Commit-ID: 6bfd4498764d6201399849d2e80fda95db7742c0
Gitweb: http://git.kernel.org/tip/6bfd4498764d6201399849d2e80fda95db7742c0
Author: Joerg Roedel <joerg.roedel@xxxxxxx>
AuthorDate: Fri, 9 Jan 2009 14:38:50 +0100
Commit: Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Thu, 5 Mar 2009 20:35:19 +0100
dma-debug: add checking for [alloc|free]_coherent
Impact: add debug callbacks for dma_[alloc|free]_coherent
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
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 ee9fdb3..cb72dfd 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 26e40e9..44af837 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);
+
--
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