Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

[linux-2.6-omap-h63xx.git] / include / asm-sh / scatterlist.h

diff --git a/include/asm-sh/scatterlist.h b/include/asm-sh/scatterlist.h
index 7b91df140022be81858b656f7497f61c637f731a..b9ae53c38365c3ac28b3a5269d9b561cf38a998f 100644 (file)
--- a/include/asm-sh/scatterlist.h
+++ b/include/asm-sh/scatterlist.h
@@ -1,6 +1,8 @@
 #ifndef __ASM_SH_SCATTERLIST_H
 #define __ASM_SH_SCATTERLIST_H
 
+#include <asm/types.h>
+
 struct scatterlist {
     struct page * page; /* Location for highmem page, if any */
     unsigned int offset;/* for highmem, page offset */
@@ -10,4 +12,13 @@ struct scatterlist {
 
 #define ISA_DMA_THRESHOLD (0x1fffffff)
 
+/* 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, or alternatively stop on the first sg_dma_len(sg) which
+ * is 0.
+ */
+#define sg_dma_address(sg)     ((sg)->dma_address)
+#define sg_dma_len(sg)         ((sg)->length)
+
 #endif /* !(__ASM_SH_SCATTERLIST_H) */