From 49920bc66984a512f4bcc7735a61642cd0e4d6f2 Mon Sep 17 00:00:00 2001
From: Vinod Koul <vinod.koul@linux.intel.com>
Date: Thu, 13 Oct 2011 15:15:27 +0530
Subject: dmaengine: add new enum dma_transfer_direction
This new enum removes usage of dma_data_direction for dma direction. The new
enum cleans tells the DMA direction and mode
This further paves way for merging the dmaengine _prep operations and also for
interleaved dma
Suggested-by: Jassi Brar <jaswinder.singh@linaro.org>
Reviewed-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
---
include/linux/dmaengine.h | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index ace51af4369..d946ef7f5e6 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -23,7 +23,6 @@
#include <linux/device.h>
#include <linux/uio.h>
-#include <linux/dma-direction.h>
#include <linux/scatterlist.h>
/**
@@ -75,6 +74,19 @@ enum dma_transaction_type {
/* last transaction type for creation of the capabilities mask */
#define DMA_TX_TYPE_END (DMA_CYCLIC + 1)
+/**
+ * enum dma_transfer_direction - dma transfer mode and direction indicator
+ * @DMA_MEM_TO_MEM: Async/Memcpy mode
+ * @DMA_MEM_TO_DEV: Slave mode & From Memory to Device
+ * @DMA_DEV_TO_MEM: Slave mode & From Device to Memory
+ * @DMA_DEV_TO_DEV: Slave mode & From Device to Device
+ */
+enum dma_transfer_direction {
+ DMA_MEM_TO_MEM,
+ DMA_MEM_TO_DEV,
+ DMA_DEV_TO_MEM,
+ DMA_DEV_TO_DEV,
+};
/**
* enum dma_ctrl_flags - DMA flags to augment operation preparation,
@@ -267,7 +279,7 @@ enum dma_slave_buswidth {
* struct, if applicable.
*/
struct dma_slave_config {
- enum dma_data_direction direction;
+ enum dma_transfer_direction direction;
dma_addr_t src_addr;
dma_addr_t dst_addr;
enum dma_slave_buswidth src_addr_width;
@@ -490,11 +502,11 @@ struct dma_device {
struct dma_async_tx_descriptor *(*device_prep_slave_sg)(
struct dma_chan *chan, struct scatterlist *sgl,
- unsigned int sg_len, enum dma_data_direction direction,
+ unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_cyclic)(
struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
- size_t period_len, enum dma_data_direction direction);
+ size_t period_len, enum dma_transfer_direction direction);
int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg);
@@ -520,7 +532,7 @@ static inline int dmaengine_slave_config(struct dma_chan *chan,
static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
struct dma_chan *chan, void *buf, size_t len,
- enum dma_data_direction dir, unsigned long flags)
+ enum dma_transfer_direction dir, unsigned long flags)
{
struct scatterlist sg;
sg_init_one(&sg, buf, len);
--
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