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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 | 20 ++++++++++++++++++++
    lib/dma-debug.c | 32 ++++++++++++++++++++++++++++++++
    2 files changed, 52 insertions(+), 0 deletions(-)

    diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
    index 4daaa82..8a8aae4 100644
    --- a/include/linux/dma-debug.h
    +++ b/include/linux/dma-debug.h
    @@ -67,6 +67,14 @@ 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)
    @@ -135,6 +143,18 @@ 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 */
    diff --git a/lib/dma-debug.c b/lib/dma-debug.c
    index 125b6a2..469e5b9 100644
    --- a/lib/dma-debug.c
    +++ b/lib/dma-debug.c
    @@ -719,3 +719,35 @@ 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);
    +
    --
    1.5.6.4



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