diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-10-31 16:10:10 +0000 |
|---|---|---|
| committer | Venkata(Muni) Anda <muni@nvidia.com> | 2010-01-12 20:47:21 -0800 |
| commit | af77cdd16d15582ebdb3ea8d290442baf712a45b (patch) | |
| tree | c3de265210e64bbb59eb18f47338983e3f4c787b /arch/arm/common/dmabounce.c | |
| parent | 86e02e3f5571cd80e7f2f832071cb63224290a55 (diff) | |
ARM: dma-mapping: split dma_unmap_page() from dma_unmap_single()
We will need to treat dma_unmap_page() differently from dma_unmap_single()
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-By: Jamie Iles <jamie@jamieiles.com>
Diffstat (limited to 'arch/arm/common/dmabounce.c')
| -rw-r--r-- | arch/arm/common/dmabounce.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index f030f0775be7..e9a96d8b7c9b 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -341,6 +341,22 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, } EXPORT_SYMBOL(dma_map_single); +/* + * see if a mapped address was really a "safe" buffer and if so, copy + * the data from the safe buffer back to the unsafe buffer and free up + * the safe buffer. (basically return things back to the way they + * should be) + */ +void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, 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); + + unmap_single(dev, dma_addr, size, dir); +} +EXPORT_SYMBOL(dma_unmap_single); + dma_addr_t dma_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir) { @@ -359,8 +375,7 @@ EXPORT_SYMBOL(dma_map_page); * the safe buffer. (basically return things back to the way they * should be) */ - -void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, +void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir) { dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n", @@ -368,7 +383,7 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, unmap_single(dev, dma_addr, size, dir); } -EXPORT_SYMBOL(dma_unmap_single); +EXPORT_SYMBOL(dma_unmap_page); int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr, unsigned long off, size_t sz, enum dma_data_direction dir) |