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>

diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index e9b9035..4985c6c 100644 (file)
--- 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 d1c0ac1..9d11e89 100644 (file)
--- 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);
+