X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-frv%2Fscatterlist.h;h=4bca8a28546c2474e6300d041e117186175dc0ea;hb=45e575ab9bfada5a5ef1b6174f8e749b1ecf0864;hp=99ba76edc42a4c94a333571e9c5c1d2658e465ca;hpb=02bae2129710018883f9536969de7e6acf9304ca;p=linux-2.6-omap-h63xx.git

diff --git a/include/asm-frv/scatterlist.h b/include/asm-frv/scatterlist.h
index 99ba76edc42..4bca8a28546 100644
--- a/include/asm-frv/scatterlist.h
+++ b/include/asm-frv/scatterlist.h
@@ -16,8 +16,7 @@
  *
  * can be rewritten as
  *
- * sg_set_page(virt_to_page(some_ptr));
- * sg->offset = (unsigned long) some_ptr & ~PAGE_MASK;
+ * sg_set_buf(sg, some_ptr, length);
  *
  * and that's it. There's no excuse for not highmem enabling YOUR driver. /jens
  */
@@ -32,6 +31,16 @@ struct scatterlist {
 	unsigned int	length;
 };
 
+/*
+ * 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)
+
 #define ISA_DMA_THRESHOLD (0xffffffffUL)
 
 #endif /* !_ASM_SCATTERLIST_H */