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Subject[PATCH 09/16] dma-debug: add checking for map/unmap_single
Date
Impact: add debug callbacks for dma_{un}map_single
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
include/linux/dma-debug.h | 19 +++++++++++++++++++
lib/dma-debug.c | 41 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 60 insertions(+), 0 deletions(-)
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index 345d538..82ae9ca 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -28,12 +28,31 @@ struct device;

extern void dma_debug_init(u32 num_entries);

+extern void debug_map_single(struct device *dev, void *ptr, size_t size,
+ int direction, dma_addr_t dma_addr);
+
+extern void debug_unmap_single(struct device *dev, dma_addr_t addr,
+ size_t size, int direction);
+
+
#else /* CONFIG_DMA_API_DEBUG */

static inline void dma_debug_init(u32 num_entries)
{
}

+static inline void debug_map_single(struct device *dev, void *ptr,
+ size_t size, int direction,
+ dma_addr_t dma_addr)
+{
+}
+
+static inline void debug_unmap_single(struct device *dev, dma_addr_t addr,
+ 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 9f730a4..d4d14e5 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -510,3 +510,44 @@ out:

}

+void debug_map_single(struct device *dev, void *ptr, size_t size,
+ int direction, dma_addr_t dma_addr)
+{
+ struct dma_debug_entry *entry;
+
+ if (global_disable)
+ return;
+
+ entry = dma_entry_alloc();
+ if (!entry)
+ return;
+
+ entry->dev = dev;
+ entry->type = dma_debug_single;
+ entry->cpu_addr = ptr;
+ entry->dev_addr = dma_addr;
+ entry->size = size;
+ entry->direction = direction;
+
+ add_dma_entry(entry);
+}
+EXPORT_SYMBOL(debug_map_single);
+
+void debug_unmap_single(struct device *dev, dma_addr_t addr,
+ size_t size, int direction)
+{
+ struct dma_debug_entry ref = {
+ .type = dma_debug_single,
+ .dev = dev,
+ .dev_addr = addr,
+ .size = size,
+ .direction = direction,
+ };
+
+ if (global_disable)
+ return;
+
+ check_unmap(&ref);
+}
+EXPORT_SYMBOL(debug_unmap_single);
+
--
1.5.6.4



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