Commit-ID: f62bc980e6fd26434012c0d5676ecb17179d9ee4
Gitweb: http://git.kernel.org/tip/f62bc980e6fd26434012c0d5676ecb17179d9ee4
Author: Joerg Roedel <joerg.roedel@xxxxxxx>
AuthorDate: Fri, 9 Jan 2009 14:14:49 +0100
Commit: Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Thu, 5 Mar 2009 20:35:18 +0100
dma-debug: add checking for map/unmap_page/single
Impact: add debug callbacks for dma_{un}map_[page|single]
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
include/linux/dma-debug.h | 23 +++++++++++++++++++
lib/dma-debug.c | 53 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 76 insertions(+), 0 deletions(-)
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index 345d538..65f7352 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -28,12 +28,35 @@ struct device;
extern void dma_debug_init(u32 num_entries);
+extern void debug_dma_map_page(struct device *dev, struct page *page,
+ size_t offset, size_t size,
+ int direction, dma_addr_t dma_addr,
+ bool map_single);
+
+extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
+ size_t size, int direction, bool map_single);
+
+
#else /* CONFIG_DMA_API_DEBUG */
static inline void dma_debug_init(u32 num_entries)
{
}
+static inline void debug_dma_map_page(struct device *dev, struct page *page,
+ size_t offset, size_t size,
+ int direction, dma_addr_t dma_addr,
+ bool map_single)
+{
+}
+
+static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
+ size_t size, int direction,
+ bool map_single)
+{
+}
+
+
#endif /* CONFIG_DMA_API_DEBUG */
#endif /* __DMA_DEBUG_H */
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index d0cb47a..a2ed2b7 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -566,3 +566,56 @@ out:
}
+void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
+ size_t size, int direction, dma_addr_t dma_addr,
+ bool map_single)
+{
+ struct dma_debug_entry *entry;
+
+ if (unlikely(global_disable))
+ return;
+
+ if (unlikely(dma_mapping_error(dev, dma_addr)))
+ return;
+
+ entry = dma_entry_alloc();
+ if (!entry)
+ return;
+
+ entry->dev = dev;
+ entry->type = dma_debug_page;
+ entry->paddr = page_to_phys(page) + offset;
+ entry->dev_addr = dma_addr;
+ entry->size = size;
+ entry->direction = direction;
+
+ if (map_single) {
+ entry->type = dma_debug_single;
+ check_for_stack(dev, page_address(page) + offset);
+ }
+
+ add_dma_entry(entry);
+}
+EXPORT_SYMBOL(debug_dma_map_page);
+
+void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
+ size_t size, int direction, bool map_single)
+{
+ struct dma_debug_entry ref = {
+ .type = dma_debug_page,
+ .dev = dev,
+ .dev_addr = addr,
+ .size = size,
+ .direction = direction,
+ };
+
+ if (unlikely(global_disable))
+ return;
+
+ if (map_single)
+ ref.type = dma_debug_single;
+
+ check_unmap(&ref);
+}
+EXPORT_SYMBOL(debug_dma_unmap_page);
+
--
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