Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756072AbbHaWXZ (ORCPT ); Mon, 31 Aug 2015 18:23:25 -0400 Received: from mail-vk0-f42.google.com ([209.85.213.42]:34781 "EHLO mail-vk0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756035AbbHaWXU (ORCPT ); Mon, 31 Aug 2015 18:23:20 -0400 MIME-Version: 1.0 In-Reply-To: <1440722268-31637-1-git-send-email-shawn.lin@rock-chips.com> References: <1440722176-31588-1-git-send-email-shawn.lin@rock-chips.com> <1440722268-31637-1-git-send-email-shawn.lin@rock-chips.com> From: Sonny Rao Date: Mon, 31 Aug 2015 15:22:59 -0700 X-Google-Sender-Auth: rjNnEk2H_BCrk_Zm8ScirPKywnI Message-ID: Subject: Re: [PATCH v2 1/5] DMA: pl330: support burst mode for dev-to-mem and mem-to-dev transmit To: Shawn Lin Cc: Vinod Koul , Heiko Stuebner , Boojin Kim , Doug Anderson , Olof Johansson , Addy Ke , dmaengine@vger.kernel.org, "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "open list:ARM/Rockchip SoC..." Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3882 Lines: 100 On Thu, Aug 27, 2015 at 5:37 PM, Shawn Lin wrote: > From: Boojin Kim > > This patch adds to support burst mode for dev-to-mem and > mem-to-dev transmit. > > Signed-off-by: Boojin Kim > Signed-off-by: Addy Ke > Signed-off-by: Shawn Lin > cc: Heiko Stuebner > cc: Doug Anderson > cc: Olof Johansson > > --- > > Changes in v2: > - amend the author > - amend Olof's mail address > > Changes in v1: > - rename broken-no-flushp to "arm,pl330-broken-no-flushp" suggested > by Krzysztof. > - add From original author. > - remove Sunny's tag > > 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 Reviewed-by: Sonny Rao > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/