diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2026-03-16 22:06:48 +0300 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2026-03-20 14:05:36 +0300 |
| commit | e6a58fa2556203a7f6731b4071705dc81cca5ca5 (patch) | |
| tree | 404642b67acba4db7d6162c52cc55d4ac8f8f2ab /include/trace | |
| parent | 9bb0a4d6a4433b75274204b083dac8e515d2007d (diff) | |
| download | linux-e6a58fa2556203a7f6731b4071705dc81cca5ca5.tar.xz | |
dma-mapping: Introduce DMA require coherency attribute
The mapping buffers which carry this attribute require DMA coherent system.
This means that they can't take SWIOTLB path, can perform CPU cache overlap
and doesn't perform cache flushing.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260316-dma-debug-overlap-v3-4-1dde90a7f08b@nvidia.com
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/dma.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/trace/events/dma.h b/include/trace/events/dma.h index 8c64bc0721fe..63597b004424 100644 --- a/include/trace/events/dma.h +++ b/include/trace/events/dma.h @@ -33,7 +33,8 @@ TRACE_DEFINE_ENUM(DMA_NONE); { DMA_ATTR_NO_WARN, "NO_WARN" }, \ { DMA_ATTR_PRIVILEGED, "PRIVILEGED" }, \ { DMA_ATTR_MMIO, "MMIO" }, \ - { DMA_ATTR_DEBUGGING_IGNORE_CACHELINES, "CACHELINES_OVERLAP" }) + { DMA_ATTR_DEBUGGING_IGNORE_CACHELINES, "CACHELINES_OVERLAP" }, \ + { DMA_ATTR_REQUIRE_COHERENT, "REQUIRE_COHERENT" }) DECLARE_EVENT_CLASS(dma_map, TP_PROTO(struct device *dev, phys_addr_t phys_addr, dma_addr_t dma_addr, |