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async_tx: allow architecture specific async_tx_find_channel implementations

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The source and destination addresses are included to allow channel
selection based on address alignment.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Dan Williams 2008-02-02 19:49:59 -07:00
parent d4c56f97ff
commit 47437b2c9a
5 changed files with 22 additions and 9 deletions
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11
include/linux/async_tx.h
View file

@ -62,9 +62,15 @@ enum async_tx_flags {
void async_tx_issue_pending_all(void);
enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
void async_tx_run_dependencies(struct dma_async_tx_descriptor *tx);
#ifdef CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL
#include <asm/async_tx.h>
#else
#define async_tx_find_channel(dep, type, dst, dst_count, src, src_count, len) \
__async_tx_find_channel(dep, type)
struct dma_chan *
async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
__async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
enum dma_transaction_type tx_type);
#endif /* CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL */
#else
static inline void async_tx_issue_pending_all(void)
{
@ -86,7 +92,8 @@ async_tx_run_dependencies(struct dma_async_tx_descriptor *tx,
static inline struct dma_chan *
async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
enum dma_transaction_type tx_type)
enum dma_transaction_type tx_type, struct page **dst, int dst_count,
struct page **src, int src_count, size_t len)
{
return NULL;
}