async_tx: allow architecture specific async_tx_find_channel implementations

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>

4 files changed, 13 insertions, 7 deletions

diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c
index 25dcf33..0f62822 100644
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c
@@ -46,7 +46,8 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
 	struct dma_async_tx_descriptor *depend_tx,
 	dma_async_tx_callback cb_fn, void *cb_param)
 {
-	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMCPY);
+	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMCPY,
+						      &dest, 1, &src, 1, len);
 	struct dma_device *device = chan ? chan->device : NULL;
 	struct dma_async_tx_descriptor *tx = NULL;
 
diff --git a/crypto/async_tx/async_memset.c b/crypto/async_tx/async_memset.c
index 8e98ab0..09c0e83 100644
--- a/crypto/async_tx/async_memset.c
+++ b/crypto/async_tx/async_memset.c
@@ -46,7 +46,8 @@ async_memset(struct page *dest, int val, unsigned int offset,
 	struct dma_async_tx_descriptor *depend_tx,
 	dma_async_tx_callback cb_fn, void *cb_param)
 {
-	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMSET);
+	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMSET,
+						      &dest, 1, NULL, 0, len);
 	struct dma_device *device = chan ? chan->device : NULL;
 	struct dma_async_tx_descriptor *tx = NULL;
 
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c
index f39777f..56288218 100644
--- a/crypto/async_tx/async_tx.c
+++ b/crypto/async_tx/async_tx.c
@@ -361,13 +361,13 @@ static void __exit async_tx_exit(void)
 }
 
 /**
- * async_tx_find_channel - find a channel to carry out the operation or let
+ * __async_tx_find_channel - find a channel to carry out the operation or let
  *	the transaction execute synchronously
  * @depend_tx: transaction dependency
  * @tx_type: transaction 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)
 {
 	/* see if we can keep the chain on one channel */
@@ -383,7 +383,7 @@ async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
 	} else
 		return NULL;
 }
-EXPORT_SYMBOL_GPL(async_tx_find_channel);
+EXPORT_SYMBOL_GPL(__async_tx_find_channel);
 #else
 static int __init async_tx_init(void)
 {
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 68d2fe4..2259a4ff 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -129,7 +129,9 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
 	struct dma_async_tx_descriptor *depend_tx,
 	dma_async_tx_callback cb_fn, void *cb_param)
 {
-	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_XOR);
+	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_XOR,
+						      &dest, 1, src_list,
+						      src_cnt, len);
 	struct dma_device *device = chan ? chan->device : NULL;
 	struct dma_async_tx_descriptor *tx = NULL;
 	dma_async_tx_callback _cb_fn;
@@ -261,7 +263,9 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
 	struct dma_async_tx_descriptor *depend_tx,
 	dma_async_tx_callback cb_fn, void *cb_param)
 {
-	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_ZERO_SUM);
+	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_ZERO_SUM,
+						      &dest, 1, src_list,
+						      src_cnt, len);
 	struct dma_device *device = chan ? chan->device : NULL;
 	struct dma_async_tx_descriptor *tx = NULL;