LXR linux/drivers/parisc/iommu.h

   1#ifndef _IOMMU_H
   2#define _IOMMU_H 1
   3
   4#include <linux/pci.h>
   5
   6struct parisc_device;
   7struct ioc;
   8
   9static inline struct pci_hba_data *parisc_walk_tree(struct device *dev)
  10{
  11        struct device *otherdev;
  12
  13        if (likely(dev->platform_data))
  14                return dev->platform_data;
  15
  16        /* OK, just traverse the bus to find it */
  17        for (otherdev = dev->parent;
  18             otherdev;
  19             otherdev = otherdev->parent) {
  20                if (otherdev->platform_data) {
  21                        dev->platform_data = otherdev->platform_data;
  22                        break;
  23                }
  24        }
  25
  26        return dev->platform_data;
  27}
  28
  29static inline struct ioc *GET_IOC(struct device *dev)
  30{
  31        struct pci_hba_data *pdata = parisc_walk_tree(dev);
  32
  33        if (!pdata)
  34                return NULL;
  35        return pdata->iommu;
  36}
  37
  38#ifdef CONFIG_IOMMU_CCIO
  39void *ccio_get_iommu(const struct parisc_device *dev);
  40int ccio_request_resource(const struct parisc_device *dev,
  41                struct resource *res);
  42int ccio_allocate_resource(const struct parisc_device *dev,
  43                struct resource *res, unsigned long size,
  44                unsigned long min, unsigned long max, unsigned long align);
  45#else /* !CONFIG_IOMMU_CCIO */
  46#define ccio_get_iommu(dev) NULL
  47#define ccio_request_resource(dev, res) insert_resource(&iomem_resource, res)
  48#define ccio_allocate_resource(dev, res, size, min, max, align) \
  49                allocate_resource(&iomem_resource, res, size, min, max, \
  50                                align, NULL, NULL)
  51#endif /* !CONFIG_IOMMU_CCIO */
  52
  53void *sba_get_iommu(struct parisc_device *dev);
  54
  55#endif /* _IOMMU_H */
  56