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dma-debug: Expose nr_total_entries in debugfs

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Expose nr_total_entries in debugfs, so that {num,min}_free_entries
become even more meaningful to users interested in current/maximum
utilisation. This becomes even more relevant once nr_total_entries
may change at runtime beyond just the existing AMD GART debug code.

Suggested-by: John Garry <[email protected]>
Signed-off-by: Robin Murphy <[email protected]>
Tested-by: Qian Cai <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Robin Murphy 2018-12-10 14:00:28 +00:00 • committed by Christoph Hellwig
commit 9f191555ba
2 changed files with 10 additions and 0 deletions
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Documentation/DMA-API.txt
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@ -723,6 +723,9 @@ dma-api/min_free_entries This read-only file can be read to get the
dma-api/num_free_entries The current number of free dma_debug_entries
in the allocator.
dma-api/nr_total_entries The total number of dma_debug_entries in the
allocator, both free and used.
dma-api/driver-filter You can write a name of a driver into this file
to limit the debug output to requests from that
particular driver. Write an empty string to