dma-debug: add checking for [alloc|free]_coherent

Impact: add debug callbacks for dma_[alloc|free]_coherent

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

2 files changed, 61 insertions, 0 deletions

diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index ee9fdb328549..cb72dfd87326 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -43,6 +43,12 @@ extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
 extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
                                int nelems, int dir);
 
+extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
+                                     dma_addr_t dma_addr, void *virt);
+
+extern void debug_dma_free_coherent(struct device *dev, size_t size,
+                                    void *virt, dma_addr_t addr);
+
 #else /* CONFIG_DMA_API_DEBUG */
 
 static inline void dma_debug_init(u32 num_entries)
@@ -73,6 +79,16 @@ static inline void debug_dma_unmap_sg(struct device *dev,
 {
 }
 
+static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
+                                            dma_addr_t dma_addr, void *virt)
+{
+}
+
+static inline void debug_dma_free_coherent(struct device *dev, size_t size,
+                                           void *virt, dma_addr_t addr)
+{
+}
+
 #endif /* CONFIG_DMA_API_DEBUG */
 
 #endif /* __DMA_DEBUG_H */
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 26e40e93e0f2..44af837f68ef 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -692,3 +692,48 @@ void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
 }
 EXPORT_SYMBOL(debug_dma_unmap_sg);
 
+void debug_dma_alloc_coherent(struct device *dev, size_t size,
+                              dma_addr_t dma_addr, void *virt)
+{
+        struct dma_debug_entry *entry;
+
+        if (unlikely(global_disable))
+                return;
+
+        if (unlikely(virt == NULL))
+                return;
+
+        entry = dma_entry_alloc();
+        if (!entry)
+                return;
+
+        entry->type      = dma_debug_coherent;
+        entry->dev       = dev;
+        entry->paddr     = virt_to_phys(virt);
+        entry->size      = size;
+        entry->dev_addr  = dma_addr;
+        entry->direction = DMA_BIDIRECTIONAL;
+
+        add_dma_entry(entry);
+}
+EXPORT_SYMBOL(debug_dma_alloc_coherent);
+
+void debug_dma_free_coherent(struct device *dev, size_t size,
+                         void *virt, dma_addr_t addr)
+{
+        struct dma_debug_entry ref = {
+                .type           = dma_debug_coherent,
+                .dev            = dev,
+                .paddr          = virt_to_phys(virt),
+                .dev_addr       = addr,
+                .size           = size,
+                .direction      = DMA_BIDIRECTIONAL,
+        };
+
+        if (unlikely(global_disable))
+                return;
+
+        check_unmap(&ref);
+}
+EXPORT_SYMBOL(debug_dma_free_coherent);
+