drivers/parisc/iommu.h

   1 #ifndef _IOMMU_H
   2 #define _IOMMU_H 1
   3
   4 #include <linux/pci.h>
   5
   6 struct parisc_device;
   7 struct ioc;
   8
   9 static 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
  29 static 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
  39 void *ccio_get_iommu(const struct parisc_device *dev);
  40 int ccio_request_resource(const struct parisc_device *dev,
  41                 struct resource *res);
  42 int 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
  53 void *sba_get_iommu(struct parisc_device *dev);
  54
  55 #endif /* _IOMMU_H */