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-rw-r--r--lib/dma-noop.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/lib/dma-noop.c b/lib/dma-noop.c
index de26c8b68f34..acc4190e2731 100644
--- a/lib/dma-noop.c
+++ b/lib/dma-noop.c
@@ -7,6 +7,7 @@
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
+#include <linux/pfn.h>
static void *dma_noop_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp,
@@ -16,7 +17,8 @@ static void *dma_noop_alloc(struct device *dev, size_t size,
ret = (void *)__get_free_pages(gfp, get_order(size));
if (ret)
- *dma_handle = virt_to_phys(ret);
+ *dma_handle = virt_to_phys(ret) - PFN_PHYS(dev->dma_pfn_offset);
+
return ret;
}
@@ -32,7 +34,7 @@ static dma_addr_t dma_noop_map_page(struct device *dev, struct page *page,
enum dma_data_direction dir,
unsigned long attrs)
{
- return page_to_phys(page) + offset;
+ return page_to_phys(page) + offset - PFN_PHYS(dev->dma_pfn_offset);
}
static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
@@ -43,34 +45,23 @@ static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nent
struct scatterlist *sg;
for_each_sg(sgl, sg, nents, i) {
+ dma_addr_t offset = PFN_PHYS(dev->dma_pfn_offset);
void *va;
BUG_ON(!sg_page(sg));
va = sg_virt(sg);
- sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va);
+ sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va) - offset;
sg_dma_len(sg) = sg->length;
}
return nents;
}
-static int dma_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return 0;
-}
-
-static int dma_noop_supported(struct device *dev, u64 mask)
-{
- return 1;
-}
-
const struct dma_map_ops dma_noop_ops = {
.alloc = dma_noop_alloc,
.free = dma_noop_free,
.map_page = dma_noop_map_page,
.map_sg = dma_noop_map_sg,
- .mapping_error = dma_noop_mapping_error,
- .dma_supported = dma_noop_supported,
};
EXPORT_SYMBOL(dma_noop_ops);