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

[Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>]

在 2015/8/29 2:19, Sonny Rao 写道:
> On Thu, Aug 27, 2015 at 6:28 AM, Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> wrote:
> > 在 2015/8/27 20:57, Krzysztof Kozlowski 写道:
> > > 2015-08-27 17:48 GMT+09:00 Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>:
> > > > 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>
> > >
> > >
> > > For the entire patchset: I would prefer to see someone's
> > > reviewed/tested tag in his response. Sending a version 1 of patchset
> > > (regardless of Boojin Kim's work two years ago) with such tag could
> > > mean anything. I cannot verify it easily (unless digging somewhere...
> > > or asking people). You could add for example: Reviewed-by Santa Claus.
> > > Should I sent a letter to him asking for confirmation? :)
> >
> > :) yes, you are right. I should comply with the rule, even if the patchest
> > had been reviewed or tested by someone on another tree.
>
> Hi, yeah I reviewed on a different tree, so you shouldn't put that tag
> here, thanks for removing it.
> I can re-review if you'd like.

Hi, sunny, Thanks for reply.
It's very great if you can help me re-review the patchset here. :)

> > > More seriously - reviewed-by is a statement (please look at
> > > Documentation/SubmittingPatches) and you cannot force someone to make
> > > that statement. He must make such statement on his own.
> > >
> > > That's all from my side since I don't feel skilled enough to review the
> > > code.
> > >
> > > Best regards,
> > > Krzysztof
> > >
> > > > ---
> > > >
> > > >    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);
> > > >           }
> > > > --
> > > > 2.3.7
> > > >
> > > >
> > > > --
> > > > To unsubscribe from this list: send the line "unsubscribe dmaengine" in
> > > > the body of a message to majordomo@xxxxxxxxxxxxxxx
> > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >
> >
> > --
> > Best Regards
> > Shawn Lin
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@xxxxxxxxxxxxxxx
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/


--
Best Regards
Shawn Lin

--
To unsubscribe from this list: send the line "unsubscribe dmaengine" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html