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| author | Robin Murphy <robin.murphy@arm.com> | 2015-10-01 20:13:58 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-10-15 16:41:04 +0200 |
| commit | 0db2e5d18f76a66ca945447d9f610bed0a94ca5a (patch) | |
| tree | 0c3d896165c2bd071eacdb06879082fcc0c32a12 /drivers/iommu/Kconfig | |
| parent | 25cb62b76430a91cc6195f902e61c2cb84ade622 (diff) | |
| download | lwn-0db2e5d18f76a66ca945447d9f610bed0a94ca5a.tar.gz lwn-0db2e5d18f76a66ca945447d9f610bed0a94ca5a.zip | |
iommu: Implement common IOMMU ops for DMA mapping
Taking inspiration from the existing arch/arm code, break out some
generic functions to interface the DMA-API to the IOMMU-API. This will
do the bulk of the heavy lifting for IOMMU-backed dma-mapping.
Since associating an IOVA allocator with an IOMMU domain is a fairly
common need, rather than introduce yet another private structure just to
do this for ourselves, extend the top-level struct iommu_domain with the
notion. A simple opaque cookie allows reuse by other IOMMU API users
with their various different incompatible allocator types.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index d9da766719c8..7414f33acfba 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -49,6 +49,13 @@ config OF_IOMMU def_bool y depends on OF && IOMMU_API +# IOMMU-agnostic DMA-mapping layer +config IOMMU_DMA + bool + depends on NEED_SG_DMA_LENGTH + select IOMMU_API + select IOMMU_IOVA + config FSL_PAMU bool "Freescale IOMMU support" depends on PPC32 |