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Commit 6bfd4498 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

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



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

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 972aa45c

include/linux/dma-debug.h

+16 −0
Original line number Diff line number Diff line
@@ -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 */

lib/dma-debug.c

+45 −0
Original line number Diff line number Diff line
@@ -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);