diff options
| author | Jayachandran C <jchandra@broadcom.com> | 2013-06-10 06:28:08 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-06-13 17:46:40 +0200 |
| commit | 4954a9a211f1863e3ca3958fd56ad06e1bddc22d (patch) | |
| tree | c5ce63b246124561b138da90056d17cf2ee4084d /arch/mips/mm/dma-default.c | |
| parent | 0cecddecd3d0f4e2d9499ad2f226969e82910e79 (diff) | |
| download | op-kernel-dev-4954a9a211f1863e3ca3958fd56ad06e1bddc22d.zip op-kernel-dev-4954a9a211f1863e3ca3958fd56ad06e1bddc22d.tar.gz | |
MIPS: Support SWIOTLB in default dma operations
Provide a default implementation of phys_to_dma and dma_to_phys in
mach-generic/dma_coherence.h.
If CONFIG_NEED_SG_DMA_LENGTH is defined, the dma_length field in
struct scatterlist is used. Set this up in mips_dma_map_sg so that
the default mips DMA ops can be used when SWIOTLB is enabled.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5409/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/dma-default.c')
| -rw-r--r-- | arch/mips/mm/dma-default.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c index caf92ec..aaccf1c 100644 --- a/arch/mips/mm/dma-default.c +++ b/arch/mips/mm/dma-default.c @@ -246,6 +246,9 @@ static int mips_dma_map_sg(struct device *dev, struct scatterlist *sg, if (!plat_device_is_coherent(dev)) __dma_sync(sg_page(sg), sg->offset, sg->length, direction); +#ifdef CONFIG_NEED_SG_DMA_LENGTH + sg->dma_length = sg->length; +#endif sg->dma_address = plat_map_dma_mem_page(dev, sg_page(sg)) + sg->offset; } |
