diff options
Diffstat (limited to 'include/uapi/linux/map_benchmark.h')
| -rw-r--r-- | include/uapi/linux/map_benchmark.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/include/uapi/linux/map_benchmark.h b/include/uapi/linux/map_benchmark.h index c2d91088a40d..4b17829a9f17 100644 --- a/include/uapi/linux/map_benchmark.h +++ b/include/uapi/linux/map_benchmark.h @@ -17,6 +17,12 @@ #define DMA_MAP_TO_DEVICE 1 #define DMA_MAP_FROM_DEVICE 2 +enum { + DMA_MAP_BENCH_SINGLE_MODE, + DMA_MAP_BENCH_SG_MODE, + DMA_MAP_BENCH_MODE_MAX +}; + struct map_benchmark { __u64 avg_map_100ns; /* average map latency in 100ns */ __u64 map_stddev; /* standard deviation of map latency */ @@ -28,8 +34,11 @@ struct map_benchmark { __u32 dma_bits; /* DMA addressing capability */ __u32 dma_dir; /* DMA data direction */ __u32 dma_trans_ns; /* time for DMA transmission in ns */ - __u32 granule; /* how many PAGE_SIZE will do map/unmap once a time */ - __u8 expansion[76]; /* For future use */ + __u32 granule; /* - SINGLE_MODE: number of pages mapped/unmapped per operation + * - SG_MODE: number of scatterlist entries (each maps one page) + */ + __u8 map_mode; /* the mode of dma map */ + __u8 expansion[75]; /* For future use */ }; #endif /* _UAPI_DMA_BENCHMARK_H */ |