Re: [PATCH 2/2 V2] dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic

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On Thu, Mar 8, 2012 at 3:35 PM, Alexandre Bounine
<alexandre.bounine@xxxxxxx> wrote:
> 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.

Hi Alexandre,

Can you have a look at this failure in linux-next:

http://kisskb.ellerman.id.au/kisskb/buildresult/5933610/

sound/soc/soc-dmaengine-pcm.c:149:3: error: too few arguments to
function 'chan->device->device_prep_dma_cyclic'
make[3]: *** [sound/soc/soc-dmaengine-pcm.o] Error 1

I think it is caused by this commit.

Thanks,
Paul.

>
> Signed-off-by: Alexandre Bounine <alexandre.bounine@xxxxxxx>
> ---
>  drivers/dma/amba-pl08x.c    |    2 +-
>  drivers/dma/at_hdmac.c      |    7 +++++--
>  drivers/dma/coh901318.c     |    2 +-
>  drivers/dma/dw_dmac.c       |    2 +-
>  drivers/dma/ep93xx_dma.c    |    6 ++++--
>  drivers/dma/fsldma.c        |    4 +++-
>  drivers/dma/imx-dma.c       |    5 +++--
>  drivers/dma/imx-sdma.c      |    5 +++--
>  drivers/dma/intel_mid_dma.c |    3 ++-
>  drivers/dma/ipu/ipu_idmac.c |    3 ++-
>  drivers/dma/mxs-dma.c       |    5 +++--
>  drivers/dma/pch_dma.c       |    3 ++-
>  drivers/dma/pl330.c         |    5 +++--
>  drivers/dma/shdma.c         |    3 ++-
>  drivers/dma/sirf-dma.c      |    2 +-
>  drivers/dma/ste_dma40.c     |    5 +++--
>  drivers/dma/timb_dma.c      |    3 ++-
>  drivers/dma/txx9dmac.c      |    2 +-
>  include/linux/dmaengine.h   |   12 +++++++-----
>  19 files changed, 49 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
> index 8a28158..776f9e2 100644
> --- a/drivers/dma/amba-pl08x.c
> +++ b/drivers/dma/amba-pl08x.c
> @@ -1326,7 +1326,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
>  static struct dma_async_tx_descriptor *pl08x_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 pl08x_dma_chan *plchan = to_pl08x_chan(chan);
>        struct pl08x_driver_data *pl08x = plchan->host;
> diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
> index f4aed5f..e1a1d42 100644
> --- a/drivers/dma/at_hdmac.c
> +++ b/drivers/dma/at_hdmac.c
> @@ -659,11 +659,12 @@ err_desc_get:
>  * @sg_len: number of entries in @scatterlist
>  * @direction: DMA direction
>  * @flags: tx descriptor status flags
> + * @context: transaction context (ignored)
>  */
>  static struct dma_async_tx_descriptor *
>  atc_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 at_dma_chan      *atchan = to_at_dma_chan(chan);
>        struct at_dma_slave     *atslave = chan->private;
> @@ -860,10 +861,12 @@ atc_dma_cyclic_fill_desc(struct at_dma_slave *atslave, 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
> + * @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)
> +               size_t period_len, enum dma_transfer_direction direction,
> +               void *context)
>  {
>        struct at_dma_chan      *atchan = to_at_dma_chan(chan);
>        struct at_dma_slave     *atslave = chan->private;
> diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
> index d65a718..f42b54e 100644
> --- a/drivers/dma/coh901318.c
> +++ b/drivers/dma/coh901318.c
> @@ -1035,7 +1035,7 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
>  static struct dma_async_tx_descriptor *
>  coh901318_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 coh901318_chan *cohc = to_coh901318_chan(chan);
>        struct coh901318_lli *lli;
> diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
> index 9b592b0..058bddf 100644
> --- a/drivers/dma/dw_dmac.c
> +++ b/drivers/dma/dw_dmac.c
> @@ -731,7 +731,7 @@ err_desc_get:
>  static struct dma_async_tx_descriptor *
>  dwc_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 dw_dma_chan      *dwc = to_dw_dma_chan(chan);
>        struct dw_dma_slave     *dws = chan->private;
> diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
> index 59e7a96..c79de61 100644
> --- a/drivers/dma/ep93xx_dma.c
> +++ b/drivers/dma/ep93xx_dma.c
> @@ -983,13 +983,14 @@ fail:
>  * @sg_len: number of entries in @sgl
>  * @dir: direction of tha DMA transfer
>  * @flags: flags for the descriptor
> + * @context: operation context (ignored)
>  *
>  * Returns a valid DMA descriptor or %NULL in case of failure.
>  */
>  static struct dma_async_tx_descriptor *
>  ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
>                         unsigned int sg_len, enum dma_transfer_direction dir,
> -                        unsigned long flags)
> +                        unsigned long flags, void *context)
>  {
>        struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
>        struct ep93xx_dma_desc *desc, *first;
> @@ -1056,6 +1057,7 @@ fail:
>  * @buf_len: length of the buffer (in bytes)
>  * @period_len: lenght of a single period
>  * @dir: direction of the operation
> + * @context: operation context (ignored)
>  *
>  * Prepares a descriptor for cyclic DMA operation. This means that once the
>  * descriptor is submitted, we will be submitting in a @period_len sized
> @@ -1068,7 +1070,7 @@ 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)
> +                          enum dma_transfer_direction dir, void *context)
>  {
>        struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
>        struct ep93xx_dma_desc *desc, *first;
> diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
> index b98070c..51d33e5 100644
> --- a/drivers/dma/fsldma.c
> +++ b/drivers/dma/fsldma.c
> @@ -765,6 +765,7 @@ fail:
>  * @sg_len: number of entries in @scatterlist
>  * @direction: DMA direction
>  * @flags: DMAEngine flags
> + * @context: transaction context (ignored)
>  *
>  * Prepare a set of descriptors for a DMA_SLAVE transaction. Following the
>  * DMA_SLAVE API, this gets the device-specific information from the
> @@ -772,7 +773,8 @@ fail:
>  */
>  static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
>        struct dma_chan *dchan, struct scatterlist *sgl, unsigned int sg_len,
> -       enum dma_transfer_direction direction, unsigned long flags)
> +       enum dma_transfer_direction direction, unsigned long flags,
> +       void *context)
>  {
>        /*
>         * This operation is not supported on the Freescale DMA controller
> diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
> index e4383ee..42d5dc5 100644
> --- a/drivers/dma/imx-dma.c
> +++ b/drivers/dma/imx-dma.c
> @@ -225,7 +225,7 @@ static void imxdma_free_chan_resources(struct dma_chan *chan)
>  static struct dma_async_tx_descriptor *imxdma_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 imxdma_channel *imxdmac = to_imxdma_chan(chan);
>        struct scatterlist *sg;
> @@ -271,7 +271,8 @@ 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)
> +               size_t period_len, enum dma_transfer_direction direction,
> +               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 8bc5acf..5313946 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -917,7 +917,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan)
>  static struct dma_async_tx_descriptor *sdma_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 sdma_channel *sdmac = to_sdma_chan(chan);
>        struct sdma_engine *sdma = sdmac->sdma;
> @@ -1015,7 +1015,8 @@ 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)
> +               size_t period_len, enum dma_transfer_direction direction,
> +               void *context)
>  {
>        struct sdma_channel *sdmac = to_sdma_chan(chan);
>        struct sdma_engine *sdma = sdmac->sdma;
> diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
> index 74f70aa..2a202e5 100644
> --- a/drivers/dma/intel_mid_dma.c
> +++ b/drivers/dma/intel_mid_dma.c
> @@ -732,13 +732,14 @@ err_desc_get:
>  * @sg_len: length of sg txn
>  * @direction: DMA transfer dirtn
>  * @flags: DMA flags
> + * @context: transfer context (ignored)
>  *
>  * Prepares LLI based periphral transfer
>  */
>  static struct dma_async_tx_descriptor *intel_mid_dma_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 intel_mid_dma_chan *midc = NULL;
>        struct intel_mid_dma_slave *mids = NULL;
> diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
> index 6212b16..aadd57c 100644
> --- a/drivers/dma/ipu/ipu_idmac.c
> +++ b/drivers/dma/ipu/ipu_idmac.c
> @@ -1341,7 +1341,8 @@ static void ipu_gc_tasklet(unsigned long arg)
>  /* Allocate and initialise a transfer descriptor. */
>  static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan,
>                struct scatterlist *sgl, unsigned int sg_len,
> -               enum dma_transfer_direction direction, unsigned long tx_flags)
> +               enum dma_transfer_direction direction, unsigned long tx_flags,
> +               void *context)
>  {
>        struct idmac_channel *ichan = to_idmac_chan(chan);
>        struct idmac_tx_desc *desc = NULL;
> diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
> index b06cd4c..3e65974 100644
> --- a/drivers/dma/mxs-dma.c
> +++ b/drivers/dma/mxs-dma.c
> @@ -352,7 +352,7 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan)
>  static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
>                struct dma_chan *chan, struct scatterlist *sgl,
>                unsigned int sg_len, enum dma_transfer_direction direction,
> -               unsigned long append)
> +               unsigned long append, void *context)
>  {
>        struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
>        struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
> @@ -447,7 +447,8 @@ 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)
> +               size_t period_len, enum dma_transfer_direction direction,
> +               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/pch_dma.c b/drivers/dma/pch_dma.c
> index 823f581..d0a334d 100644
> --- a/drivers/dma/pch_dma.c
> +++ b/drivers/dma/pch_dma.c
> @@ -607,7 +607,8 @@ static void pd_issue_pending(struct dma_chan *chan)
>
>  static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
>                        struct scatterlist *sgl, unsigned int sg_len,
> -                       enum dma_transfer_direction direction, unsigned long flags)
> +                       enum dma_transfer_direction direction, unsigned long flags,
> +                       void *context)
>  {
>        struct pch_dma_chan *pd_chan = to_pd_chan(chan);
>        struct pch_dma_slave *pd_slave = chan->private;
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index b8ec03e..1e8dee6 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -621,7 +621,8 @@ 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)
> +               size_t period_len, enum dma_transfer_direction direction,
> +               void *context)
>  {
>        struct dma_pl330_desc *desc;
>        struct dma_pl330_chan *pch = to_pchan(chan);
> @@ -711,7 +712,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
>  static struct dma_async_tx_descriptor *
>  pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
>                unsigned int sg_len, enum dma_transfer_direction direction,
> -               unsigned long flg)
> +               unsigned long flg, void *context)
>  {
>        struct dma_pl330_desc *first, *desc = NULL;
>        struct dma_pl330_chan *pch = to_pchan(chan);
> diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
> index 812fd76..6b94f22 100644
> --- a/drivers/dma/shdma.c
> +++ b/drivers/dma/shdma.c
> @@ -673,7 +673,8 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
>
>  static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
>        struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len,
> -       enum dma_transfer_direction direction, unsigned long flags)
> +       enum dma_transfer_direction direction, unsigned long flags,
> +       void *context)
>  {
>        struct sh_dmae_slave *param;
>        struct sh_dmae_chan *sh_chan;
> diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
> index 2333810..b899a86 100644
> --- a/drivers/dma/sirf-dma.c
> +++ b/drivers/dma/sirf-dma.c
> @@ -497,7 +497,7 @@ 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)
> +       enum dma_transfer_direction direction, 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 cc5ecbc..3cbf78e 100644
> --- a/drivers/dma/ste_dma40.c
> +++ b/drivers/dma/ste_dma40.c
> @@ -2299,7 +2299,8 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
>                                                         struct scatterlist *sgl,
>                                                         unsigned int sg_len,
>                                                         enum dma_transfer_direction direction,
> -                                                        unsigned long dma_flags)
> +                                                        unsigned long dma_flags,
> +                                                        void *context)
>  {
>        if (direction != DMA_DEV_TO_MEM && direction != DMA_MEM_TO_DEV)
>                return NULL;
> @@ -2310,7 +2311,7 @@ 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)
> +                    enum dma_transfer_direction direction, void *context)
>  {
>        unsigned int periods = buf_len / period_len;
>        struct dma_async_tx_descriptor *txd;
> diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
> index a6f9c16..a4c61ed 100644
> --- a/drivers/dma/timb_dma.c
> +++ b/drivers/dma/timb_dma.c
> @@ -558,7 +558,8 @@ static void td_issue_pending(struct dma_chan *chan)
>
>  static struct dma_async_tx_descriptor *td_prep_slave_sg(struct dma_chan *chan,
>        struct scatterlist *sgl, unsigned int sg_len,
> -       enum dma_transfer_direction direction, unsigned long flags)
> +       enum dma_transfer_direction direction, unsigned long flags,
> +       void *context)
>  {
>        struct timb_dma_chan *td_chan =
>                container_of(chan, struct timb_dma_chan, chan);
> diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
> index 6122c36..fa66ebb 100644
> --- a/drivers/dma/txx9dmac.c
> +++ b/drivers/dma/txx9dmac.c
> @@ -846,7 +846,7 @@ txx9dmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
>  static struct dma_async_tx_descriptor *
>  txx9dmac_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 txx9dmac_chan *dc = to_txx9dmac_chan(chan);
>        struct txx9dmac_dev *ddev = dc->ddev;
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index 6e88f09..9a8140f 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -575,10 +575,11 @@ 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);
> @@ -612,7 +613,8 @@ 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(
> @@ -620,7 +622,7 @@ 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(
> @@ -628,7 +630,7 @@ 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)
> --
> 1.7.8.4
>
> --
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