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Diffstat (limited to 'include/uapi/linux/map_benchmark.h')
| -rw-r--r-- | include/uapi/linux/map_benchmark.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/uapi/linux/map_benchmark.h b/include/uapi/linux/map_benchmark.h new file mode 100644 index 000000000000..4b17829a9f17 --- /dev/null +++ b/include/uapi/linux/map_benchmark.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ +/* + * Copyright (C) 2022-2025 HiSilicon Limited. + */ + +#ifndef _UAPI_DMA_BENCHMARK_H +#define _UAPI_DMA_BENCHMARK_H + +#include <linux/types.h> + +#define DMA_MAP_BENCHMARK _IOWR('d', 1, struct map_benchmark) +#define DMA_MAP_MAX_THREADS 1024 +#define DMA_MAP_MAX_SECONDS 300 +#define DMA_MAP_MAX_TRANS_DELAY (10 * NSEC_PER_MSEC) + +#define DMA_MAP_BIDIRECTIONAL 0 +#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 */ + __u64 avg_unmap_100ns; /* as above */ + __u64 unmap_stddev; + __u32 threads; /* how many threads will do map/unmap in parallel */ + __u32 seconds; /* how long the test will last */ + __s32 node; /* which numa node this benchmark will run on */ + __u32 dma_bits; /* DMA addressing capability */ + __u32 dma_dir; /* DMA data direction */ + __u32 dma_trans_ns; /* time for DMA transmission in ns */ + __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 */ |