patch-2.4.13 linux/include/asm-ppc/scatterlist.h

• Lines: 36
• Date: Sun Oct 21 10:13:07 2001
• Orig file: v2.4.12/linux/include/asm-ppc/scatterlist.h
• Orig date: Mon May 21 15:02:06 2001

diff -u --recursive --new-file v2.4.12/linux/include/asm-ppc/scatterlist.h linux/include/asm-ppc/scatterlist.h
@@ -1,5 +1,5 @@
 /*
- * BK Id: SCCS/s.scatterlist.h 1.5 05/17/01 18:14:25 cort
+ * BK Id: SCCS/s.scatterlist.h 1.9 10/15/01 22:51:33 paulus
  */
 #ifdef __KERNEL__
 #ifndef _PPC_SCATTERLIST_H
@@ -8,12 +8,24 @@
 #include <asm/dma.h>
 
 struct scatterlist {
-    char *  address;    /* Location data is to be transferred to */
-    char * alt_address; /* Location of actual if address is a 
-			 * dma indirect buffer.  NULL otherwise */
-    unsigned int length;
+	char *address;		/* Location data is to be transferred to,
+				 * or NULL for highmem page */
+	struct page * page;	/* Location for highmem page, if any */
+	unsigned int offset;	/* for highmem, page offset */
+
+	dma_addr_t dma_address;	/* phys/bus dma address		 */
+	unsigned int length;	/* 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)
 
 #endif /* !(_PPC_SCATTERLIST_H) */
 #endif /* __KERNEL__ */