On Apr 20, 2009, at 12:00 PM, Kumar Gala wrote:
On Apr 20, 2009, at 11:26 AM, Becky Bruce wrote:Minor code to allow enabling swiotlb on mpc86xx, including Kconfig addition for SWIOTLB. Signed-off-by: Becky Bruce <bec...@kernel.crashing.org> --- arch/powerpc/Kconfig | 10 ++++++++++ arch/powerpc/kernel/dma-swiotlb.c | 2 ++ arch/powerpc/platforms/86xx/mpc86xx_hpcn.c | 3 +++ 3 files changed, 15 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 197f6a3..e47c81d 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -292,6 +292,16 @@ config IOMMU_VMERGE config IOMMU_HELPER def_bool PPC64 +config SWIOTLB + bool "SWIOTLB support" + depends on PPC_86xx + 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. +As stated on previous patch, move the bulk of this into 4/5.
Yep.
config PPC_NEED_DMA_SYNC_OPS def_bool y depends on (NOT_COHERENT_CACHE || SWIOTLB)diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/ kernel/dma-swiotlb.cindex 29a68e6..3065d03 100644 --- a/arch/powerpc/kernel/dma-swiotlb.c +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -159,3 +159,5 @@ static int __init setup_bus_notifier(void) return 0; } + +machine_arch_initcall(mpc86xx_hpcn, setup_bus_notifier);Hmm, not sure what we chatted about here, but I don't want to have to add every board into this file to register the bus notifiers.
We talked about this, and this was what we decided on - I don't really like the idea, either, but there's a lot of precedent for it. I'd like to do this differently, but I"m not sure what the solution is - we'd need to look into that more (or perhaps someone here will have some sage advice).
Cheers, B _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
