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Diffstat (limited to 'include/linux/dmaengine.h')
-rw-r--r--include/linux/dmaengine.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 4d6c1c925fd..86853ed7970 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -48,6 +48,9 @@ enum dma_status {
/**
* enum dma_transaction_type - DMA transaction types/indexes
+ *
+ * Note: The DMA_ASYNC_TX capability is not to be set by drivers. It is
+ * automatically set as dma devices are registered.
*/
enum dma_transaction_type {
DMA_MEMCPY,
@@ -61,6 +64,7 @@ enum dma_transaction_type {
DMA_MEMCPY_CRC32C,
DMA_INTERRUPT,
DMA_PRIVATE,
+ DMA_ASYNC_TX,
DMA_SLAVE,
};
@@ -396,7 +400,11 @@ static inline void net_dmaengine_put(void)
#ifdef CONFIG_ASYNC_TX_DMA
#define async_dmaengine_get() dmaengine_get()
#define async_dmaengine_put() dmaengine_put()
+#ifdef CONFIG_ASYNC_TX_DISABLE_CHANNEL_SWITCH
+#define async_dma_find_channel(type) dma_find_channel(DMA_ASYNC_TX)
+#else
#define async_dma_find_channel(type) dma_find_channel(type)
+#endif /* CONFIG_ASYNC_TX_DISABLE_CHANNEL_SWITCH */
#else
static inline void async_dmaengine_get(void)
{
@@ -409,7 +417,7 @@ async_dma_find_channel(enum dma_transaction_type type)
{
return NULL;
}
-#endif
+#endif /* CONFIG_ASYNC_TX_DMA */
dma_cookie_t dma_async_memcpy_buf_to_buf(struct dma_chan *chan,
void *dest, void *src, size_t len);