Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752630AbbH0Iti (ORCPT ); Thu, 27 Aug 2015 04:49:38 -0400 Received: from lucky1.263xmail.com ([211.157.147.131]:38254 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752471AbbH0Itd (ORCPT ); Thu, 27 Aug 2015 04:49:33 -0400 X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 X-RL-SENDER: shawn.lin@rock-chips.com X-FST-TO: vinod.koul@intel.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: shawn.lin@rock-chips.com X-UNIQUE-TAG: <8792902d0c2e0fa615f63cfba1753072> X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Shawn Lin To: Vinod Koul , Heiko Stuebner Cc: Doug Anderson , Olof Johansson , Sonny Rao , Addy Ke , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, Shawn Lin , Boojin Kim Subject: [PATCH 1/5] DMA: pl330: support burst mode for dev-to-mem and mem-to-dev transmit Date: Thu, 27 Aug 2015 16:48:33 +0800 Message-Id: <1440665313-31603-1-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1440665280-31557-1-git-send-email-shawn.lin@rock-chips.com> References: <1440665280-31557-1-git-send-email-shawn.lin@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2752 Lines: 80 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 Reviewed-and-tested-by: Sonny Rao --- 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 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/