diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/common/dmabounce.c | 46 | ||||
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 24 |
2 files changed, 16 insertions, 54 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index c7f23ced0a36..20d967376fa9 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -444,50 +444,6 @@ dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, unmap_single(dev, dma_addr, size, dir); } -int -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - 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) { - struct page *page = sg_page(s); - unsigned int offset = s->offset; - unsigned int length = s->length; - void *ptr = page_address(page) + offset; - - s->dma_address = map_single(dev, ptr, length, dir); - } - - return nents; -} - -void -dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, - 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; - - unmap_single(dev, dma_addr, length, dir); - } -} - void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_addr, unsigned long offset, size_t size, enum dma_data_direction dir) @@ -662,8 +618,6 @@ dmabounce_unregister_dev(struct device *dev) EXPORT_SYMBOL(dma_map_single); EXPORT_SYMBOL(dma_unmap_single); -EXPORT_SYMBOL(dma_map_sg); -EXPORT_SYMBOL(dma_unmap_sg); EXPORT_SYMBOL(dma_sync_sg_for_cpu); EXPORT_SYMBOL(dma_sync_sg_for_device); EXPORT_SYMBOL(dmabounce_register_dev); diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 7bf3e6fdfb57..c9c1206e358c 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -513,7 +513,6 @@ void dma_cache_maint(const void *start, size_t size, int direction) } EXPORT_SYMBOL(dma_cache_maint); -#ifndef CONFIG_DMABOUNCE /** * dma_map_sg - map a set of SG buffers for streaming mode DMA * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices @@ -534,16 +533,20 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir) { struct scatterlist *s; - int i; + int i, j; for_each_sg(sg, s, nents, i) { - s->dma_address = page_to_dma(dev, sg_page(s)) + s->offset; - - if (!arch_is_coherent()) - dma_cache_maint(sg_virt(s), s->length, dir); + s->dma_address = dma_map_page(dev, sg_page(s), s->offset, + s->length, dir); + if (dma_mapping_error(dev, s->dma_address)) + goto bad_mapping; } - return nents; + + bad_mapping: + for_each_sg(sg, s, i, j) + dma_unmap_page(dev, sg_dma_address(s), sg_dma_len(s), dir); + return 0; } EXPORT_SYMBOL(dma_map_sg); @@ -560,10 +563,15 @@ EXPORT_SYMBOL(dma_map_sg); void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir) { - /* nothing to do */ + struct scatterlist *s; + int i; + + for_each_sg(sg, s, nents, i) + dma_unmap_page(dev, sg_dma_address(s), sg_dma_len(s), dir); } 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 |