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| 1 | /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2022-2025 HiSilicon Limited. |
| 4 | */ |
| 5 | |
| 6 | #ifndef _UAPI_DMA_BENCHMARK_H |
| 7 | #define _UAPI_DMA_BENCHMARK_H |
| 8 | |
| 9 | #include <linux/types.h> |
| 10 | |
| 11 | #define DMA_MAP_BENCHMARK _IOWR('d', 1, struct map_benchmark) |
| 12 | #define DMA_MAP_MAX_THREADS 1024 |
| 13 | #define DMA_MAP_MAX_SECONDS 300 |
| 14 | #define DMA_MAP_MAX_TRANS_DELAY (10 * NSEC_PER_MSEC) |
| 15 | |
| 16 | #define DMA_MAP_BIDIRECTIONAL 0 |
| 17 | #define DMA_MAP_TO_DEVICE 1 |
| 18 | #define DMA_MAP_FROM_DEVICE 2 |
| 19 | |
| 20 | struct map_benchmark { |
| 21 | __u64 avg_map_100ns; /* average map latency in 100ns */ |
| 22 | __u64 map_stddev; /* standard deviation of map latency */ |
| 23 | __u64 avg_unmap_100ns; /* as above */ |
| 24 | __u64 unmap_stddev; |
| 25 | __u32 threads; /* how many threads will do map/unmap in parallel */ |
| 26 | __u32 seconds; /* how long the test will last */ |
| 27 | __s32 node; /* which numa node this benchmark will run on */ |
| 28 | __u32 dma_bits; /* DMA addressing capability */ |
| 29 | __u32 dma_dir; /* DMA data direction */ |
| 30 | __u32 dma_trans_ns; /* time for DMA transmission in ns */ |
| 31 | __u32 granule; /* how many PAGE_SIZE will do map/unmap once a time */ |
| 32 | __u8 expansion[76]; /* For future use */ |
| 33 | }; |
| 34 | |
| 35 | #endif /* _UAPI_DMA_BENCHMARK_H */ |
| 36 |
Warning: This file is not a C or C++ file. It does not have highlighting.