linux-2.6.33/dmabounce_sync_for_cpu(arm) の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-2.6.33/dmabounce_sync_for_cpu(arm) へ行く。
• linux-2.6.33/dmabounce_sync_for_cpu(arm) の差分を削除

*参照元 [#u692c950]
#backlinks

*説明 [#vb9b7b1f]
-パス: [[linux-2.6.33/arch/arm/common/dmabounce.c]]
-パス: 
--CONFIG_DMABOUNCE 有効時: [[linux-2.6.33/arch/arm/common/dmabounce.c]]
--CONFIG_DMABOUNCE 無効時: [[linux-2.6.33/arch/arm/include/asm/dma-mapping.h]]

-FIXME: これは何？
--説明


**引数 [#ce7ecf78]
-struct device *dev
--
--[[linux-2.6.33/device]]
-dma_addr_t addr
--
--[[linux-2.6.33/dma_addr_t]]
-unsigned long off
--
-size_t sz
--
-enum dma_data_direction dir
--
--[[linux-2.6.33/dma_data_direction]]


**返り値 [#fda0200e]
-int
--


**参考 [#d310da54]


*実装 [#g7281733]

**CONFIG_DMABOUNCE 有効時: linux-2.6.33/arch/arm/common/dmabounce.c [#v3bbc50f]

 int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
 		unsigned long off, size_t sz, enum dma_data_direction dir)
 {
 	struct safe_buffer *buf;
 
-
--[[linux-2.6.33/safe_buffer]]

 	dev_dbg(dev, "%s(dma=%#x,off=%#lx,sz=%zx,dir=%x)\n",
 		__func__, addr, off, sz, dir);
 
-
--[[linux-2.6.33/dev_dbg()]]

 	buf = find_safe_buffer_dev(dev, addr, __func__);
 	if (!buf)
 		return 1;
 
-
--[[linux-2.6.33/find_safe_buffer_dev()]]

 	BUG_ON(buf->direction != dir);
 
-
--[[linux-2.6.33/BUG_ON()]]

 	dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
 		__func__, buf->ptr, virt_to_dma(dev, buf->ptr),
 		buf->safe, buf->safe_dma_addr);
 
 	DO_STATS(dev->archdata.dmabounce->bounce_count++);
 
-
--[[linux-2.6.33/DO_STATS]]

 	if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) {
 		dev_dbg(dev, "%s: copy back safe %p to unsafe %p size %d\n",
 			__func__, buf->safe + off, buf->ptr + off, sz);
 		memcpy(buf->ptr + off, buf->safe + off, sz);
 	}
-
--[[linux-2.6.33/memcpy()]]
-
--[[linux-2.6.33/DMA_FROM_DEVICE]]
-
--[[linux-2.6.33/DMA_BIDIRECTIONAL]]

 	return 0;
 }
 EXPORT_SYMBOL(dmabounce_sync_for_cpu);
-ライセンスに関係なくシンボルを公開する。
--[[linux-2.6.33/EXPORT_SYMBOL()]]


**CONFIG_DMABOUNCE 無効時: linux-2.6.33/arch/arm/include/asm/dma-mapping.h [#f8785ff2]
 static inline int dmabounce_sync_for_cpu(struct device *d, dma_addr_t addr,
 	unsigned long offset, size_t size, enum dma_data_direction dir)
 {
 	return 1;
 }


*コメント [#mf63c152]