Subject: [PATCH v3 04/15] dmaengine: Pass flags via device_prep_dma_cyclic() callback

From: [email-masked] (Nicolas Ferre)
Date: Mon, 17 Sep 2012 12:06:06 +0200

On 09/14/2012 02:05 PM, Peter Ujfalusi :
> Change the parameter list of device_prep_dma_cyclic() so the DMA drivers
> can receive the flags coming from clients.
> This feature can be used during audio operation to disable all audio
> related interrupts when the DMA_PREP_INTERRUPT is cleared from the flags.
> 
> Signed-off-by: Peter Ujfalusi <[email-masked]>
> CC: Nicolas Ferre <[email-masked]>
> CC: Barry Song <[email-masked]>
> CC: Srinidhi Kasagar <[email-masked]>
> CC: Russell King - ARM Linux <[email-masked]>
> CC: Vista Silicon <[email-masked]>
> CC: Zhangfei Gao <[email-masked]>
> CC: Shawn Guo <[email-masked]>
> CC: Laxman Dewangan <[email-masked]>
> ---
>  drivers/dma/at_hdmac.c        | 3 ++-

For Atmel's driver:

Acked-by: Nicolas Ferre <[email-masked]>

>  drivers/dma/ep93xx_dma.c      | 4 +++-
>  drivers/dma/imx-dma.c         | 2 +-
>  drivers/dma/imx-sdma.c        | 2 +-
>  drivers/dma/mmp_tdma.c        | 2 +-
>  drivers/dma/mxs-dma.c         | 2 +-
>  drivers/dma/omap-dma.c        | 3 ++-
>  drivers/dma/pl330.c           | 2 +-
>  drivers/dma/sa11x0-dma.c      | 2 +-
>  drivers/dma/sirf-dma.c        | 2 +-
>  drivers/dma/ste_dma40.c       | 3 ++-
>  drivers/dma/tegra20-apb-dma.c | 2 +-
>  include/linux/dmaengine.h     | 4 ++--
>  13 files changed, 19 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
> index 3934fcc..7e5f6b6 100644
> --- a/drivers/dma/at_hdmac.c
> +++ b/drivers/dma/at_hdmac.c
> @@ -841,12 +841,13 @@ atc_dma_cyclic_fill_desc(struct dma_chan *chan, struct at_desc *desc,
>   * @buf_len: total number of bytes for the entire buffer
>   * @period_len: number of bytes for each period
>   * @direction: transfer direction, to or from device
> + * @flags: tx descriptor status flags
>   * @context: transfer context (ignored)
>   */
>  static struct dma_async_tx_descriptor *
>  atc_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,
> -		void *context)
> +		unsigned long flags, void *context)
>  {
>  	struct at_dma_chan	*atchan = to_at_dma_chan(chan);
>  	struct at_dma_slave	*atslave = chan->private;
> diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
> index c64917e..493735b 100644
> --- a/drivers/dma/ep93xx_dma.c
> +++ b/drivers/dma/ep93xx_dma.c
> @@ -1120,6 +1120,7 @@ fail:
>   * @buf_len: length of the buffer (in bytes)
>   * @period_len: lenght of a single period
>   * @dir: direction of the operation
> + * @flags: tx descriptor status flags
>   * @context: operation context (ignored)
>   *
>   * Prepares a descriptor for cyclic DMA operation. This means that once the
> @@ -1133,7 +1134,8 @@ fail:
>  static struct dma_async_tx_descriptor *
>  ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
>  			   size_t buf_len, size_t period_len,
> -			   enum dma_transfer_direction dir, void *context)
> +			   enum dma_transfer_direction dir, unsigned long flags,
> +			   void *context)
>  {
>  	struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
>  	struct ep93xx_dma_desc *desc, *first;
> diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
> index 5084975..41b4376 100644
> --- a/drivers/dma/imx-dma.c
> +++ b/drivers/dma/imx-dma.c
> @@ -801,7 +801,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
>  static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
>  		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
>  		size_t period_len, enum dma_transfer_direction direction,
> -		void *context)
> +		unsigned long flags, void *context)
>  {
>  	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
>  	struct imxdma_engine *imxdma = imxdmac->imxdma;
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 1dc2a4a..2c5fd3e 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -1012,7 +1012,7 @@ err_out:
>  static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
>  		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
>  		size_t period_len, enum dma_transfer_direction direction,
> -		void *context)
> +		unsigned long flags, void *context)
>  {
>  	struct sdma_channel *sdmac = to_sdma_chan(chan);
>  	struct sdma_engine *sdma = sdmac->sdma;
> diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
> index 8a15cf2..6d52bd4 100644
> --- a/drivers/dma/mmp_tdma.c
> +++ b/drivers/dma/mmp_tdma.c
> @@ -358,7 +358,7 @@ struct mmp_tdma_desc *mmp_tdma_alloc_descriptor(struct mmp_tdma_chan *tdmac)
>  static struct dma_async_tx_descriptor *mmp_tdma_prep_dma_cyclic(
>  		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
>  		size_t period_len, enum dma_transfer_direction direction,
> -		void *context)
> +		unsigned long flags, void *context)
>  {
>  	struct mmp_tdma_chan *tdmac = to_mmp_tdma_chan(chan);
>  	struct mmp_tdma_desc *desc;
> diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
> index 7f41b25..734a4eb 100644
> --- a/drivers/dma/mxs-dma.c
> +++ b/drivers/dma/mxs-dma.c
> @@ -531,7 +531,7 @@ err_out:
>  static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
>  		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
>  		size_t period_len, enum dma_transfer_direction direction,
> -		void *context)
> +		unsigned long flags, void *context)
>  {
>  	struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
>  	struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
> diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
> index 71d7869..4d2650f 100644
> --- a/drivers/dma/omap-dma.c
> +++ b/drivers/dma/omap-dma.c
> @@ -366,7 +366,8 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg(
>  
>  static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic(
>  	struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
> -	size_t period_len, enum dma_transfer_direction dir, void *context)
> +	size_t period_len, enum dma_transfer_direction dir, unsigned long flags,
> +	void *context)
>  {
>  	struct omap_chan *c = to_omap_dma_chan(chan);
>  	enum dma_slave_buswidth dev_width;
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index e4feba6..0035645 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -2683,7 +2683,7 @@ static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len)
>  static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
>  		struct dma_chan *chan, dma_addr_t dma_addr, size_t len,
>  		size_t period_len, enum dma_transfer_direction direction,
> -		void *context)
> +		unsigned long flags, void *context)
>  {
>  	struct dma_pl330_desc *desc;
>  	struct dma_pl330_chan *pch = to_pchan(chan);
> diff --git a/drivers/dma/sa11x0-dma.c b/drivers/dma/sa11x0-dma.c
> index f5a7360..b893159 100644
> --- a/drivers/dma/sa11x0-dma.c
> +++ b/drivers/dma/sa11x0-dma.c
> @@ -614,7 +614,7 @@ static struct dma_async_tx_descriptor *sa11x0_dma_prep_slave_sg(
>  
>  static struct dma_async_tx_descriptor *sa11x0_dma_prep_dma_cyclic(
>  	struct dma_chan *chan, dma_addr_t addr, size_t size, size_t period,
> -	enum dma_transfer_direction dir, void *context)
> +	enum dma_transfer_direction dir, unsigned long flags, void *context)
>  {
>  	struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan);
>  	struct sa11x0_dma_desc *txd;
> diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
> index 434ad31..3eed8b3 100644
> --- a/drivers/dma/sirf-dma.c
> +++ b/drivers/dma/sirf-dma.c
> @@ -489,7 +489,7 @@ err_dir:
>  static struct dma_async_tx_descriptor *
>  sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr,
>  	size_t buf_len, size_t period_len,
> -	enum dma_transfer_direction direction, void *context)
> +	enum dma_transfer_direction direction, unsigned long flags, void *context)
>  {
>  	struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
>  	struct sirfsoc_dma_desc *sdesc = NULL;
> diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
> index 000d309..eee8d9b 100644
> --- a/drivers/dma/ste_dma40.c
> +++ b/drivers/dma/ste_dma40.c
> @@ -2347,7 +2347,8 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
>  static struct dma_async_tx_descriptor *
>  dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
>  		     size_t buf_len, size_t period_len,
> -		     enum dma_transfer_direction direction, void *context)
> +		     enum dma_transfer_direction direction, unsigned long flags,
> +		     void *context)
>  {
>  	unsigned int periods = buf_len / period_len;
>  	struct dma_async_tx_descriptor *txd;
> diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
> index 24acd71..b42b6ff 100644
> --- a/drivers/dma/tegra20-apb-dma.c
> +++ b/drivers/dma/tegra20-apb-dma.c
> @@ -990,7 +990,7 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg(
>  struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic(
>  	struct dma_chan *dc, dma_addr_t buf_addr, size_t buf_len,
>  	size_t period_len, enum dma_transfer_direction direction,
> -	void *context)
> +	unsigned long flags, void *context)
>  {
>  	struct tegra_dma_channel *tdc = to_tegra_dma_chan(dc);
>  	struct tegra_dma_desc *dma_desc = NULL;
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index 2abcac5..d3201e4 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -591,7 +591,7 @@ struct dma_device {
>  	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,
> -		void *context);
> +		unsigned long flags, void *context);
>  	struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
>  		struct dma_chan *chan, struct dma_interleaved_template *xt,
>  		unsigned long flags);
> @@ -657,7 +657,7 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic(
>  		unsigned long flags)
>  {
>  	return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len,
> -						period_len, dir, NULL);
> +						period_len, dir, flags, NULL);
>  }
>  
>  static inline int dmaengine_terminate_all(struct dma_chan *chan)
> 

-- 
Nicolas Ferre