dma-debug: add checks for sync_single_*

Impact: add debug callbacks for dma_sync_single_for_* functions

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

2 files changed, 41 insertions, 0 deletions

diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index cb72dfd87326..0eee7af5143f 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -49,6 +49,14 @@ extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
 extern void debug_dma_free_coherent(struct device *dev, size_t size,
                                     void *virt, dma_addr_t addr);
 
+extern void debug_dma_sync_single_for_cpu(struct device *dev,
+                                          dma_addr_t dma_handle, size_t size,
+                                          int direction);
+
+extern void debug_dma_sync_single_for_device(struct device *dev,
+                                             dma_addr_t dma_handle,
+                                             size_t size, int direction);
+
 #else /* CONFIG_DMA_API_DEBUG */
 
 static inline void dma_debug_init(u32 num_entries)
@@ -89,6 +97,18 @@ static inline void debug_dma_free_coherent(struct device *dev, size_t size,
 {
 }
 
+static inline void debug_dma_sync_single_for_cpu(struct device *dev,
+                                                 dma_addr_t dma_handle,
+                                                 size_t size, int direction)
+{
+}
+
+static inline void debug_dma_sync_single_for_device(struct device *dev,
+                                                    dma_addr_t dma_handle,
+                                                    size_t size, int direction)
+{
+}
+
 #endif /* CONFIG_DMA_API_DEBUG */
 
 #endif /* __DMA_DEBUG_H */
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 44af837f68ef..714cfb6ca0e4 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -737,3 +737,24 @@ void debug_dma_free_coherent(struct device *dev, size_t size,
 }
 EXPORT_SYMBOL(debug_dma_free_coherent);
 
+void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
+                                   size_t size, int direction)
+{
+        if (unlikely(global_disable))
+                return;
+
+        check_sync(dev, dma_handle, size, 0, direction, true);
+}
+EXPORT_SYMBOL(debug_dma_sync_single_for_cpu);
+
+void debug_dma_sync_single_for_device(struct device *dev,
+                                      dma_addr_t dma_handle, size_t size,
+                                      int direction)
+{
+        if (unlikely(global_disable))
+                return;
+
+        check_sync(dev, dma_handle, size, 0, direction, false);
+}
+EXPORT_SYMBOL(debug_dma_sync_single_for_device);
+