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author | Becky Bruce <becky.bruce@freescale.com> | 2008-11-20 06:49:16 +0000 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2008-12-03 20:46:36 +1100 |
commit | 15e09c0ecaab4a1b4a7ed69db536c38948b92279 (patch) | |
tree | 9cf8f2cbfe002e220db4d001d08fbc50bfaf4433 /arch/powerpc/include/asm/dma-mapping.h | |
parent | c4d04be11f99cc9ce4e3801a5da235727db704a9 (diff) | |
download | kernel_samsung_smdk4412-15e09c0ecaab4a1b4a7ed69db536c38948b92279.zip kernel_samsung_smdk4412-15e09c0ecaab4a1b4a7ed69db536c38948b92279.tar.gz kernel_samsung_smdk4412-15e09c0ecaab4a1b4a7ed69db536c38948b92279.tar.bz2 |
powerpc: Add sync_*_for_* to dma_ops
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>
Diffstat (limited to 'arch/powerpc/include/asm/dma-mapping.h')
-rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 93 |
1 files changed, 62 insertions, 31 deletions
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index 3c4a2c2..9063184 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -76,6 +76,22 @@ struct dma_mapping_ops { dma_addr_t dma_address, size_t size, enum dma_data_direction direction, struct dma_attrs *attrs); +#ifdef CONFIG_PPC_NEED_DMA_SYNC_OPS + void (*sync_single_range_for_cpu)(struct device *hwdev, + dma_addr_t dma_handle, unsigned long offset, + size_t size, + enum dma_data_direction direction); + void (*sync_single_range_for_device)(struct device *hwdev, + dma_addr_t dma_handle, unsigned long offset, + size_t size, + enum dma_data_direction direction); + void (*sync_sg_for_cpu)(struct device *hwdev, + struct scatterlist *sg, int nelems, + enum dma_data_direction direction); + void (*sync_sg_for_device)(struct device *hwdev, + struct scatterlist *sg, int nelems, + enum dma_data_direction direction); +#endif }; /* @@ -282,47 +298,78 @@ static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, dma_unmap_sg_attrs(dev, sg, nhwentries, direction, NULL); } +#ifdef CONFIG_PPC_NEED_DMA_SYNC_OPS static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) { - BUG_ON(direction == DMA_NONE); - __dma_sync(bus_to_virt(dma_handle), size, direction); + struct dma_mapping_ops *dma_ops = get_dma_ops(dev); + + BUG_ON(!dma_ops); + dma_ops->sync_single_range_for_cpu(dev, dma_handle, 0, + size, direction); } static inline void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) { - BUG_ON(direction == DMA_NONE); - __dma_sync(bus_to_virt(dma_handle), size, direction); + struct dma_mapping_ops *dma_ops = get_dma_ops(dev); + + BUG_ON(!dma_ops); + dma_ops->sync_single_range_for_device(dev, dma_handle, + 0, size, direction); } static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction) { - struct scatterlist *sg; - int i; - - BUG_ON(direction == DMA_NONE); + struct dma_mapping_ops *dma_ops = get_dma_ops(dev); - for_each_sg(sgl, sg, nents, i) - __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); + BUG_ON(!dma_ops); + dma_ops->sync_sg_for_cpu(dev, sgl, nents, direction); } static inline void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction) { - struct scatterlist *sg; - int i; + struct dma_mapping_ops *dma_ops = get_dma_ops(dev); - BUG_ON(direction == DMA_NONE); + BUG_ON(!dma_ops); + dma_ops->sync_sg_for_device(dev, sgl, nents, direction); +} + +static inline void dma_sync_single_range_for_cpu(struct device *dev, + dma_addr_t dma_handle, unsigned long offset, size_t size, + enum dma_data_direction direction) +{ + struct dma_mapping_ops *dma_ops = get_dma_ops(dev); - for_each_sg(sgl, sg, nents, i) - __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); + BUG_ON(!dma_ops); + dma_ops->sync_single_range_for_cpu(dev, dma_handle, + offset, size, direction); +} + +static inline void dma_sync_single_range_for_device(struct device *dev, + dma_addr_t dma_handle, unsigned long offset, size_t size, + enum dma_data_direction direction) +{ + struct dma_mapping_ops *dma_ops = get_dma_ops(dev); + + BUG_ON(!dma_ops); + dma_ops->sync_single_range_for_device(dev, dma_handle, offset, + size, direction); } +#else /* CONFIG_PPC_NEED_DMA_SYNC_OPS */ +#define dma_sync_single_for_cpu(d, h, s, dir) ((void)0) +#define dma_sync_single_for_device(d, h, s, dir) ((void)0) +#define dma_sync_single_range_for_cpu(d, h, o, s, dir) ((void)0) +#define dma_sync_single_range_for_device(d, h, o, s, dir) ((void)0) +#define dma_sync_sg_for_cpu(d, s, n, dir) ((void)0) +#define dma_sync_sg_for_device(d, s, n, dir) ((void)0) +#endif static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { @@ -356,22 +403,6 @@ static inline int dma_get_cache_alignment(void) #endif } -static inline void dma_sync_single_range_for_cpu(struct device *dev, - dma_addr_t dma_handle, unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - /* just sync everything for now */ - dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction); -} - -static inline void dma_sync_single_range_for_device(struct device *dev, - dma_addr_t dma_handle, unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - /* just sync everything for now */ - dma_sync_single_for_device(dev, dma_handle, offset + size, direction); -} - static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) { |