powerpc: Add sync_*_for_* to dma_ops

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We need to swap these out once we start using swiotlb, so add
them to dma_ops.  Create CONFIG_PPC_NEED_DMA_SYNC_OPS Kconfig
option; this is currently enabled automatically if we're
CONFIG_NOT_COHERENT_CACHE.  In the future, this will also
be enabled for builds that need swiotlb.  If PPC_NEED_DMA_SYNC_OPS
is not defined, the dma_sync_*_for_* ops compile to nothing.
Otherwise, they access the dma_ops pointers for the sync ops.

This patch also changes dma_sync_single_range_* to actually
sync the range - previously it was using a generous
dma_sync_single.  dma_sync_single_* is now implemented
as a dma_sync_single_range with an offset of 0.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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This commit is contained in:

Becky Bruce 2008-11-20 06:49:16 +00:00 • committed by Paul Mackerras

parent c4d04be11f

commit 15e09c0eca

3 changed files with 92 additions and 31 deletions

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4

arch/powerpc/Kconfig

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95

arch/powerpc/include/asm/dma-mapping.h

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26

arch/powerpc/kernel/dma.c

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