu_group;
+struct iommu_fwspec;
 
 struct bus_attribute {
 	struct attribute	attr;
@@ -765,6 +766,7 @@ struct device_dma_parameters {
  * 		gone away. This should be set by the allocator of the
  * 		device (i.e. the bus driver that discovered the device).
  * @iommu_group: IOMMU group the device belongs to.
+ * @iommu_fwspec: IOMMU-specific properties supplied by firmware.
  *
  * @offline_disabled: If set, the device is permanently online.
  * @offline:	Set after successful invocation of bus type's .offline().
@@ -849,6 +851,7 @@ struct device {
 
 	void	(*release)(struct device *dev);
 	struct iommu_group	*iommu_group;
+	struct iommu_fwspec	*iommu_fwspec;
 
 	bool			offline_disabled:1;
 	bool			offline:1;
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 81c5c8d167ad..32c589062bd9 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -21,6 +21,7 @@
 
 #ifdef CONFIG_IOMMU_DMA
 #include <linux/iommu.h>
+#include <linux/msi.h>
 
 int iommu_dma_init(void);
 
@@ -29,7 +30,8 @@ int iommu_get_dma_cookie(struct iommu_domain *domain);
 void iommu_put_dma_cookie(struct iommu_domain *domain);
 
 /* Setup call for arch DMA mapping code */
-int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, u64 size);
+int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
+		u64 size, struct device *dev);
 
 /* General helpers for DMA-API <-> IOMMU-API interaction */
 int dma_direction_to_prot(enum dma_data_direction dir, bool coherent);
@@ -62,9 +64,13 @@ void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
 int iommu_dma_supported(struct device *dev, u64 mask);
 int iommu_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
 
+/* The DMA API isn't _quite_ the whole story, though... */
+void iommu_dma_map_msi_msg(int irq, struct msi_msg *msg);
+
 #else
 
 struct iommu_domain;
+struct msi_msg;
 
 static inline int iommu_dma_init(void)
 {
@@ -80,6 +86,10 @@ static inline void iommu_put_dma_cookie(struct iommu_domain *domain)
 {
 }
 
+static inline void iommu_dma_map_msi_msg(int irq, struct msi_msg *msg)
+{
+}
+
 #endif	/* CONFIG_IOMMU_DMA */
 #endif	/* __KERNEL__ */
 #endif	/* __DMA_IOMMU_H */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index a35fb8b42e1a..436dc21318af 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -331,10 +331,32 @@ extern struct iommu_group *pci_device_group(struct device *dev);
 /* Generic device grouping function */
 extern struct iommu_group *generic_device_group(struct device *dev);
 
+/**
+ * struct iommu_fwspec - per-device IOMMU instance data
+ * @ops: ops for this device's IOMMU
+ * @iommu_fwnode: firmware handle for this device's IOMMU
+ * @iommu_priv: IOMMU driver private data for this device
+ * @num_ids: number of associated device IDs
+ * @ids: IDs which this device may present to the IOMMU
+ */
+struct iommu_fwspec {
+	const struct iommu_ops	*ops;
+	struct fwnode_handle	*iommu_fwnode;
+	void			*iommu_priv;
+	unsigned int		num_ids;
+	u32			ids[1];
+};
+
+int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
+		      const struct iommu_ops *ops);
+void iommu_fwspec_free(struct device *dev);
+int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
+
 #else /* CONFIG_IOMMU_API */
 
 struct iommu_ops {};
 struct iommu_group {};
+struct iommu_fwspec {};
 
 static inline bool iommu_present(struct bus_type *bus)
 {
@@ -541,6 +563,23 @@ static inline void iommu_device_unlink(struct device *dev, struct device *link)
 {
 }
 
+static inline int iommu_fwspec_init(struct device *dev,
+				    struct fwnode_handle *iommu_fwnode,
+				    const struct iommu_ops *ops)
+{
+	return -ENODEV;
+}
+
+static inline void iommu_fwspec_free(struct device *dev)
+{
+}
+
+static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
+				       int num_ids)
+{
+	return -ENODEV;
+}
+
 #endif /* CONFIG_IOMMU_API */
 
 #endif /* __LINUX_IOMMU_H */
diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
index b969e9443962..7fd5cfce9140 100644
--- a/include/linux/of_pci.h
+++ b/include/linux/of_pci.h
@@ -17,6 +17,9 @@ int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin);
 int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
 int of_get_pci_domain_nr(struct device_node *node);
 void of_pci_check_probe_only(void);
+int of_pci_map_rid(struct device_node *np, u32 rid,
+		   const char *map_name, const char *map_mask_name,
+		   struct device_node **target, u32 *id_out);
 #else
 static inline int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
 {
@@ -52,6 +55,13 @@ of_get_pci_domain_nr(struct device_node *node)
 	return -1;
 }
 
+static inline int of_pci_map_rid(struct device_node *np, u32 rid,
+			const char *map_name, const char *map_mask_name,
+			struct device_node **target, u32 *id_out)
+{
+	return -EINVAL;
+}
+
 static inline void of_pci_check_probe_only(void) { }
 #endif