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authorRobin Murphy <robin.murphy@arm.com>2015-10-01 22:13:58 +0300
committerJoerg Roedel <jroedel@suse.de>2015-10-15 17:41:04 +0300
commit0db2e5d18f76a66ca945447d9f610bed0a94ca5a (patch)
tree0c3d896165c2bd071eacdb06879082fcc0c32a12 /drivers/iommu/Kconfig
parent25cb62b76430a91cc6195f902e61c2cb84ade622 (diff)
downloadlinux-0db2e5d18f76a66ca945447d9f610bed0a94ca5a.tar.xz
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/Kconfig7
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