diff options
| -rw-r--r-- | arch/arm/common/dmabounce.c | 48 | ||||
| -rw-r--r-- | arch/arm/include/asm/dma-mapping.h | 11 | ||||
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 10 |
3 files changed, 31 insertions, 38 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 20d967376fa9..0a98148279b1 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -468,45 +468,23 @@ void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_addr, } EXPORT_SYMBOL(dma_sync_single_range_for_device); -void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction dir) +int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr, + unsigned long off, size_t sz, enum dma_data_direction dir) { - struct scatterlist *s; - int i; - - dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n", - __func__, sg, nents, dir); - - BUG_ON(dir == DMA_NONE); - - for_each_sg(sg, s, nents, i) { - dma_addr_t dma_addr = s->dma_address; - unsigned int length = s->length; - - sync_single(dev, dma_addr, length, dir); - } + dev_dbg(dev, "%s(dma=%#lx,off=%#lx,sz=%zx,dir=%x)\n", + __func__, addr, off, sz, dir); + return sync_single(dev, addr, off + sz, dir); } +EXPORT_SYMBOL(dmabounce_sync_for_cpu); -void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction dir) +int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr, + unsigned long off, size_t sz, enum dma_data_direction dir) { - struct scatterlist *s; - int i; - - dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n", - __func__, sg, nents, dir); - - BUG_ON(dir == DMA_NONE); - - for_each_sg(sg, s, nents, i) { - dma_addr_t dma_addr = s->dma_address; - unsigned int length = s->length; - - sync_single(dev, dma_addr, length, dir); - } + dev_dbg(dev, "%s(dma=%#lx,off=%#lx,sz=%zx,dir=%x)\n", + __func__, addr, off, sz, dir); + return sync_single(dev, addr, off + sz, dir); } +EXPORT_SYMBOL(dmabounce_sync_for_device); static int dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev, const char *name, @@ -618,8 +596,6 @@ dmabounce_unregister_dev(struct device *dev) EXPORT_SYMBOL(dma_map_single); EXPORT_SYMBOL(dma_unmap_single); -EXPORT_SYMBOL(dma_sync_sg_for_cpu); -EXPORT_SYMBOL(dma_sync_sg_for_device); EXPORT_SYMBOL(dmabounce_register_dev); EXPORT_SYMBOL(dmabounce_unregister_dev); diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 856ee1bdee57..29404f71ab87 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -410,6 +410,17 @@ extern void dmabounce_unregister_dev(struct device *); * */ extern int dma_needs_bounce(struct device*, dma_addr_t, size_t); + +/* + * Private functions + */ +int dmabounce_sync_for_cpu(struct device *, dma_addr_t, unsigned long, + size_t, enum dma_data_direction); +int dmabounce_sync_for_device(struct device *, dma_addr_t, unsigned long, + size_t, enum dma_data_direction); +#else +#define dmabounce_sync_for_cpu(dev,dma,off,sz,dir) (1) +#define dmabounce_sync_for_device(dev,dma,off,sz,dir) (1) #endif /* CONFIG_DMABOUNCE */ #endif /* __KERNEL__ */ diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index c9c1206e358c..0e28cf33f7dd 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -571,7 +571,6 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, } EXPORT_SYMBOL(dma_unmap_sg); -#ifndef CONFIG_DMABOUNCE /** * dma_sync_sg_for_cpu * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices @@ -586,6 +585,10 @@ void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int i; for_each_sg(sg, s, nents, i) { + if (!dmabounce_sync_for_cpu(dev, sg_dma_address(s), 0, + sg_dma_len(s), dir)) + continue; + if (!arch_is_coherent()) dma_cache_maint(sg_virt(s), s->length, dir); } @@ -606,9 +609,12 @@ void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int i; for_each_sg(sg, s, nents, i) { + if (!dmabounce_sync_for_device(dev, sg_dma_address(s), 0, + sg_dma_len(s), dir)) + continue; + if (!arch_is_coherent()) dma_cache_maint(sg_virt(s), s->length, dir); } } EXPORT_SYMBOL(dma_sync_sg_for_device); -#endif |