Re: [PATCH 1/5] DMA: pl330: support burst mode for dev-to-mem and mem-to-dev transmit

[Shawn Lin]

On 2015/8/27 16:57, Heiko Stuebner wrote:
> Hi Shawn,
>
>
> you're loosing the original author. Your can override the patch-author (away
> from the mail sender) via a "From:" line at the top of the commit message,
> like:

Woops.... sorry for missing this bit. Thanks for pointing out that. :)

Patch 1 is from Boojin, and patch 2,3 attribute to Addy(Actually I 
rebase it for linux-next from v3.14). patch 4 and 5 comes from myself.

It will be fixed from the next ones if any.

> ------
> From: Boojin Kim <boojin.kim@xxxxxxxxxxx>
>
> This patch adds to support burst mode for dev-to-mem and
> mem-to-dev transmit.
> ...
> ------
>
>
> > This patch adds to support burst mode for dev-to-mem and
> > mem-to-dev transmit.
> >
> > Signed-off-by: Boojin Kim <boojin.kim@xxxxxxxxxxx>
> > Signed-off-by: Addy Ke <addy.ke@xxxxxxxxxxxxxx>
> > Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
> > cc: Heiko Stuebner <heiko@xxxxxxxxx>
> > cc: Doug Anderson <dianders@xxxxxxxxxxxx>
> > cc: Olof Johansson <olofj@xxxxxxxxxx>
> > Reviewed-and-tested-by: Sonny Rao <sonnyrao@xxxxxxxxxxxx>
> >
> > ---
> >
> >   drivers/dma/pl330.c | 18 ++++++++++++------
> >   1 file changed, 12 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> > index ecab4ea0..0d544d2 100644
> > --- a/drivers/dma/pl330.c
> > +++ b/drivers/dma/pl330.c
> > @@ -1141,10 +1141,13 @@ static inline int _ldst_devtomem(unsigned dry_run,
> > u8 buf[], const struct _xfer_spec *pxs, int cyc)
> >   {
> >   	int off = 0;
> > +	enum pl330_cond cond;
> > +
> > +	cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;
> >
> >   	while (cyc--) {
> > -		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
> > -		off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
> > +		off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
> > +		off += _emit_LDP(dry_run, &buf[off], cond, pxs->desc->peri);
> >   		off += _emit_ST(dry_run, &buf[off], ALWAYS);
> >   		off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);
> >   	}
> > @@ -1156,11 +1159,14 @@ static inline int _ldst_memtodev(unsigned dry_run,
> > u8 buf[], const struct _xfer_spec *pxs, int cyc)
> >   {
> >   	int off = 0;
> > +	enum pl330_cond cond;
> > +
> > +	cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;
> >
> >   	while (cyc--) {
> > -		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
> > +		off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
> >   		off += _emit_LD(dry_run, &buf[off], ALWAYS);
> > -		off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
> > +		off += _emit_STP(dry_run, &buf[off], cond, pxs->desc->peri);
> >   		off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);
> >   	}
> >
> > @@ -2557,7 +2563,7 @@ static struct dma_async_tx_descriptor
> > *pl330_prep_dma_cyclic(
> >
> >   		desc->rqtype = direction;
> >   		desc->rqcfg.brst_size = pch->burst_sz;
> > -		desc->rqcfg.brst_len = 1;
> > +		desc->rqcfg.brst_len = pch->burst_len;
> >   		desc->bytes_requested = period_len;
> >   		fill_px(&desc->px, dst, src, period_len);
> >
> > @@ -2702,7 +2708,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct
> > scatterlist *sgl, }
> >
> >   		desc->rqcfg.brst_size = pch->burst_sz;
> > -		desc->rqcfg.brst_len = 1;
> > +		desc->rqcfg.brst_len = pch->burst_len;
> >   		desc->rqtype = direction;
> >   		desc->bytes_requested = sg_dma_len(sg);
> >   	}


--
Best Regards
Shawn Lin

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