1 files changed, 23 insertions, 0 deletions
diff --git a/include/asm-parisc/scatterlist.h b/include/asm-parisc/scatterlist.h
new file mode 100644
index 0000000..236c1d0
--- /dev/null
+++ b/include/asm-parisc/scatterlist.h
@@ -0,0 +1,23 @@
+#ifndef _ASM_PARISC_SCATTERLIST_H
+#define _ASM_PARISC_SCATTERLIST_H
+
+#include <asm/page.h>
+
+struct scatterlist {
+	struct page *page;
+	unsigned int offset;
+
+	unsigned int length;
+
+	/* an IOVA can be 64-bits on some PA-Risc platforms. */
+	dma_addr_t iova;	/* I/O Virtual Address */
+	__u32      iova_length; /* bytes mapped */
+};
+
+#define sg_virt_addr(sg) ((unsigned long)(page_address(sg->page) + sg->offset))
+#define sg_dma_address(sg) ((sg)->iova)
+#define sg_dma_len(sg)     ((sg)->iova_length)
+
+#define ISA_DMA_THRESHOLD (~0UL)
+
+#endif /* _ASM_PARISC_SCATTERLIST_H */