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MIPS: Synchronize dma_map_page and dma_map_single

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Synchronize dma_map_page/dma_unmap_page and dma_map_single/dma_unmap_single.
This will reduce unnecessary writebacks and invalidates.

[Ralf: make dma_unmap_page an inline function.]

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2009-01-23 00:42:11 +09:00
committed by Ralf Baechle
parent 47740eb887
commit 4f29c057aa
2 changed files with 8 additions and 20 deletions
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19
arch/mips/mm/dma-default.c
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@@ -209,7 +209,7 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long addr;
addr = (unsigned long) page_address(page) + offset;
dma_cache_wback_inv(addr, size);
__dma_sync(addr, size, direction);
}
return plat_map_dma_mem_page(dev, page) + offset;
@@ -217,23 +217,6 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
EXPORT_SYMBOL(dma_map_page);
void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
if (!plat_device_is_coherent(dev) && direction != DMA_TO_DEVICE) {
unsigned long addr;
addr = dma_addr_to_virt(dma_address);
dma_cache_wback_inv(addr, size);
}
plat_unmap_dma_mem(dev, dma_address);
}
EXPORT_SYMBOL(dma_unmap_page);
void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{