Pull dma-mapping updates from Marek Szyprowski: - More DMA mapping API refactoring to physical addresses as the primary interface instead of page+offset parameters. This time dma_map_ops callbacks are converted to physical addresses, what in turn results also in some simplification of architecture specific code (Leon Romanovsky and Jason Gunthorpe) - Clarify that dma_map_benchmark is not a kernel self-test, but standalone tool (Qinxin Xia) * tag 'dma-mapping-6.19-2025-12-05' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux: dma-mapping: remove unused map_page callback xen: swiotlb: Convert mapping routine to rely on physical address x86: Use physical address for DMA mapping sparc: Use physical address DMA mapping powerpc: Convert to physical address DMA mapping parisc: Convert DMA map_page to map_phys interface MIPS/jazzdma: Provide physical address directly alpha: Convert mapping routine to rely on physical address dma-mapping: remove unused mapping resource callbacks xen: swiotlb: Switch to physical address mapping callbacks ARM: dma-mapping: Switch to physical address mapping callbacks ARM: dma-mapping: Reduce struct page exposure in arch_sync_dma*() dma-mapping: convert dummy ops to physical address mapping dma-mapping: prepare dma_map_ops to conversion to physical address tools/dma: move dma_map_benchmark from selftests to tools/dma
Showing the changes to include/uapi (1 of 31 files). Show all
Unified · Split
| @@ -0,0 +1,35 @@ | ||
| 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 */ | |