Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/parisc/iommu.h b/drivers/parisc/iommu.h
new file mode 100644
index 0000000..240059c
--- /dev/null
+++ b/drivers/parisc/iommu.h
@@ -0,0 +1,55 @@
+#ifndef _IOMMU_H
+#define _IOMMU_H 1
+
+#include <linux/pci.h>
+
+struct parisc_device;
+struct ioc;
+
+static inline struct pci_hba_data *parisc_walk_tree(struct device *dev)
+{
+ struct device *otherdev;
+
+ if (likely(dev->platform_data))
+ return dev->platform_data;
+
+ /* OK, just traverse the bus to find it */
+ for (otherdev = dev->parent;
+ otherdev;
+ otherdev = otherdev->parent) {
+ if (otherdev->platform_data) {
+ dev->platform_data = otherdev->platform_data;
+ break;
+ }
+ }
+
+ return dev->platform_data;
+}
+
+static inline struct ioc *GET_IOC(struct device *dev)
+{
+ struct pci_hba_data *pdata = parisc_walk_tree(dev);
+
+ if (!pdata)
+ return NULL;
+ return pdata->iommu;
+}
+
+#ifdef CONFIG_IOMMU_CCIO
+void *ccio_get_iommu(const struct parisc_device *dev);
+int ccio_request_resource(const struct parisc_device *dev,
+ struct resource *res);
+int ccio_allocate_resource(const struct parisc_device *dev,
+ struct resource *res, unsigned long size,
+ unsigned long min, unsigned long max, unsigned long align);
+#else /* !CONFIG_IOMMU_CCIO */
+#define ccio_get_iommu(dev) NULL
+#define ccio_request_resource(dev, res) insert_resource(&iomem_resource, res)
+#define ccio_allocate_resource(dev, res, size, min, max, align) \
+ allocate_resource(&iomem_resource, res, size, min, max, \
+ align, NULL, NULL)
+#endif /* !CONFIG_IOMMU_CCIO */
+
+void *sba_get_iommu(struct parisc_device *dev);
+
+#endif /* _IOMMU_H */