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-rw-r--r--include/asm-avr32/dma-mapping.h2
-rw-r--r--include/asm-frv/scatterlist.h3
-rw-r--r--include/asm-xtensa/dma-mapping.h2
-rw-r--r--include/linux/scatterlist.h43
4 files changed, 34 insertions, 16 deletions
diff --git a/include/asm-avr32/dma-mapping.h b/include/asm-avr32/dma-mapping.h
index a7131630c05..57dc672bab8 100644
--- a/include/asm-avr32/dma-mapping.h
+++ b/include/asm-avr32/dma-mapping.h
@@ -3,7 +3,7 @@
#include <linux/mm.h>
#include <linux/device.h>
-#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
#include <asm/processor.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
diff --git a/include/asm-frv/scatterlist.h b/include/asm-frv/scatterlist.h
index 99ba76edc42..2e7143b5a7a 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
*/
diff --git a/include/asm-xtensa/dma-mapping.h b/include/asm-xtensa/dma-mapping.h
index 8bd9d2c02a2..3c7d537dd15 100644
--- a/include/asm-xtensa/dma-mapping.h
+++ b/include/asm-xtensa/dma-mapping.h
@@ -11,10 +11,10 @@
#ifndef _XTENSA_DMA_MAPPING_H
#define _XTENSA_DMA_MAPPING_H
-#include <asm/scatterlist.h>
#include <asm/cache.h>
#include <asm/io.h>
#include <linux/mm.h>
+#include <linux/scatterlist.h>
/*
* DMA-consistent mapping functions.
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index df7ddcee7c4..45712317138 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -1,6 +1,7 @@
#ifndef _LINUX_SCATTERLIST_H
#define _LINUX_SCATTERLIST_H
+#include <asm/types.h>
#include <asm/scatterlist.h>
#include <linux/mm.h>
#include <linux/string.h>
@@ -26,18 +27,16 @@
#define SG_MAGIC 0x87654321
/**
- * sg_set_page - Set sg entry to point at given page
- * @sg: SG entry
- * @page: The page
+ * sg_assign_page - Assign a given page to an SG entry
+ * @sg: SG entry
+ * @page: The page
*
* Description:
- * Use this function to set an sg entry pointing at a page, never assign
- * the page directly. We encode sg table information in the lower bits
- * of the page pointer. See sg_page() for looking up the page belonging
- * to an sg entry.
+ * Assign page to sg entry. Also see sg_set_page(), the most commonly used
+ * variant.
*
**/
-static inline void sg_set_page(struct scatterlist *sg, struct page *page)
+static inline void sg_assign_page(struct scatterlist *sg, struct page *page)
{
unsigned long page_link = sg->page_link & 0x3;
@@ -52,6 +51,28 @@ static inline void sg_set_page(struct scatterlist *sg, struct page *page)
sg->page_link = page_link | (unsigned long) page;
}
+/**
+ * sg_set_page - Set sg entry to point at given page
+ * @sg: SG entry
+ * @page: The page
+ * @len: Length of data
+ * @offset: Offset into page
+ *
+ * Description:
+ * Use this function to set an sg entry pointing at a page, never assign
+ * the page directly. We encode sg table information in the lower bits
+ * of the page pointer. See sg_page() for looking up the page belonging
+ * to an sg entry.
+ *
+ **/
+static inline void sg_set_page(struct scatterlist *sg, struct page *page,
+ unsigned int len, unsigned int offset)
+{
+ sg_assign_page(sg, page);
+ sg->offset = offset;
+ sg->length = len;
+}
+
#define sg_page(sg) ((struct page *) ((sg)->page_link & ~0x3))
/**
@@ -64,9 +85,7 @@ static inline void sg_set_page(struct scatterlist *sg, struct page *page)
static inline void sg_set_buf(struct scatterlist *sg, const void *buf,
unsigned int buflen)
{
- sg_set_page(sg, virt_to_page(buf));
- sg->offset = offset_in_page(buf);
- sg->length = buflen;
+ sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
}
/*
@@ -237,7 +256,7 @@ static inline void sg_init_table(struct scatterlist *sgl, unsigned int nents)
* on the sg page.
*
**/
-static inline unsigned long sg_phys(struct scatterlist *sg)
+static inline dma_addr_t sg_phys(struct scatterlist *sg)
{
return page_to_phys(sg_page(sg)) + sg->offset;
}