Commit c31e74c4 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Linus Torvalds
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Documentation: DMA-API-HOWTO.txt: add multiple types of IOMMUs support 



Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3b9c6c11

Documentation/DMA-API-HOWTO.txt

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   alignment constraints (e.g. the alignment constraints about 64-bit

   objects).



3) Supporting multiple types of IOMMUs



   If your architecture needs to support multiple types of IOMMUs, you

   can use include/linux/asm-generic/dma-mapping-common.h. It's a

   library to support the DMA API with multiple types of IOMMUs. Lots

   of architectures (x86, powerpc, sh, alpha, ia64, microblaze and

   sparc) use it. Choose one to see how it can be used. If you need to

   support multiple types of IOMMUs in a single system, the example of

   x86 or powerpc helps.



			   Closing



This document, and the API itself, would not be in its current

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