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author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-08-10 11:18:26 (GMT) |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-08-10 13:05:14 (GMT) |
commit | 9dd428680573d7867ee5e40fa3f059a98301d416 (patch) | |
tree | cedec454e5490d2f09b3cad4b6c2fed46a6f857b /arch/arm | |
parent | 98ed7d4b1a4eebc1ac25929b6968673bef4d54c3 (diff) | |
download | linux-fsl-qoriq-9dd428680573d7867ee5e40fa3f059a98301d416.tar.xz |
[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 <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/common/dmabounce.c | 38 | ||||
-rw-r--r-- | arch/arm/include/asm/dma-mapping.h | 39 |
2 files changed, 48 insertions, 29 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 1ea6482..aecc6c3 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); diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 6f45959..7b95d20 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -351,11 +351,12 @@ extern void dma_unmap_sg(struct device *, struct scatterlist *, int, enum dma_da /** - * dma_sync_single_for_cpu + * dma_sync_single_range_for_cpu * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices * @handle: DMA address of buffer - * @size: size of buffer to map - * @dir: DMA transfer direction + * @offset: offset of region to start sync + * @size: size of region to sync + * @dir: DMA transfer direction (same as passed to dma_map_single) * * Make physical memory consistent for a single streaming mode DMA * translation after a transfer. @@ -369,25 +370,41 @@ extern void dma_unmap_sg(struct device *, struct scatterlist *, int, enum dma_da */ #ifndef CONFIG_DMABOUNCE static inline void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size, - enum dma_data_direction dir) +dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle, + unsigned long offset, size_t size, + enum dma_data_direction dir) { if (!arch_is_coherent()) - dma_cache_maint(dma_to_virt(dev, handle), size, dir); + dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir); } static inline void -dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, - enum dma_data_direction dir) +dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle, + unsigned long offset, size_t size, + enum dma_data_direction dir) { if (!arch_is_coherent()) - dma_cache_maint(dma_to_virt(dev, handle), size, dir); + dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir); } #else -extern void dma_sync_single_for_cpu(struct device*, dma_addr_t, size_t, enum dma_data_direction); -extern void dma_sync_single_for_device(struct device*, dma_addr_t, size_t, enum dma_data_direction); +extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction); +extern void dma_sync_single_range_for_device(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction); #endif +static inline void +dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size, + enum dma_data_direction dir) +{ + dma_sync_single_range_for_cpu(dev, handle, 0, size, dir); +} + +static inline void +dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, + enum dma_data_direction dir) +{ + dma_sync_single_range_for_device(dev, handle, 0, size, dir); +} + /** * dma_sync_sg_for_cpu |