path: root/include/asm-sh/scatterlist.h
diff options
authorPaul Mundt <lethal@linux-sh.org>2006-09-27 14:48:09 +0900
committerPaul Mundt <lethal@linux-sh.org>2006-09-27 14:48:09 +0900
commit634bf4f69b925950ddb09ef99ad7516a449a4333 (patch)
tree2a43f2602bf06c7e4430452bcd9f5bc4ab851532 /include/asm-sh/scatterlist.h
parentsh: Fix TCP payload csum bug in csum_partial_copy_generic(). (diff)
sh: Fix libata build.
Drop virt_to_bus() from sg_dma_address() so libata builds. While we're at it, move sg_dma_address() and sg_dma_len() from pci.h to scatterlist.h. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/scatterlist.h')
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-sh/scatterlist.h b/include/asm-sh/scatterlist.h
index 7b91df140022..d19e7cd3b023 100644
--- a/include/asm-sh/scatterlist.h
+++ b/include/asm-sh/scatterlist.h
@@ -10,4 +10,13 @@ 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) */