+
+/* Generic DMA mapping functions: */
+
+void *
+dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
+{
+ void *ret;
+
+ if (!dev || *dev->dma_mask >= 0xffffffffUL)
+ gfp &= ~GFP_DMA;
+ ret = (void *)__get_free_pages(gfp, get_order(size));
+ if (ret) {
+ memset(ret, 0, size);
+ *dma_handle = virt_to_bus(ret);
+ }
+ return ret;
+}
+
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction direction)
+{
+ int i;
+
+ for (i = 0; i < nents; i++ ) {
+ void *va;
+
+ BUG_ON(!sg[i].page);
+ va = page_address(sg[i].page) + sg[i].offset;
+ sg_dma_address(sg + i) = (dma_addr_t)virt_to_bus(va);
+ sg_dma_len(sg + i) = sg[i].length;
+ }
+
+ return nents;
+}
+
+EXPORT_SYMBOL(dma_map_sg);
+
+int
+dma_set_mask(struct device *dev, u64 mask)
+{
+ if (!dev->dma_mask || !dma_supported(dev, mask))
+ return -EIO;
+
+ *dev->dma_mask = mask;
+
+ return 0;
+}
+EXPORT_SYMBOL(dma_set_mask);
+
+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
+{
+ return NULL;
+}
+
+void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
+{
+}
+
+EXPORT_SYMBOL(pci_iomap);
+EXPORT_SYMBOL(pci_iounmap);