diff options
| author |   David Woodhouse <dwmw2@infradead.org> | 2009-02-12 16:19:13 +0100 |
|---|---|---|
| committer |   Joerg Roedel <joerg.roedel@amd.com> | 2009-03-17 12:56:39 +0100 |
| commit | ac26c18bd35d982d1ba06020a992b1085fefc3e2 (patch) | |
| tree | 33f7fe1a22848c7dfdd002298f27efff103480a4 /include/linux/dma-debug.h | |
| parent | dma-debug: add checks for sync_single_sg_* (diff) | |
| download | wireguard-linux-ac26c18bd35d982d1ba06020a992b1085fefc3e2.tar.xz wireguard-linux-ac26c18bd35d982d1ba06020a992b1085fefc3e2.zip | |
dma-debug: add function to dump dma mappings
This adds a function to dump the DMA mappings that the debugging code is
aware of -- either for a single device, or for _all_ devices.
This can be useful for debugging -- sticking a call to it in the DMA
page fault handler, for example, to see if the faulting address _should_
be mapped or not, and hence work out whether it's IOMMU bugs we're
seeing, or driver bugs.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/dma-debug.h')
| -rw-r--r-- | include/linux/dma-debug.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h index 4985c6c5237e..46a11c10da04 100644 --- a/include/linux/dma-debug.h +++ b/include/linux/dma-debug.h @@ -76,6 +76,8 @@ extern void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, int direction); +extern void debug_dma_dump_mappings(struct device *dev); + #else /* CONFIG_DMA_API_DEBUG */ static inline void dma_debug_init(u32 num_entries) @@ -156,6 +158,10 @@ static inline void debug_dma_sync_sg_for_device(struct device *dev, { } +static inline void debug_dma_dump_mappings(struct device *dev) +{ +} + #endif /* CONFIG_DMA_API_DEBUG */ #endif /* __DMA_DEBUG_H */ |