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>
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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@ -1313,7 +1313,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
static struct dma_async_tx_descriptor *pl08x_prep_slave_sg( static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl, struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_dma_chan *plchan = to_pl08x_chan(chan);
struct pl08x_driver_data *pl08x = plchan->host; struct pl08x_driver_data *pl08x = plchan->host;

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@ -639,11 +639,12 @@ err_desc_get:
* @sg_len: number of entries in @scatterlist * @sg_len: number of entries in @scatterlist
* @direction: DMA direction * @direction: DMA direction
* @flags: tx descriptor status flags * @flags: tx descriptor status flags
* @context: transaction context (ignored)
*/ */
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_chan *atchan = to_at_dma_chan(chan);
struct at_dma_slave *atslave = chan->private; struct at_dma_slave *atslave = chan->private;
@ -840,10 +841,12 @@ atc_dma_cyclic_fill_desc(struct at_dma_slave *atslave, struct at_desc *desc,
* @buf_len: total number of bytes for the entire buffer * @buf_len: total number of bytes for the entire buffer
* @period_len: number of bytes for each period * @period_len: number of bytes for each period
* @direction: transfer direction, to or from device * @direction: transfer direction, to or from device
* @context: transfer context (ignored)
*/ */
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, 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_chan *atchan = to_at_dma_chan(chan);
struct at_dma_slave *atslave = chan->private; struct at_dma_slave *atslave = chan->private;

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@ -1021,7 +1021,7 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_chan *cohc = to_coh901318_chan(chan);
struct coh901318_lli *lli; struct coh901318_lli *lli;

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@ -704,7 +704,7 @@ err_desc_get:
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_chan *dwc = to_dw_dma_chan(chan);
struct dw_dma_slave *dws = chan->private; struct dw_dma_slave *dws = chan->private;

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@ -975,13 +975,14 @@ fail:
* @sg_len: number of entries in @sgl * @sg_len: number of entries in @sgl
* @dir: direction of tha DMA transfer * @dir: direction of tha DMA transfer
* @flags: flags for the descriptor * @flags: flags for the descriptor
* @context: operation context (ignored)
* *
* Returns a valid DMA descriptor or %NULL in case of failure. * Returns a valid DMA descriptor or %NULL in case of failure.
*/ */
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction dir, 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_chan *edmac = to_ep93xx_dma_chan(chan);
struct ep93xx_dma_desc *desc, *first; struct ep93xx_dma_desc *desc, *first;
@ -1048,6 +1049,7 @@ fail:
* @buf_len: length of the buffer (in bytes) * @buf_len: length of the buffer (in bytes)
* @period_len: lenght of a single period * @period_len: lenght of a single period
* @dir: direction of the operation * @dir: direction of the operation
* @context: operation context (ignored)
* *
* Prepares a descriptor for cyclic DMA operation. This means that once the * Prepares a descriptor for cyclic DMA operation. This means that once the
* descriptor is submitted, we will be submitting in a @period_len sized * descriptor is submitted, we will be submitting in a @period_len sized
@ -1060,7 +1062,7 @@ fail:
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
size_t buf_len, size_t period_len, 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_chan *edmac = to_ep93xx_dma_chan(chan);
struct ep93xx_dma_desc *desc, *first; struct ep93xx_dma_desc *desc, *first;

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@ -759,6 +759,7 @@ fail:
* @sg_len: number of entries in @scatterlist * @sg_len: number of entries in @scatterlist
* @direction: DMA direction * @direction: DMA direction
* @flags: DMAEngine flags * @flags: DMAEngine flags
* @context: transaction context (ignored)
* *
* Prepare a set of descriptors for a DMA_SLAVE transaction. Following the * Prepare a set of descriptors for a DMA_SLAVE transaction. Following the
* DMA_SLAVE API, this gets the device-specific information from the * DMA_SLAVE API, this gets the device-specific information from the
@ -766,7 +767,8 @@ fail:
*/ */
static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg( static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
struct dma_chan *dchan, struct scatterlist *sgl, unsigned int sg_len, 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 * This operation is not supported on the Freescale DMA controller

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@ -354,7 +354,7 @@ static void imxdma_free_chan_resources(struct dma_chan *chan)
static struct dma_async_tx_descriptor *imxdma_prep_slave_sg( static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl, struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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 imxdma_channel *imxdmac = to_imxdma_chan(chan);
struct scatterlist *sg; struct scatterlist *sg;
@ -405,7 +405,8 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic( static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, 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_channel *imxdmac = to_imxdma_chan(chan);
struct imxdma_engine *imxdma = imxdmac->imxdma; struct imxdma_engine *imxdma = imxdmac->imxdma;

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@ -903,7 +903,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan)
static struct dma_async_tx_descriptor *sdma_prep_slave_sg( static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl, struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma; struct sdma_engine *sdma = sdmac->sdma;
@ -1001,7 +1001,8 @@ err_out:
static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, 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_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma; struct sdma_engine *sdma = sdmac->sdma;

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@ -714,13 +714,14 @@ err_desc_get:
* @sg_len: length of sg txn * @sg_len: length of sg txn
* @direction: DMA transfer dirtn * @direction: DMA transfer dirtn
* @flags: DMA flags * @flags: DMA flags
* @context: transfer context (ignored)
* *
* Prepares LLI based periphral transfer * Prepares LLI based periphral transfer
*/ */
static struct dma_async_tx_descriptor *intel_mid_dma_prep_slave_sg( static struct dma_async_tx_descriptor *intel_mid_dma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl, struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_chan *midc = NULL;
struct intel_mid_dma_slave *mids = NULL; struct intel_mid_dma_slave *mids = NULL;

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@ -1335,7 +1335,8 @@ static void ipu_gc_tasklet(unsigned long arg)
/* Allocate and initialise a transfer descriptor. */ /* Allocate and initialise a transfer descriptor. */
static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan, static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, unsigned int sg_len, 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_channel *ichan = to_idmac_chan(chan);
struct idmac_tx_desc *desc = NULL; struct idmac_tx_desc *desc = NULL;

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@ -340,7 +340,7 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan)
static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg( static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl, struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_chan *mxs_chan = to_mxs_dma_chan(chan);
struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma; struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
@ -435,7 +435,8 @@ err_out:
static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic( static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, 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_chan *mxs_chan = to_mxs_dma_chan(chan);
struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma; struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;

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@ -587,7 +587,8 @@ static void pd_issue_pending(struct dma_chan *chan)
static struct dma_async_tx_descriptor *pd_prep_slave_sg(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, 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_chan *pd_chan = to_pd_chan(chan);
struct pch_dma_slave *pd_slave = chan->private; struct pch_dma_slave *pd_slave = chan->private;

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@ -2685,7 +2685,8 @@ static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len)
static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic( static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t len, 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_desc *desc;
struct dma_pl330_chan *pch = to_pchan(chan); struct dma_pl330_chan *pch = to_pchan(chan);
@ -2775,7 +2776,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_desc *first, *desc = NULL;
struct dma_pl330_chan *pch = to_pchan(chan); struct dma_pl330_chan *pch = to_pchan(chan);

View File

@ -669,7 +669,8 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg( static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len, 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_slave *param;
struct sh_dmae_chan *sh_chan; struct sh_dmae_chan *sh_chan;

View File

@ -489,7 +489,7 @@ err_dir:
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr, sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr,
size_t buf_len, size_t period_len, 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_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
struct sirfsoc_dma_desc *sdesc = NULL; struct sirfsoc_dma_desc *sdesc = NULL;

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@ -2289,7 +2289,8 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, struct scatterlist *sgl,
unsigned int sg_len, unsigned int sg_len,
enum dma_transfer_direction direction, 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) if (direction != DMA_DEV_TO_MEM && direction != DMA_MEM_TO_DEV)
return NULL; return NULL;
@ -2300,7 +2301,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
size_t buf_len, size_t period_len, 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; unsigned int periods = buf_len / period_len;
struct dma_async_tx_descriptor *txd; struct dma_async_tx_descriptor *txd;

View File

@ -542,7 +542,8 @@ static void td_issue_pending(struct dma_chan *chan)
static struct dma_async_tx_descriptor *td_prep_slave_sg(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, 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 = struct timb_dma_chan *td_chan =
container_of(chan, struct timb_dma_chan, chan); container_of(chan, struct timb_dma_chan, chan);

View File

@ -833,7 +833,7 @@ txx9dmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
static struct dma_async_tx_descriptor * static struct dma_async_tx_descriptor *
txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_chan *dc = to_txx9dmac_chan(chan);
struct txx9dmac_dev *ddev = dc->ddev; struct txx9dmac_dev *ddev = dc->ddev;

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@ -582,10 +582,11 @@ struct dma_device {
struct dma_async_tx_descriptor *(*device_prep_slave_sg)( struct dma_async_tx_descriptor *(*device_prep_slave_sg)(
struct dma_chan *chan, struct scatterlist *sgl, struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction, 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_async_tx_descriptor *(*device_prep_dma_cyclic)(
struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, 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_async_tx_descriptor *(*device_prep_interleaved_dma)(
struct dma_chan *chan, struct dma_interleaved_template *xt, struct dma_chan *chan, struct dma_interleaved_template *xt,
unsigned long flags); unsigned long flags);
@ -619,7 +620,8 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
struct scatterlist sg; struct scatterlist sg;
sg_init_one(&sg, buf, len); 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( 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) enum dma_transfer_direction dir, unsigned long flags)
{ {
return chan->device->device_prep_slave_sg(chan, sgl, sg_len, 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( 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) size_t period_len, enum dma_transfer_direction dir)
{ {
return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len, 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) static inline int dmaengine_terminate_all(struct dma_chan *chan)