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    Subject[PATCH 11/16] dma-debug: add checking for [alloc|free]_coherent
    Date
    Impact: add debug callbacks for dma_[alloc|free]_coherent

    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    ---
    include/linux/dma-debug.h | 16 ++++++++++++++++
    lib/dma-debug.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
    2 files changed, 61 insertions(+), 0 deletions(-)

    diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
    index b2131f4..a28a701 100644
    --- a/include/linux/dma-debug.h
    +++ b/include/linux/dma-debug.h
    @@ -40,6 +40,12 @@ extern void debug_map_sg(struct device *dev, struct scatterlist *sg,
    extern void debug_unmap_sg(struct device *dev, struct scatterlist *sglist,
    int nelems, int dir);

    +extern void debug_alloc_coherent(struct device *dev, size_t size,
    + dma_addr_t dma_addr, void *virt);
    +
    +extern void debug_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)
    @@ -68,6 +74,16 @@ static inline void debug_unmap_sg(struct device *dev,
    {
    }

    +static inline void debug_alloc_coherent(struct device *dev, size_t size,
    + dma_addr_t dma_addr, void *virt)
    +{
    +}
    +
    +static inline void debug_free_coherent(struct device *dev, size_t size,
    + void *virt, dma_addr_t addr)
    +{
    +}
    +
    #endif /* CONFIG_DMA_API_DEBUG */

    #endif /* __DMA_DEBUG_H */
    diff --git a/lib/dma-debug.c b/lib/dma-debug.c
    index e6d45f9..a4a5b0f 100644
    --- a/lib/dma-debug.c
    +++ b/lib/dma-debug.c
    @@ -604,3 +604,48 @@ void debug_unmap_sg(struct device *dev, struct scatterlist *sglist,
    }
    EXPORT_SYMBOL(debug_unmap_sg);

    +void debug_alloc_coherent(struct device *dev, size_t size,
    + dma_addr_t dma_addr, void *virt)
    +{
    + struct dma_debug_entry *entry;
    +
    + if (global_disable)
    + return;
    +
    + if (dma_addr == bad_dma_address)
    + return;
    +
    + entry = dma_entry_alloc();
    + if (!entry)
    + return;
    +
    + entry->type = dma_debug_coherent;
    + entry->dev = dev;
    + entry->cpu_addr = virt;
    + entry->size = size;
    + entry->dev_addr = dma_addr;
    + entry->direction = DMA_BIDIRECTIONAL;
    +
    + add_dma_entry(entry);
    +}
    +EXPORT_SYMBOL(debug_alloc_coherent);
    +
    +void debug_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,
    + .cpu_addr = virt,
    + .dev_addr = addr,
    + .size = size,
    + .direction = DMA_BIDIRECTIONAL,
    + };
    +
    + if (global_disable)
    + return;
    +
    + check_unmap(&ref);
    +}
    +EXPORT_SYMBOL(debug_free_coherent);
    +
    --
    1.5.6.4



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