From: Milton Miller Date: Fri, 24 Jun 2011 09:05:23 +0000 (+0000) Subject: dma-mapping: Add get_required_mask if arch overrides default X-Git-Tag: v3.2-rc1~34^2~99 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3a8f7558e475b68254d8bc3a2211f3f89bf67a71;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git dma-mapping: Add get_required_mask if arch overrides default If an architecture sets ARCH_HAS_DMA_GET_REQUIRED_MASK and has settable dma_map_ops, the required mask may change by the ops implementation. For example, a system that always has an mmu inline may only require 32 bits while a swiotlb would desire bits to cover all of memory. Therefore add the field if the architecture does not use the generic definition of dma_get_required_mask. The first use will by by powerpc. Note that this does add some dependency on the order in which files are visible here. Signed-off-by: Milton Miller Signed-off-by: Nishanth Aravamudan Signed-off-by: Benjamin Herrenschmidt Acked-by: FUJITA Tomonori --- diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 347fdc3..aa32fec 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -41,6 +41,9 @@ struct dma_map_ops { int (*mapping_error)(struct device *dev, dma_addr_t dma_addr); int (*dma_supported)(struct device *dev, u64 mask); int (*set_dma_mask)(struct device *dev, u64 mask); +#ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK + u64 (*get_required_mask)(struct device *dev); +#endif int is_phys; };