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Subject[PATCH 14/16] dma-debug: add checks for sync_single_sg_*
Date
Impact: add debug callbacks for dma_sync_sg_* functions

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
include/linux/dma-debug.h | 19 +++++++++++++++++++
lib/dma-debug.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 51 insertions(+), 0 deletions(-)

diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index b9c221a..bdba8c8 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -64,6 +64,13 @@ extern void debug_sync_single_range_for_device(struct device *dev,
unsigned long offset,
size_t size, int direction);

+extern void debug_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+ int nelems, int direction);
+
+extern void debug_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)
@@ -130,6 +137,18 @@ static inline void debug_sync_single_range_for_device(struct device *dev,
{
}

+static inline void debug_sync_sg_for_cpu(struct device *dev,
+ struct scatterlist *sg,
+ int nelems, int direction)
+{
+}
+
+static inline void debug_sync_sg_for_device(struct device *dev,
+ struct scatterlist *sg,
+ int nelems, int direction)
+{
+}
+
#endif /* CONFIG_DMA_API_DEBUG */

#endif /* __DMA_DEBUG_H */
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 6f73bed..e40c88c 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -692,3 +692,35 @@ void debug_sync_single_range_for_device(struct device *dev,
}
EXPORT_SYMBOL(debug_sync_single_range_for_device);

+void debug_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+ int nelems, int direction)
+{
+ struct scatterlist *s;
+ int i;
+
+ if (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_sync_sg_for_cpu);
+
+void debug_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+ int nelems, int direction)
+{
+ struct scatterlist *s;
+ int i;
+
+ if (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_sync_sg_for_device);
+
--
1.5.6.4



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