}
EXPORT_SYMBOL_GPL(iommu_tce_xchg);
+#ifdef CONFIG_PPC_BOOK3S_64
+long iommu_tce_xchg_rm(struct iommu_table *tbl, unsigned long entry,
+ unsigned long *hpa, enum dma_data_direction *direction)
+{
+ long ret;
+
+ ret = tbl->it_ops->exchange_rm(tbl, entry, hpa, direction);
+
+ if (!ret && ((*direction == DMA_FROM_DEVICE) ||
+ (*direction == DMA_BIDIRECTIONAL))) {
+ struct page *pg = realmode_pfn_to_page(*hpa >> PAGE_SHIFT);
+
+ if (likely(pg)) {
+ SetPageDirty(pg);
+ } else {
+ tbl->it_ops->exchange_rm(tbl, entry, hpa, direction);
+ ret = -EFAULT;
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iommu_tce_xchg_rm);
+#endif
+
int iommu_take_ownership(struct iommu_table *tbl)
{
unsigned long flags, i, sz = (tbl->it_size + 7) >> 3;