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| author | Becky Bruce <beckyb@kernel.crashing.org> | 2009-05-14 12:42:28 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-09 16:49:18 +1000 |
| commit | ec3cf2ece22a8ede7478bf38e2a818986322662b (patch) | |
| tree | 76654ac60da3d2ac27f49769f825215d55b03276 /arch/powerpc/Kconfig | |
| parent | 1babddbc2e83ab98fc4dd0a3e9bd7b2d30be7e32 (diff) | |
| download | linux-ec3cf2ece22a8ede7478bf38e2a818986322662b.tar.bz2 | |
powerpc: Add support for swiotlb on 32-bit
This patch includes the basic infrastructure to use swiotlb
bounce buffering on 32-bit powerpc. It is not yet enabled on
any platforms. Probably the most interesting bit is the
addition of addr_needs_map to dma_ops - we need this as
a dma_op because the decision of whether or not an addr
can be mapped by a device is device-specific.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index ff755398ce28..93a61898b259 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -300,9 +300,19 @@ config IOMMU_VMERGE config IOMMU_HELPER def_bool PPC64 +config SWIOTLB + bool "SWIOTLB support" + default n + select IOMMU_HELPER + ---help--- + Support for IO bounce buffering for systems without an IOMMU. + This allows us to DMA to the full physical address space on + platforms where the size of a physical address is larger + than the bus address. Not all platforms support this. + config PPC_NEED_DMA_SYNC_OPS def_bool y - depends on NOT_COHERENT_CACHE + depends on (NOT_COHERENT_CACHE || SWIOTLB) config HOTPLUG_CPU bool "Support for enabling/disabling CPUs" |