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>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index cbc359f69e00..65cf36502aa6 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -82,6 +82,7 @@ obj-$(CONFIG_SMP)		+= smp.o
 obj-$(CONFIG_KPROBES)           += kprobes.o
 obj-$(CONFIG_PPC_UDBG_16550)    += legacy_serial.o udbg_16550.o
 obj-$(CONFIG_STACKTRACE)        += stacktrace.o
+obj-$(CONFIG_SWIOTLB)           += dma-swiotlb.o
 
 pci64-$(CONFIG_PPC64)           += pci_dn.o isa-bridge.o
 obj-$(CONFIG_PCI)               += pci_$(CONFIG_WORD_SIZE).o $(pci64-y) \