patch-2.4.20 linux-2.4.20/include/asm-parisc/scatterlist.h
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- Lines: 32
- Date:
Thu Nov 28 15:53:15 2002
- Orig file:
linux-2.4.19/include/asm-parisc/scatterlist.h
- Orig date:
Fri Oct 12 15:35:54 2001
diff -urN linux-2.4.19/include/asm-parisc/scatterlist.h linux-2.4.20/include/asm-parisc/scatterlist.h
@@ -1,8 +1,20 @@
#ifndef _ASM_PARISC_SCATTERLIST_H
#define _ASM_PARISC_SCATTERLIST_H
+#include <asm/page.h>
+
struct scatterlist {
- char * address; /* Location data is to be transferred to */
+ /* This will disappear in 2.5.x */
+ char *address;
+
+ /* page/offset only valid if ADDRESS member is NULL.
+ ** Needed to support CONFIG_HIGHMEM on x386.
+ ** I still think davem is a dork for forcing other
+ ** arches to add this to 2.4.x. -ggg
+ */
+ struct page *page;
+ unsigned int offset;
+
unsigned int length;
/* an IOVA can be 64-bits on some PA-Risc platforms. */
@@ -10,6 +22,9 @@
__u32 iova_length; /* bytes mapped */
};
+#define sg_virt_addr(sg) (((sg)->address) ? ((sg)->address) : \
+ ((sg)->page->virtual + (sg)->offset))
+
#define sg_dma_address(sg) ((sg)->iova)
#define sg_dma_len(sg) ((sg)->iova_length)
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