diff options
Diffstat (limited to 'drivers/parisc/iommu.h')
| -rw-r--r-- | drivers/parisc/iommu.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/parisc/iommu.h b/drivers/parisc/iommu.h new file mode 100644 index 000000000000..5a38b635e963 --- /dev/null +++ b/drivers/parisc/iommu.h @@ -0,0 +1,51 @@ +#ifndef _IOMMU_H +#define _IOMMU_H 1 + +#include <linux/pci.h> + +struct parisc_device; +struct ioc; + +static inline void *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; +} + +#define GET_IOC(dev) ({ \ + void *__pdata = parisc_walk_tree(dev); \ + __pdata ? HBA_DATA(__pdata)->iommu : NULL; \ +}) + +#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 */ |