linux-kernel - [PATCH 11/16] dma-debug: add checking for [alloc|free]

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Date:	Mon, 19 Jan 2009 15:46:58 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	mingo@...hat.com, linux-kernel@...r.kernel.org
CC:	fujita.tomonori@....ntt.co.jp, dwmw2@...radead.org,
	iommu@...ts.linux-foundation.org,
	Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 11/16] dma-debug: add checking for [alloc|free]_coherent

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

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 include/linux/dma-debug.h |   16 ++++++++++++++++
 lib/dma-debug.c           |   45 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 0 deletions(-)

diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index 61f559d..15fa361 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -42,6 +42,12 @@ 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)
@@ -72,6 +78,16 @@ 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 f3e0145..01a79d1 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -629,3 +629,48 @@ 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);
+
-- 
1.5.6.4


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