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Commit a31fba5d authored by Joerg Roedel's avatar Joerg Roedel
Browse files

dma-debug: add checks for sync_single_sg_* 



Impact: add debug callbacks for dma_sync_sg_* functions

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 948408ba

include/linux/dma-debug.h

+20 −0
Original line number Diff line number Diff line
@@ -68,6 +68,14 @@ extern void debug_dma_sync_single_range_for_device(struct device *dev, 
						   unsigned long offset,

						   size_t size, int direction);



extern void debug_dma_sync_sg_for_cpu(struct device *dev,

				      struct scatterlist *sg,

				      int nelems, int direction);



extern void debug_dma_sync_sg_for_device(struct device *dev,

					 struct scatterlist *sg,

					 int nelems, int direction);



#else /* CONFIG_DMA_API_DEBUG */



static inline void dma_debug_init(u32 num_entries)
@@ -136,6 +144,18 @@ static inline void debug_dma_sync_single_range_for_device(struct device *dev, 
{

}



static inline void debug_dma_sync_sg_for_cpu(struct device *dev,

					     struct scatterlist *sg,

					     int nelems, int direction)

{

}



static inline void debug_dma_sync_sg_for_device(struct device *dev,

						struct scatterlist *sg,

						int nelems, int direction)

{

}



#endif /* CONFIG_DMA_API_DEBUG */



#endif /* __DMA_DEBUG_H */

lib/dma-debug.c

+32 −0
Original line number Diff line number Diff line
@@ -782,3 +782,35 @@ void debug_dma_sync_single_range_for_device(struct device *dev, 
}

EXPORT_SYMBOL(debug_dma_sync_single_range_for_device);



void debug_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,

			       int nelems, int direction)

{

	struct scatterlist *s;

	int i;



	if (unlikely(global_disable))

		return;



	for_each_sg(sg, s, nelems, i) {

		check_sync(dev, s->dma_address, s->dma_length, 0,

				direction, true);

	}

}

EXPORT_SYMBOL(debug_dma_sync_sg_for_cpu);



void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,

				  int nelems, int direction)

{

	struct scatterlist *s;

	int i;



	if (unlikely(global_disable))

		return;



	for_each_sg(sg, s, nelems, i) {

		check_sync(dev, s->dma_address, s->dma_length, 0,

				direction, false);

	}

}

EXPORT_SYMBOL(debug_dma_sync_sg_for_device);