1 files changed, 22 insertions, 0 deletions

diff --git a/include/asm-x86_64/scatterlist.h b/include/asm-x86_64/scatterlist.h
new file mode 100644
index 000000000000..49d89f8129cd
--- /dev/null
+++ b/include/asm-x86_64/scatterlist.h
@@ -0,0 +1,22 @@
+#ifndef _X8664_SCATTERLIST_H
+#define _X8664_SCATTERLIST_H
+
+struct scatterlist {
+    struct page         *page;
+    unsigned int        offset;
+    unsigned int        length;
+    dma_addr_t          dma_address;
+    unsigned int        dma_length;
+};
+
+#define ISA_DMA_THRESHOLD (0x00ffffff)
+
+/* These macros should be used after a pci_map_sg call has been done
+ * to get bus addresses of each of the SG entries and their lengths.
+ * You should only work with the number of sg entries pci_map_sg
+ * returns.
+ */
+#define sg_dma_address(sg)     ((sg)->dma_address)
+#define sg_dma_len(sg)         ((sg)->dma_length)
+
+#endif