The patch titled
Documentation: DMA-API-HOWTO.txt: add multiple types of IOMMUs support
has been added to the -mm tree. Its filename is
documentation-dma-api-howtotxt-add-multiple-types-of-iommus-support.patch
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------------------------------------------------------
Subject: Documentation: DMA-API-HOWTO.txt: add multiple types of IOMMUs support
From: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/DMA-API-HOWTO.txt | 10 ++++++++++
1 file changed, 10 insertions(+)
diff -puN Documentation/DMA-API-HOWTO.txt~documentation-dma-api-howtotxt-add-multiple-types-of-iommus-support Documentation/DMA-API-HOWTO.txt
--- a/Documentation/DMA-API-HOWTO.txt~documentation-dma-api-howtotxt-add-multiple-types-of-iommus-support
+++ a/Documentation/DMA-API-HOWTO.txt
@@ -753,6 +753,16 @@ to "Closing".
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
_
Patches currently in -mm which might be from fujita.tomonori@xxxxxxxxxxxxx are
linux-next.patch
dma-mapping-rename-arch_kmalloc_minalign-to-arch_dma_minalign.patch
dma-mapping-unify-dma_get_cache_alignment-implementations.patch
dma-mapping-parisc-set-arch_dma_minalign.patch
drivers-scsi-53c700c-remove-dma_is_consistent-usage.patch
dma-mapping-remove-dma_is_consistent-api.patch
documentation-dma-api-howtotxt-add-multiple-types-of-iommus-support.patch
pci-add-pci-dma-unamp-state-api-to-feature-removal-scheduletxt.patch
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