#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 */