dma-debug: add checks for sync_single_sg_*

Impact: add debug callbacks for dma_sync_sg_* functions

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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 */

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);
+