patch-2.4.0-test8 linux/include/asm-arm/scatterlist.h

• Lines: 29
• Date: Sun Sep 3 11:19:11 2000
• Orig file: v2.4.0-test7/linux/include/asm-arm/scatterlist.h
• Orig date: Tue Jan 20 16:39:43 1998

diff -u --recursive --new-file v2.4.0-test7/linux/include/asm-arm/scatterlist.h linux/include/asm-arm/scatterlist.h
@@ -1,12 +1,24 @@
 #ifndef _ASMARM_SCATTERLIST_H
 #define _ASMARM_SCATTERLIST_H
 
+#include <asm/types.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;	/* virtual address		 */
+	char		*alt_address;	/* indirect dma address, or NULL */
+	dma_addr_t	dma_address;	/* 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)
 
 #define ISA_DMA_THRESHOLD (0xffffffff)