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dma-debug: add checks for sync_single_sg_*

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Impact: add debug callbacks for dma_sync_sg_* functions

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2009-01-09 15:01:12 +01:00
parent 948408ba3e
commit a31fba5d68
2 changed files with 52 additions and 0 deletions
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20
include/linux/dma-debug.h
View File

@@ -68,6 +68,14 @@ extern void debug_dma_sync_single_range_for_device(struct device *dev,
unsigned long offset, unsigned long offset,
size_t size, int direction); 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 */ #else /* CONFIG_DMA_API_DEBUG */
static inline void dma_debug_init(u32 num_entries) 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 /* CONFIG_DMA_API_DEBUG */
#endif /* __DMA_DEBUG_H */ #endif /* __DMA_DEBUG_H */

32
lib/dma-debug.c
View File

@@ -782,3 +782,35 @@ void debug_dma_sync_single_range_for_device(struct device *dev,
} }
EXPORT_SYMBOL(debug_dma_sync_single_range_for_device); 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);