dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic

Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to allow passing client/target specific information associated
with the data transfer.
Modify all affected DMA engine drivers.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 03d68b7e5705..b3b5b38776f0 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -582,10 +582,11 @@ 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_transfer_direction direction,
-                unsigned long flags);
+                unsigned long flags, void *context);
         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_transfer_direction direction);
+                size_t period_len, enum dma_transfer_direction direction,
+                void *context);
         struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
                 struct dma_chan *chan, struct dma_interleaved_template *xt,
                 unsigned long flags);
@@ -619,7 +620,8 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
         struct scatterlist sg;
         sg_init_one(&sg, buf, len);
 
-        return chan->device->device_prep_slave_sg(chan, &sg, 1, dir, flags);
+        return chan->device->device_prep_slave_sg(chan, &sg, 1,
+                                                  dir, flags, NULL);
 }
 
 static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_sg(
@@ -627,7 +629,7 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_sg(
         enum dma_transfer_direction dir, unsigned long flags)
 {
         return chan->device->device_prep_slave_sg(chan, sgl, sg_len,
-                                                  dir, flags);
+                                                  dir, flags, NULL);
 }
 
 static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic(
@@ -635,7 +637,7 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic(
                 size_t period_len, enum dma_transfer_direction dir)
 {
         return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len,
-                                                        period_len, dir);
+                                                period_len, dir, NULL);
 }
 
 static inline int dmaengine_terminate_all(struct dma_chan *chan)