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dmaengine: allow dma support for async_tx to be toggled

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Provide a config option for blocking the allocation of dma channels to
the async_tx api.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2009-03-25 09:13:25 -07:00
parent 06164f3194
commit 729b5d1b8e
3 changed files with 32 additions and 3 deletions
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18
include/linux/dmaengine.h
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@@ -288,6 +288,24 @@ static inline void net_dmaengine_put(void)
}
#endif
#ifdef CONFIG_ASYNC_TX_DMA
#define async_dmaengine_get() dmaengine_get()
#define async_dmaengine_put() dmaengine_put()
#define async_dma_find_channel(type) dma_find_channel(type)
#else
static inline void async_dmaengine_get(void)
{
}
static inline void async_dmaengine_put(void)
{
}
static inline struct dma_chan *
async_dma_find_channel(enum dma_transaction_type type)
{
return NULL;
}
#endif
dma_cookie_t dma_async_memcpy_buf_to_buf(struct dma_chan *chan,
void *dest, void *src, size_t len);
dma_cookie_t dma_async_memcpy_buf_to_pg(struct dma_chan *chan,