Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1442202
| From | Krzysztof Kozlowski <k.kozlowski@samsung.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v6 46/46] dma-mapping: Document the DMA attributes next to the declaration |
| Date | 2016-07-13 10:50 +0200 |
| Message-ID | <rUo1J-za-101@gated-at.bofh.it> (permalink) |
| References | (41 earlier) <rUo1I-za-85@gated-at.bofh.it> <rUo1J-za-87@gated-at.bofh.it> <rUo1J-za-89@gated-at.bofh.it> <rUo1I-za-67@gated-at.bofh.it> <rUo1J-za-103@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Copy documentation abstract about each DMA attribute from Documentation/DMA-attributes.txt to the place with declaration. Suggested-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> --- include/linux/dma-mapping.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index d8fb67783cb7..66533e18276c 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -14,14 +14,47 @@ /** * List of possible attributes associated with a DMA mapping. The semantics * of each attribute should be defined in Documentation/DMA-attributes.txt. + * + * DMA_ATTR_WRITE_BARRIER: DMA to a memory region with this attribute + * forces all pending DMA writes to complete. */ #define DMA_ATTR_WRITE_BARRIER (1UL << 0) +/* + * DMA_ATTR_WEAK_ORDERING: Specifies that reads and writes to the mapping + * may be weakly ordered, that is that reads and writes may pass each other. + */ #define DMA_ATTR_WEAK_ORDERING (1UL << 1) +/* + * DMA_ATTR_WRITE_COMBINE: Specifies that writes to the mapping may be + * buffered to improve performance. + */ #define DMA_ATTR_WRITE_COMBINE (1UL << 2) +/* + * DMA_ATTR_NON_CONSISTENT: Lets the platform to choose to return either + * consistent or non-consistent memory as it sees fit. + */ #define DMA_ATTR_NON_CONSISTENT (1UL << 3) +/* + * DMA_ATTR_NO_KERNEL_MAPPING: Lets the platform to avoid creating a kernel + * virtual mapping for the allocated buffer. + */ #define DMA_ATTR_NO_KERNEL_MAPPING (1UL << 4) +/* + * DMA_ATTR_SKIP_CPU_SYNC: Allows platform code to skip synchronization of + * the CPU cache for the given buffer assuming that it has been already + * transferred to 'device' domain. + */ #define DMA_ATTR_SKIP_CPU_SYNC (1UL << 5) +/* + * DMA_ATTR_FORCE_CONTIGUOUS: Forces contiguous allocation of the buffer + * in physical memory. + */ #define DMA_ATTR_FORCE_CONTIGUOUS (1UL << 6) +/* + * DMA_ATTR_ALLOC_SINGLE_PAGES: This is a hint to the DMA-mapping subsystem + * that it's probably not worth the time to try to allocate memory to in a way + * that gives better TLB efficiency. + */ #define DMA_ATTR_ALLOC_SINGLE_PAGES (1UL << 7) /* -- 1.9.1
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH v6 12/46] drm/exynos: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 17/46] infiniband: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 31/46] microblaze: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 32/46] mips: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 44/46] remoteproc: qcom: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 46/46] dma-mapping: Document the DMA attributes next to the declaration Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 45/46] dma-mapping: Remove dma_get_attr Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
Re: [PATCH v6 44/46] remoteproc: qcom: Use unsigned long for dma_attrs Bjorn Andersson <bjorn.andersson@linaro.org> - 2016-07-13 19:00 +0200
[PATCH v6 42/46] unicore32: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 43/46] xtensa: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 33/46] mn10300: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 35/46] openrisc: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 38/46] s390: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 41/46] tile: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 39/46] sh: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 40/46] sparc: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 37/46] misc: mic: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 36/46] parisc: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 34/46] nios2: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 28/46] ia64: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 29/46] m68k: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 30/46] metag: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 26/46] h8300: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 27/46] hexagon: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 22/46] powerpc: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 25/46] iommu: intel: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 23/46] video: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 11:00 +0200
[PATCH v6 24/46] x86: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 11:00 +0200
[PATCH v6 18/46] iommu: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 19/46] [media] dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 11:00 +0200
[PATCH v6 20/46] xen: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 11:00 +0200
[PATCH v6 21/46] swiotlb: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 11:00 +0200
Re: [PATCH v6 17/46] infiniband: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 12:50 +0200
Re: [PATCH v6 17/46] infiniband: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 13:10 +0200
[PATCH v6.1] infiniband: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 13:20 +0200
Re: [PATCH v6.1] infiniband: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 13:20 +0200
[PATCH v6.2] infiniband: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 14:00 +0200
[PATCH v6 14/46] drm/msm: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
[PATCH v6 16/46] drm/rockship: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 11:00 +0200
[PATCH v6 15/46] drm/nouveau: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 11:00 +0200
[PATCH v6 13/46] drm/mediatek: dma-mapping: Use unsigned long for dma_attrs Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-07-13 10:50 +0200
csiph-web