From 9dd428680573d7867ee5e40fa3f059a98301d416 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 10 Aug 2008 12:18:26 +0100 Subject: [ARM] dma-mapping: provide sync_range APIs Convert the existing dma_sync_single_for_* APIs to the new range based APIs, and make the dma_sync_single_for_* API a superset of it. Signed-off-by: Russell King --- arch/arm/common/dmabounce.c | 38 ++++++++++++++++++++------------------ 1 file changed, 20 insertions(+), 18 deletions(-) (limited to 'arch/arm/common') diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 1ea6482cdf6..aecc6c3f908 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -321,9 +321,8 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, } } -static inline void -sync_single(struct device *dev, dma_addr_t dma_addr, size_t size, - enum dma_data_direction dir) +static int sync_single(struct device *dev, dma_addr_t dma_addr, size_t size, + enum dma_data_direction dir) { struct dmabounce_device_info *device_info = dev->archdata.dmabounce; struct safe_buffer *buf = NULL; @@ -383,8 +382,9 @@ sync_single(struct device *dev, dma_addr_t dma_addr, size_t size, * No need to sync the safe buffer - it was allocated * via the coherent allocators. */ + return 0; } else { - dma_cache_maint(dma_to_virt(dev, dma_addr), size, dir); + return 1; } } @@ -474,25 +474,29 @@ dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, } } -void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_addr, size_t size, - enum dma_data_direction 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) { - dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n", - __func__, (void *) dma_addr, size, dir); + dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n", + __func__, dma_addr, offset, size, dir); - sync_single(dev, dma_addr, size, dir); + if (sync_single(dev, dma_addr, offset + size, dir)) + dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir); } +EXPORT_SYMBOL(dma_sync_single_range_for_cpu); -void -dma_sync_single_for_device(struct device *dev, dma_addr_t dma_addr, size_t size, - enum dma_data_direction dir) +void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_addr, + unsigned long offset, size_t size, + enum dma_data_direction dir) { - dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n", - __func__, (void *) dma_addr, size, dir); + dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n", + __func__, dma_addr, offset, size, dir); - sync_single(dev, dma_addr, size, dir); + if (sync_single(dev, dma_addr, offset + size, dir)) + dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir); } +EXPORT_SYMBOL(dma_sync_single_range_for_device); void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents, @@ -644,8 +648,6 @@ EXPORT_SYMBOL(dma_map_single); EXPORT_SYMBOL(dma_unmap_single); EXPORT_SYMBOL(dma_map_sg); EXPORT_SYMBOL(dma_unmap_sg); -EXPORT_SYMBOL(dma_sync_single_for_cpu); -EXPORT_SYMBOL(dma_sync_single_for_device); EXPORT_SYMBOL(dma_sync_sg_for_cpu); EXPORT_SYMBOL(dma_sync_sg_for_device); EXPORT_SYMBOL(dmabounce_register_dev); -- cgit v1.2.3