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dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic

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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>
This commit is contained in:
Alexandre Bounine
2012-03-08 15:35:13 -05:00
committed by Vinod Koul
parent 16052827d9
commit 185ecb5f4f
19 changed files with 49 additions and 30 deletions
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12
include/linux/dmaengine.h
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@@ -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)