Messages in this thread Patch in this message | | | Date | Fri, 2 Oct 2015 13:11:42 -0700 | From | Nishanth Aravamudan <> | Subject | [PATCH 1/5 v2] dma-mapping: add generic dma_get_page_shift API |
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Drivers like NVMe need to be able to determine the page size used for DMA transfers. Add a new API that defaults to return PAGE_SHIFT on all architectures.
Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index b1bc954..86e4e97 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -355,4 +355,11 @@ static inline int dma_set_mask(struct device *dev, u64 mask) } #endif +#ifndef HAVE_ARCH_DMA_GET_PAGE_SHIFT +static inline unsigned long dma_get_page_shift(struct device *dev) +{ + return PAGE_SHIFT; +} +#endif + #endif
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