#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>
for (i = 0; i < nents; i++) {
char *virt;
- sg[i].dma_address = page_to_bus(sg[i].page) + sg[i].offset;
- virt = page_address(sg[i].page) + sg[i].offset;
+ sg[i].dma_address = page_to_bus(sg_page(&sg[i])) + sg[i].offset;
+ virt = sg_virt(&sg[i]);
dma_cache_sync(dev, virt, sg[i].length, direction);
}
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
- dma_cache_sync(dev, bus_to_virt(dma_handle), size, direction);
+ /*
+ * No need to do anything since the CPU isn't supposed to
+ * touch this memory after we flushed it at mapping- or
+ * sync-for-device time.
+ */
}
static inline void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction)
{
- int i;
-
- for (i = 0; i < nents; i++) {
- dma_cache_sync(dev, page_address(sg[i].page) + sg[i].offset,
- sg[i].length, direction);
- }
+ /*
+ * No need to do anything since the CPU isn't supposed to
+ * touch this memory after we flushed it at mapping- or
+ * sync-for-device time.
+ */
}
static inline void
int i;
for (i = 0; i < nents; i++) {
- dma_cache_sync(dev, page_address(sg[i].page) + sg[i].offset,
- sg[i].length, direction);
+ dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, direction);
}
}