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SubjectRe: [PATCH] dmaengine: pl330: Set DMA_INTERRUPT capability and add related callback
On 29-06-22, 15:00, Vivek Gautam wrote:
> With the verification for DMA_INTERRUPT capability added to the dmatest
> module, the dmatest fails to start for various channels of pl330 dma
> controller. So, set the DMA_INTERRUPT capability and add the required
> callback method to set the transaction descriptor flags.

Are you sire you want that? See 646728dff254 in linux-next

Thanks

>
> Signed-off-by: Vivek Gautam <vivek.gautam@arm.com>
> ---
> drivers/dma/pl330.c | 24 ++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index 858400e42ec0..b80e48f0970b 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -2757,6 +2757,28 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
> return &desc->txd;
> }
>
> +static struct dma_async_tx_descriptor *
> +pl330_dma_prep_interrupt(struct dma_chan *chan, unsigned long flags)
> +{
> + struct dma_pl330_chan *pch = to_pchan(chan);
> + struct dma_pl330_desc *desc;
> +
> + if (unlikely(!pch))
> + return NULL;
> +
> + desc = pl330_get_desc(pch);
> + if (!desc) {
> + dev_err(pch->dmac->ddma.dev, "%s:%d Unable to fetch desc\n",
> + __func__, __LINE__);
> + return NULL;
> + }
> +
> + /* Set the flags that are passed downstream */
> + desc->txd.flags = flags;
> +
> + return &desc->txd;
> +}
> +
> static struct dma_async_tx_descriptor *
> pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
> dma_addr_t src, size_t len, unsigned long flags)
> @@ -3111,6 +3133,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
> }
>
> dma_cap_set(DMA_MEMCPY, pd->cap_mask);
> + dma_cap_set(DMA_INTERRUPT, pd->cap_mask);
> if (pcfg->num_peri) {
> dma_cap_set(DMA_SLAVE, pd->cap_mask);
> dma_cap_set(DMA_CYCLIC, pd->cap_mask);
> @@ -3121,6 +3144,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
> pd->device_free_chan_resources = pl330_free_chan_resources;
> pd->device_prep_dma_memcpy = pl330_prep_dma_memcpy;
> pd->device_prep_dma_cyclic = pl330_prep_dma_cyclic;
> + pd->device_prep_dma_interrupt = pl330_dma_prep_interrupt;
> pd->device_tx_status = pl330_tx_status;
> pd->device_prep_slave_sg = pl330_prep_slave_sg;
> pd->device_config = pl330_config;
> --
> 2.17.1

--
~Vinod

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