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Date: Sat, 31 Jul 2010 12:30:49 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> Cc: stepanm@...eaurora.org, arnd@...db.de, linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org, dwalker@...eaurora.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/2] arm: msm: Add System MMU support. On Thu, 2010-07-29 at 12:35 +0900, FUJITA Tomonori wrote: > Don't confuse the IOMMU interface with the DMA API that Arnd > mentioned. > > They are not related at all. > > The DMA API is defined in Documentation/DMA-API.txt. > > Arnd told you that include/asm-generic/dma-mapping-common.h is the > library to support the DMA API with multiple IOMMUs. Lots of > architectures (x86, powerpc, sh, alpha, ia64, microblaze, sparc) > use it. Also, some of the iommu layer actually originates from powerpc. Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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