On May 14, 2009, at 5:42 PM, Becky Bruce wrote:

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 <redacted>
---
arch/powerpc/Kconfig                   |   12 ++-
arch/powerpc/include/asm/dma-mapping.h |   11 ++
arch/powerpc/include/asm/swiotlb.h     |   27 +++++
arch/powerpc/kernel/Makefile           |    1 +
arch/powerpc/kernel/dma-swiotlb.c      |  163 +++++++++++++++++++++++ 
+++++++++
arch/powerpc/kernel/dma.c              |    2 +-
arch/powerpc/kernel/setup_32.c         |    6 +
arch/powerpc/kernel/setup_64.c         |    6 +
8 files changed, 226 insertions(+), 2 deletions(-)
create mode 100644 arch/powerpc/include/asm/swiotlb.h
create mode 100644 arch/powerpc/kernel/dma-swiotlb.c

Acked-by: Kumar Gala <redacted>

- k