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Diffstat (limited to 'include/asm-parisc/scatterlist.h')
-rw-r--r--include/asm-parisc/scatterlist.h23
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 00000000000..236c1d0fba3
--- /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 */