2 files changed, 52 insertions, 0 deletions

diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index e9b903503adb..4985c6c5237e 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -68,6 +68,14 @@ extern void debug_dma_sync_single_range_for_device(struct device *dev,
                                                    unsigned long offset,
                                                    size_t size, int direction);
 
+extern void debug_dma_sync_sg_for_cpu(struct device *dev,
+                                      struct scatterlist *sg,
+                                      int nelems, int direction);
+
+extern void debug_dma_sync_sg_for_device(struct device *dev,
+                                         struct scatterlist *sg,
+                                         int nelems, int direction);
+
 #else /* CONFIG_DMA_API_DEBUG */
 
 static inline void dma_debug_init(u32 num_entries)
@@ -136,6 +144,18 @@ static inline void debug_dma_sync_single_range_for_device(struct device *dev,
 {
 }
 
+static inline void debug_dma_sync_sg_for_cpu(struct device *dev,
+                                             struct scatterlist *sg,
+                                             int nelems, int direction)
+{
+}
+
+static inline void debug_dma_sync_sg_for_device(struct device *dev,
+                                                struct scatterlist *sg,
+                                                int nelems, int direction)
+{
+}
+
 #endif /* CONFIG_DMA_API_DEBUG */
 
 #endif /* __DMA_DEBUG_H */
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index d1c0ac1831b7..9d11e89c2ee2 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -782,3 +782,35 @@ void debug_dma_sync_single_range_for_device(struct device *dev,
 }
 EXPORT_SYMBOL(debug_dma_sync_single_range_for_device);
 
+void debug_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+                               int nelems, int direction)
+{
+        struct scatterlist *s;
+        int i;
+
+        if (unlikely(global_disable))
+                return;
+
+        for_each_sg(sg, s, nelems, i) {
+                check_sync(dev, s->dma_address, s->dma_length, 0,
+                                direction, true);
+        }
+}
+EXPORT_SYMBOL(debug_dma_sync_sg_for_cpu);
+
+void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+                                  int nelems, int direction)
+{
+        struct scatterlist *s;
+        int i;
+
+        if (unlikely(global_disable))
+                return;
+
+        for_each_sg(sg, s, nelems, i) {
+                check_sync(dev, s->dma_address, s->dma_length, 0,
+                                direction, false);
+        }
+}
+EXPORT_SYMBOL(debug_dma_sync_sg_for_device);
+